Journal of Agricultural Research

JOURNAL OF AGRICULTURAL RESEARCH

VOLUME XX OCTOBER i, 1920—MARCH 15, 1921

PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE WITH THE COOPERATION OF THE ASSOCIATION OF LAND-GRANT COLLEGES

WASHINGTON, D. C. EDITORIAL COMMITTEE OF THE UNITED STATES DEPARTMENT OF AGRICULTURE AND THE ASSOCIATION OF LAND-GRANT COLLEGES

FOR THE DEPARTMENT FOR THE ASSOCIATION KARL F. KELLERMAN, CHAIRMAN J. G. LIPMAN Physiologist and Associate Chief, Bureau Dean, State College of Agriculture, and of Plant Industry Director, New Jersey Agricultural Experi- ment Station, Rutgers College EDWIN W. ALLEN Chief, Office of Experiment Stations W. A. RILEY Entomologist and Chief, Division of Ento- CHARLES L. MARLATT mology and Economic Zoology, Agricul- Entomologist and Assistant Chief, Bureau tural Experiment Station of the University of Entomology of Minnesota R. L. WATTS Dean, School of Agriculture, and Director, Agricultural Experiment Station, The Pennsylvania State College

All correspondence regarding articles from the Department of Agriculture should be addressed to Karl F. Kellerman, Journal of Agricultural Research, Washington, D. C. All correspondence regarding articles from State Experiment Stations should be addressed to J. G. Lipman, New Jersey Agricultural Experiment Station, New Brunswick, N. J. 7C4?M

CONTENTS Page Fusarium-Blight (Scab) of Wheat and Other Cereals. DIMITR ATANASOFF i Cause of Lime-Induced Chlorosis and Availability of Iron in the Soil. P. L. QihH and J. O. CARRERO 33 An Experimental Study of Echinacea Therapy. JAMES F. COUCH and LKIGH T. Gii/fNKR 63 Investigations of the Germicidal Value of Some of the Chloriu Disinfectants. F. W. TIUJîY 85 A New Avocado Weevil from the Canal Zone. H. F. DiKTz and H. S. BARBKR m Studies in Mustard Seeds and Substitutes: I. Chinese Colza (Brassica campestris chinoleifera Viehoever). ARNO VIE- IIOEVER, JOSEPH F. CI^EVENGER, and CLARE OUN EWING. ... 117 Study of Some Poultry Feed Mixtures with Reference to Their Potential Acidity and Their Potential Alkalinity. B. F. KAUPP and J. E. IVEY 141 The Influence of Cold in Stimulating the Growth of Plants. FREDERICK V. COVILLE 151 Composition of Normal and Mottled Citrus Leaves. W. P. KEU,EY and A. B. CUMMINS 161 Control of Fluke Diseases by Destruction of the Intermediate Host. ASA C. CHANDLER 193 Injury to Seed Wheat Resulting from Diying after Disinfection with Formaldehyde. ANNIE MAY HURD 209 Studies on the Life History and Habits of the Beet Leaf hopper. C. F. STAHL . 245 Hypertrophied Lenticéis on the Roots of Conifers and Their Relation to Moisture and Aeration. GLENN G. HAHN, CARL HARTLEY, and ARTHUR S. RHOADS 253 Degree of Temperature to Which Soils Can Be Cooled without Freezing. GEORGE BOUYOUCOS 267 Changes Taking Place in the Tempering of Wheat. E. L. TAGUE . 271 Vascular Discoloration of Irish Potato Tubers. H. A. EDSON. . 277 Crownwart of Alfalfa Caused by Urophlyctis alfalfae. FRED RUEL JONES and CHARLES DRECHSLER 295 Pathological Anatomy of Potato Blackleg. ERNST F. ART- 2 SCHWAGER 3 5 (m) IV Journal of Agricultural Research voi.xx

Sclerotinia minor, n. sp., the Cause of a Decay of Lettuce, Celery, paf;e and Other Crops. IVAN C. JAGGHR 331 Permanence of Differences in the Plots of an Experimental Field. J. ARTHUR HARRIS and C. S. ScoimsLD 335 Some Changes in Florida Grapefruit in Storage. LON A. HAW- KINS and J. R. MAGNESS 357 A Bacteriological Study of Canned Ripe Olives. STEWART A. KOSER 375 Relation of the Soil Solution to the Soil Extract. D. R. HOAG- IVAND, J. C. MARTIN, and G. R. STEWART 381 Effect of Season and Crop Growth on the Physical State of the Soil. D. R. HOAGIVAND and J. C. MARTIN 397 Carbon-Dioxid Content of Bam Air. MARY F. HENDRY and ALICE) JOHNSON 405 Rice Weevil, (Calandra) Sitophilus oryza. RICHARD T. COTTON. 409 Opius fletcheri as a Parasite of the Melon Fly in Hawaii. H. F. WiUvARD 423 Tamarind Pod-Borer, Sitophilus linearis (Herbst). RICHARD T. COTTON 439 Influence of Temperature and Humidity on the Growth of Pseudomonas citri and Its Host Plants and on Infection and Development of the Disease. GEORGE L. PEI/HER 447 Daubentonia longifolia (Coffee Bean), A Poisonous Plant. C. DWIGHT MARSH and A. B. CI^AWSON 507 Fusarium-Wilt of Tobacco. JAMBS JOHNSON 515 Sugar Beet Top Silage. RAY E. NBIDIG 537 Nodule Bacteria of Leguminous Plants. F. LöHNIS and ROY PIANSBN 543 Correlation and Causation. SEWAU, WRIGHT 557 Measurement of the Amount of Water That Seeds Cause to Become Unfree and Their Water-Soluble Material. GEORGE; J. BOUYOU- cos and M. M. McCooi, 587 Inheritance of Syndactylism, Black, and Dilution in Swine. J. A. DETI.EFSEN and W. J. CARMICHAEL 595 Four Rhynchophora Attacking Com in Storage. RICHARD T. COTTON 605 Concentration of Potassium in Orthoclase Solutions Not a Measure of Its Availability to Wheat Seedlings. J. F. BREAZEALE and LYMAN J. BRIGGS 615 Composition of Tubers, Skins, and Sprouts of Three Varieties of Potatoes. F. C. COOK 623 Further Studies in the Deterioration of Sugars in Storage. NICHO- LAS KOPELOFF, H. Z. E. PERKINS, and C. J. WELCOME 637 Freezing of Fruit Buds. FRANK L. WEST and N. E. EDLEFSEN. . 655 Oct. i, i92a-Mar. is, 1921 Contents V

Effect of Various Crops Upon the Water Extract of a Typical Silty pafie Clay Loam Soil. G. R. STEWART and J. C. MARTIN 663 Another Conidial Sclerospora of Philippine Maize. WILUAM H. WESTON, Jr 669 Onion Smudge. J. C. WALKER 685 Variations in Colletotrichum gloeosporioides. O. F. BURGER 723 A Transmissible Mosaic Disease of Lettuce. IVAN C. J AGGER. . 737 Leconte's Sawfly, an Enemy of Young Pines. WIUJAM MIDDLE- 1 TON 74 Amylase of Rhizopus tritici, with a Consideration of Its Secretion and Action. L. L. HARTER 761 A Comparative Study of the Composition of the Sunflower and Corn Plants at Different Stages of Growth. R. H. SHAW and P. A. WRIGHT 787 Evaluation of Climatic Temperature Efficiency for the Ripening Processes in Sweetcorn. CHARLES O. APPLEMAN and S. V. EATON 795 Some Lepidoptera Likely to Be Confused with the Pink Boll worm. CARL HEINRICH 807 Biology of the Smartweed Borer, Pyrausta ainsliei Heinrich. GEORGE G. AINSLIE and W. B. CARTWRIGHT 837 Effect of X-Rays on Trichinae. BENJAMIN SCHWARTZ 845 Relation of the Calcium Content of Some Kansas Soils to the Soil Reaction as Determined by the Electrometric Titration. C. O. SWANSON, W. L. LATSHAW, and E. L. TAGUE 855 Green Feed versus Antiseptics as a Preventive of Intestinal Dis- orders of Growing Chicks. A. G. PHILIPS, R. H. CARR, and D. C. KENNARD 869 Comparative Utilization of the Mineral Constituents in the Coty- ledons of Bean Seedlings Grown in Soil and in Distilled Water. G. DAVIS BUCKNER 875 Sunflower Silage Digestion Experiment with Cattle and Sheep. RAY E. NEIDIG, C. W. HICKMAN, and ROBERT S. SNYDER 881 Index 889 ERRATA AND AUTHORS' EMENDATIONS

Page 9, line 23, "spikelet" should read "group." Page 16, line 36, " Triticum" should read " Agropyron. " Page 68, after line 22 insert "picture. " Page 84, last line, omit "Not seen. " Page 124, line 23, omit " 15. " Page 140, legend of Plate 15, omit " Late rosette stage of Chinese colza seedling. " Pages 166, 168,170, 175, 178, 180, and 181, Tables II, IV, VI, IX, XI, XIII, and XV, after column heading "ash" insert "expressed as percentages of dry matter. " Pages 183 and 184, Tables XVI, XVII, and XVIII, column 2, omit "per cent. " Page 193, line 16, "epidemic" should read "endemic." Page 200, line 23, "0.005" should read "0.0005." Page 236, footnote to Table XII, after "42 days" insert "and 60 days. " Page 246, line 23, after "apical portion" insert "of claval region. " Page 413, Table I, cloumn 10, footnote reference "e" should read " Í. " Page 414, Table I, column 6, footnote reference "o" should be transposed to column 7. Page 422, citation 4, omit "In press" and insert "no. 9, p. 235-243." Page 452, Table II, line 1, footnote reference "a" should be inserted before all entries. Page 479, line 32, "organism" should read "organisms. " Page 481, "26o" should read "25o." Page 491, "Table XVII" should read "Table XVIII." Page 508, Table I, column 3, lines 13 to 22, ".283" should read ".028. " Page607, line 13, "molas" should read "molar. " Page 614, Plate 72, figure E, and Plate 74, figure E, "ae" should read "al. " Page 810, line 25, " Kostclczkya" should read " Kostclctzkya. " Page 815, line 32, "divini" should read "diveni. " Page 816, line 18, "hessitans" should read "haesitans. " Page 822, line 38, " Kosteleyzkya" should read " Kosteletzkya. " Page 828, line 32, " Kostelelzkya" should read " Kosteletzkya. " (VI) ILLUSTRATIONS

FUSARIUM-BLIGHT (SCAB) OF WHEAT AND OTHER CEREALS

Text Figures Page i. Conidia of Gibberella saubinetii 16 2. Special culture tube for maintaining moisture in culture 18 Plates i. Gibberella saubinetii: Blighted ("scabbed") wheat heads 32 2. Gibberella saubinetii: A.—Footrot of wheat caused by Fusarium. B.— Seedling-blight of wheat caused by G. saubinetii 32 3. A.—Fusarium seedling-blight. B.—Tissue invaded by G. saubinetii in causing the headblight of wheat 32 4. Gibberella satibinetii: A.—Kernels blighted and shriveled by Fusarium- blight. B.—Perithecia development of G. saubinetii on an infected wheat head 32

CAUSE 01? LIME-INDUCED CHLOROSIS AND AVAILABILITY 01* IRON IN THE SOIL Plates 5. A.—Rice grown in calcareous and noncalcareous soils and sprayed with ferrous sulphate solution (experiment I). B.—^Apparatus used in growing plants in experiment VII 62 6. A.—Effect of carbonate of lime in depressing the availability of iron (experiment VII). B.—Effect of various substances on growth of rice in calcareous soil (experiment VIII) 62

A NEW AVOCADO WEEVIL FROM THE CANAL ZONE Plates 7. Heilipus perseae: A, B.—Adult, paratype. C.—An avocado fruit (re- duced) showing feeding injury by the beetles 116 8. Heilipus perseae: Leaves showing the injury done by five beetles in 48 hours 116 9. Heilipus perseae, mature larva: A.—Ventral face of ventral mouthparts. B.—Anterior part of head from above. C.—Lingua, hypopharynx, hypopharyngeal bracon, and dorsal (buccal) face of maxilla. D.—Dor- sal face of mandible. E.—Epipharynx. F.—Ventral face of mandible. G.—Head capsule from above. H.—Thoracic spiracle from outside. I.—Mature larva 116

STUDIES IN MUSTARD SEEDS AND SUBSTITUTES: I. CHINESE COLZA (BRAS- SICA CAMPESTRIS CHINOLEIFERA VIEHOEVER) Plates 10. A.—Yellow seed of Chinese colza. B.—Brown seed of Chinese colza. C.—Surface section of yellow seed of Chinese colza, showing lack of reticulations. D.—Surface section of brown seed of Chinese colza, showing reticulations. E.—Cross section of yellow seed of Chinese colza. F.—Cross section of brown seed of Chinese colza 140 (vu) VIII Journal of Agricultural Research voi.xx

Page ii. Seedling of Chinese colza, showing cotyledons and young leaves 140 12. Early rosette stage of Chinese colza seedling: A.—Plants from (1) brown seed and (2) yellow seeds. B.—Usual form, showing almost entire leaves 140 13. Early rosette stage of Chinese colza seedling: A.—Plant showing a variation in lobing of the leaves. Two months old. B.—Plant showing a variation in lobing of the leaves. Three months old 140 14. I,ate rosette stage of Chinese colza seedling: A.—Usual form. B.—Plant showing a variation in lobing of the leaves 140 15. A.—Pe-tsai. B.—Cross between Pak-choi and Pe-tsai. C.—Pak-choi 140 16. Early flowering stage of Chinese colza: A.—Usual form, showing somewhat enlarged stem base and stem-clasping leaves. B.—Plant without enlarged stem base. C.—Usual form, showing glaucous leaves 140 17. Early flowering stage of Chinese colza: A.—Usual form, showing luxuriant growth and long pedicels. B.—Flower cluster 140 18. A.—Fruiting stage of Chinese colza. B.—Mature fruit of Chinese colza... 140 19. A.—Herbarium specimen of Brassica chinensis L. B.—Herbarium specimen of Brassica campestris 140

THE INFLUENCE OF COLD IN STIMULATING THE GROWTH OF PLANTS

Plates 20. A.—Blueberry plants, Vaccinium corymbosum, made dormant without cold. B.—Chilled and unchilled blueberry plants 160 21. A.—Chilled and unchilled plants of grouseberry, Viburnum americanum. B.—Chilled and unchilled plants of tamarack, Larix laricina 160 22. A.—Chilled and unchilled plants of wild crab, Malus coronaria. B.— Blueberry plant with one branch stimulated to growth by cold 160 23. Blueberry plant with one branch kept dormant by heat. A.—Dormant indoor blueberry plant as it appeared on February 15, 1912. B.—Same plant photographed May 21 160 24. A.—Blueberry cuttings starting to grow at 36o F. B.—Blueberry plant growing in the dark at 36o F 160 25. A.—Dormant wild crab stimulated to growth by pruning. B.—Dormant wild crabs stimulated to growth by girdling and by notching the stem . . 160 26. A.—Dormant blueberry buds stimulated to growth by chalking the stem. B.—Dormant blueberry bud stimulated to growth by rubbing the stem . 160 27. A.—Normal spring growth on a blueberry stem. B.—Abnormal spring growth on a blueberry stem, due to lack of chilling 160 28. Blueberry leaf exuding sugar from glands interpreted as osmotic-pressure safety valves 160 29. A plant of bunchberry, Cornus canadensis, the seeds of which do not germi- nate without chilling 160 30. A.—Trailing arbutus, Epigaea repens, flowering sparingly from lack of chilling. B.—Trailing arbutus plant flowering normally after chilling. C.— Blueberry plant forced into flower in September by artificial chilling. . 160 31' A.—^Abnormal growth of an unchilled blueberry plant. B.—Awakening of long dormant plants by artificial chilling 160 32. Plants brought out of dormancy at a specified time. A.—Blueberry plants from a lot that had been kept in a dormant condition by warmth for nearly a year. B.—Representative plants from each of the two chilled lots described under A, from photograph made January 18, 1918 160 Oct. i, 1920-Mar. 15,192! Illustrations IX

33. A.—Plantation at Whitesbog, N. J., for the testing of blueberry hybrids. PaRc B.—Four-year-old blueberry hybrid in full fruit 160 34. The ordinary wild blueberry of New Jersey 160 35. Fruit of a selected hybrid blueberry 160

INJURY TO SEED WHEAT RESULTING FROM DRYING AFTER DISINFECTION WITH FORMALDEHYDE

Text Figures 1. Graph showing rate of evaporation of paraformaldehyde at room temperature, approximately 20o C 222 2. Graph showing the relation of humidity of the air to percentage of germination of stored seed in first experiment 226 3. Graph showing the relation of humidity of the air to percentage of germination of stored seed in second experiment 228 4. Graph showing the relation between humidity of the air and seed in jury- as indicated by rate of growth of germinated seedlings 229 5. Graph showing the diminution in the rate of evaporation of paraformaldehyde inclosed in a desiccator of 2,400-cc. volume 232

Plates 36. A.—Post-treatment seed injury occurring when wheat is dried after treatment with a 0.1 per cent solution. B.—Germinating seedlings of Little Club wheat, showing characteristic post-treatment injury when seed is treated with a o. 1 per cent solution 244 37. A.—Pots showing germination of treated seed stored for 32 days after disinfection with a 0.1 per cent solution of formaldehyde. B.—Wheat plants grown in soil from seed stored for 60 days after disinfection with a o. 1 per cent solution of formaldehyde 244 38. A.—Wheat seedlings showing injury produced by allowing the seed to lie in dry soil for 30 days after treatment with a 0.1 per cent solution of formaldehyde. B.—Desiccators with different degrees of atmospheric humidity obtained by the use of mixtures of sulphuric acid and water in diiTerent proportions 244 39. Germinating samples of wheat stored for 35 days after treatment in the desiccators shown in Plate 38 B, illustrating the relation of seed injury to humidity 224 40. Varying injury to wheat treated with a 0.1 per cent solution of formaldehyde, and stored in sealed bottles. A.—Sealed immediately after treatment, 100 per cent germination. B.—Sealed after drying 7 hours, spread on towels in laboratory, no germination. C.—Sealed after drying 24 hours, spread on towels in laboratory, no germination. D.—Sealed after drying 3 days, spread on towels in laboratory, 14 per cent germination 244 41. Germinating wheat kernels, showing the prevention of post-treatment injury by washing the seed with water immediately after treatment. A.—Treated with 0.2 per cent solution, which was not washed off before drying, 32 per cent germination. B.—Treated with 0.2 per cent solution which was washed off before drying, 76 per cent germination. C.— Treated with 0.1 per cent solution, which was not washed off before drying, 52 per cent germination. D.—Treated with 0.1 per cent solution, which was washed off before drying, 74 per cent germination 244 29GG70—21 2 x Journal of Agricultural Research voi.xx

STUDIES ON nm Li$n HISTORY AND HABITS OF Tim BEET LEAKHOPPER Plates 42. Eutettix tenella: A.—Adult, light form. B.—Adult, dark form. C—Adult, color gradation between A and B. D.—Nymph with protruding sac of page dryinid parasite 252 43. Parasites of Eutettix tenella: A.—Pipunculus induslrius: Adult, much enlarged. B.—Polynema eutetlixi: Adult, much enlarged 252

HYPERTROPHIED LENTICELS ON THE ROOTS OF CONIFERS AND THEIR RELATION TO MOISTURE AND AERATION

Plates 44. Section through a hypertrophied lenticel on root of Pinus rígida growing in swampy situation 266 45. A.—Hypertrophied lenticels on the basal part of layering stein of Picea mariana, which had been covered with sphagnum. B.—Tap root of a Pinus ponderosa transplant, bearing an unusually large number of hypertrophied lenticels 266 46. A.—Cross section of the stem through one of the hypertrophied lenticels shown in C. B.—Large patches of excrescences upon the tap root near the root crown, on Pinus rigida. C.—Hypertrophied lenticels on root of 5-months-old Pinus ponderosa, grown in a loosely stoppered 2-oimce bottle, in tap water which had not been changed since the germination of the seed 265

CROWNWART OF ALFALFA CAUSED BY UROPIILYCTIS ALFALFAE

Plates 47. Urophlyctis alfalfae: Drawing of alfalfa plant, showing abundance of crownwart, as found early in May, 1919, in northern California 324 48. Urophlyctis alfalfae: A-D.—Peripheral portions of actively growing thallus of parasite dissected from living host. E.—Nearly mature resting spore viewed from distil side, showing 11 haustoria in zonate arrangement. F.—Mature resting spore viewed from distil pole, showing 13 pits that mark former location of haustoria. G.—Mature resting spore viewed in profile, showing pits in zonate arrangement and light concavity on proximal side of spore 324 49. Urophlyctis alfalfae: A.—Section of epidermal region of young foliar structures, showing young primary turbinate cells ta-tg, the first products of infection, within epidermal cells. B.—Section of young foliar element, showing wall of invaded epidermal cell disrupted and advance of second- ary turbinate cells tbc-tbe into underlying tissue. C.—Section of turbinate cell, showing 3 evacuated peripheral segments pa-pc. D.—Sec- tion of maturing resting spore, showing 8 nuclei and a central vacuole containing 4 granules staining red. E.—Section of mature resting spore, showing numerous red-staining granules in center and 5 nuclei. 1<\— Section of maturing resting spore, showing 11 normal nuclei and 4 enlarged nuclei in center, tlie latter apparently degenerating 324 50. Urophlyctis alfalfae: Section of diseased bud scale of alfalfa, showing four coalescing cavities, in three of which the large primary turbinate cells taa, tba, and tc may be distinguished 324 51. Urophlyctis alfalfae: Section of diseased bud scale attacked by U. alfalfae, showing a group of eight well-developed cavities a-h and their relation to the host tissue 324 Oct. i, 1920-Mar. 15,1921 Illustrations XI

52. A, C, D.—Urophlyctis pluriannulatus. B.—Urophlyctis alfalfae. A.— Portion of actively growing thallus of U. pluriannulatus dissected from gall on leaf of Sanícula menziesii, including a turbinate cell ta with a nearly mature resting spore ra. B.—Abnormally enlarged hyphae and turbinate cells of U. alfalfae, showing conspicuous thickening of the walls. C.—Peripheral portion of actively growing thallus of U. pluriannulatus, similar to A, showing 8 turbinate cells of the second order, of which 7 have produced turbinate cells of the last order as well as resting spores. D.—Nearly mature resting spore of U. pluriannulatus, rage viewed from polar end, showing 22 haustoria in zonate arrangement. .. . 324 53. Urophlyctis pluriannulatis: Section of leaf of Sanictila menziesii, showing development of parasite within gall 324 54. Crowns of alfalfa plants bearing galls caused by Urophlyctis alfalfae photographed at different stages of development. A.—A comparatively early stage of development at which the origin of the gall structures from the elements of developing buds can be traced. B.—A later stage of development at which the origin of the tissue has become obscured 324 55. A comparatively early stage of host reaction to invasion by Urophlyctis alfalfae 324 56. A.—Late stage of development of host reaction to the invasion of Urophlyctis alfalfae. B.—Vertical section through a well-developed gall near its central axis, showing its laminated structure arising from the thickening of bud elements 324

PATHOLOGICAL ANATOMY OF POTATO BLACKLEG

Text Figure

1. Section of potato leaf, showing distribution of protein crystals 329 Plates 57. A.—Plant affected with blackleg. B.—Section of single upper epidermal cell of leaf and adjacent palisade cell. C.—Section of pith cell which is transformed into a sclereid adjacent to phloem fibers 330 58. A.—Pith cells of petiole transformed into sclereids with typically stratified walls. B.—Vascular tissue of the petiole greatly increased by blackleg. . 330

SCLEROTINIA MINOR, N. SP., THE CAUSE OF A DECAY OF LETTUCE, CELERY, AND OTHER CROPS Text Figure 1. Camera lucida drawings of 5". minor: A, Microconidia and conodiophores; B, Ascospores; C, Germinating ascospores; D, Asci and paraphyses 332 Plate 59. A.—Sclerotia on hard potato agar: center, Scleroiina libcrtiana, either end, S. minor. B.—Apothecia of 5". libertiana. C.—Apotheeia of S. minor. . 334

RELATION OF THE SOIL SOLUTION TO THE Son, EXTRACT Text Figures 1. Graph showing relation of freezing-point depressions in soil (calculated to 22 per cent moisture) to total solids extracted by 5 parts of water to 1 of soil 382 XII Journal of Agricultural Research voi.xx

2. Graph showing relation of freezing-point depressions in soil (calculated to 17 per cent moisture) to total solids extracted by 5 parts of water to 1 of rage soil 383

EFFECT OF SEASON AND CROP GROWTH ON THE PHYSICAL STATE OF THE SOIL

Text Figures

1. Effect of crop on physical state and electrolyte concentration of the water extract of the soil 398 2. Effect of crop on physical state and electrolyte concentration of the water extract of the soil 399 3. Effect of crop on physical state and electrolyte concentration of the wTater extract of the soil 400 4. Effect of crop on physical state and electrolyte concentration of the water extract of the soil 401

RICE WEEVIL, (CALANDRA) SITOPIIILUS ORYZA

Plate 60. Sitopiiilus oryza: A.—Egg. B.—Pupa, dorsal aspect. C.—Pupa, lateral aspect. D.—Pupa, ventral aspect. E.—Adult. F.—Third-stage larva. G.—First-stage larva. H.—Second-stage larva. I.—Fourth-stage larva. 422

OPIUS FLETCHERI AS A PARASITE OF THE MELON FLY IN HAWAII

Text Figures 1. Opius fletcheri: Egg just deposited 424 2. Opius fletcheri: Mature egg 424 3. Opius fletcheri: Larva, first instar, ventral aspect, showing head characters and complete trachea! system, and the egg scrosal cells 425 4. Opius fletcheri: Molted skin of first-instar larva, showing the absence of egg serosal cells 426 5. Opius fletclieri: New second-instar larva 427 6. Opius fletcheri: Mandible of second-instar larva 427 7. Opius fletcheri: Mandible of third-instar larva 427 8. Opius fletcheri: Larva, fourth instar, lateral aspect, showing general outline and spiracles 428 9. Opius fletcheri: Spines on body of mature larva 428 10. Opius fletclieri: Mandible of fourth-instar larva 429 11. Opius fletcheri: Head of mature larva, dorso-cephalic aspect 429 12. Opius fletcheri: Pupa, female 430 13. Opius fletcheri: Adult female 431

TAMARIND POD-BORER, SITOPIIILUS LINEARIS (HERBST)

Plate 61. Sitopiiilus linearis: A.—Pupa, dorsal view. B.—Pupa, front view. C—Egg. B.—Mandible. E.—Mature larva. F.—Ventral view of head. G.—Clypeus and labrum. H.—Pupa, lateral view. I.—Head, face view. J.—Head, dorsal view. K.—Head, lateral view 446 Oct. i, 1920-Mar. 15,1921 Illustrations xm

INFIVUENCU OK TEMPERATURE AND HUMIDITY ON THE GROWTH OF PSEUDO- MONAS CITRI AND ITS HOST PLANTS AND ON INFECTION AND DEVELOPMENT OF THE DISEASE Text Figure 1. Graph showing the rate of enzym action, as expressed in millimeters, at the page various temperatures for a period of eight days on soluble starch agar... 451

DAUBENTONIA LONGIFOLIA (CoFFEE BEAN), A POISONOUS PLANT Plate 62. Herbarium specimen of Daubentonia longifolia, showing flowers, leaves, and pods 514

FuSARIUM-WlLT OF TOBACCO Text Figure 1. Camera-lucida drawings of spore forms of Fusarium oxysporum var. nicotianae, n. var.: A, macroconidia; B, microconidia; C, chlamydospores; D, coni- diophore of the sporodochial stage 521

Plates 63. A.—A typical spot in a field of Maryland Broadleaf tobacco infested with Fusarium-wilt. Benedict, Md. 1916. B.—Uninoculated control. C.—Plants grown in soil artificially inoculated with the tobacco-wilt Fusarium and planted to White Burley 536 64. A.—Plant infected with Fusarium-wilt, showing wilting in vertical line on stalk. B.—Last stages of Fusarium-wilt in Maryland Broadleaf tobacco 536 65. A.—Result of plating out five pieces of infected vascular tissue from infected plant, illustrating character of growth of mycelium on potato agar. B.—Stem and midrib of plant, cut longitudinally to show the blackened vascular system 536 66. A.—Cross sections through vascular system of tobacco plant infected with Fusarium-wilt, showing the fungus mycelium in the vessels. B.—Longi- tudinal sections through the vascular system of plants infected with Fusarium-wilt, showing the fungus strands in the vessels 536 67. I.—Plants illustrating the influence of soil temperature on degree of wilting of plants in soil infested with Fusarium-wilt. II.—Plants grown in the same soil uninfested and at corresponding soil temperatures. III.—Plants illustrating the influence of varying soil reaction on the amount of Fusarium-wilt in infested soil. IV.—Plants illustrating varietal differences in resistance of tobacco to Fusarium-wilt 536

NODULE BACTERIA OF LEGUMINOUS PLANTS Plates 68. A.—Soybean bacteria, J. K. Wilson's strain, 4 days old. B.—Vetch bacteria, 3 days old. C.—Bacillus radiobacter, 2 days old. D.—Soybean bacteria, beef agar, 4 days old. E.—Red clover bacteria, beef agar, 4 days old. F.—Bacillus radiobacter, beef agar, 4 days old. G.—Cowpea bacteria, potato, 6 days old. H.—Red clover bacteria, potato, 14 days old. I.—B. radiobacter, milk, 7 days old. J.—Cowpea bacteria, mannite-nitrate agar, 8 days old. K.—Vetch bacteria, mannite-nitrate agar, 8 days old. L.—B. radiobacter, mannite-ni trate solution, 17 days old 556 xiv Journal of Agricultural Research voi.xx

69. A.—Mannite-nitrate agar slants, 8 days old, from left to right: soybean bacteria, vetch bacteria, and Bacillus radiobacter. B.—Growth in milk, 4 weeks old, from left to right: soybean bacteria, vetch bacteria, and B. radiobacter. C.—Growth on potato, 2 weeks old: vetch bacteria (left) page and B. radiobacter (right) 556

CORRELATION AND CAUSATION Text Figures 1. Diagram illustrating the interrelations among the factors which determine the weight of guinea pigs at birth and at weaning (33 days) 560 2. Diagram showing relations between two variables, X and Y, whose values are determined in part by common causes, B, C, and D, which are in- dependent of each other 565 3. Diagram showing relations between two variables, X and Y, whose values are completely determined by common causes, B and C, which are in- dependent of each other 565 4. A system in which the value of variable X is completely determined by causes M and N, which are correlated with each other 566 5. A system in which the value of X is affected by a factor, B, along two different paths, BMX and BNX 567 6. Diagram showing relations between two variables, X and Y, whose values are determined in part by common causes, M and N, which are correlated with each other 568 7. Simplified diagram of factors which determine birth weight in guinea pigs. 568 8. Path coefficients measuring the relations between birth rate (X), rate of growth (Q), gestation period (P), size of litter (L,), and other causes (A, C). 570 9. Coefficients of determination. Symbols as in figure 7 570 10. Effect and one known cause 571 11. Effect and two correlated known causes 571 12. Effect and three correlated known causes 571 13. Effect and four correlated known causes 572 14. Relations between wet-bulb depression (B), wind velocity (W), radia- tion (R), and temperature (T) as assumed for direct analysis 576 15. Relations between factors of figure 14 and absolute humidity (H) expressing causal relations better than figure 14 but adapted only to indirect analysis. 579 16. Relations between evaporations or transpiration (X) and the system shown in figure 15 582

INHERITANCE 01? SYNDACTYLISM, BLACK, AND DILUTION IN SWINE Plate 70. The four types of F2 segregates from a cross between mule-foot boar and Duroc-Jersey sows. A.—Black mule-foot. B.—Black cloven foot. C.—Red mule-foot. D.—Red cloven foot 604

FOUR RHYNCHOPHORA ATTACKING CORN IN STORAGE Plates 71. Araecerus fasciculatus. A.—Pupa, dorsal view. B.—Pupa, front view. C.—Egg. D.—Mandible. E.—Mature larva. F.—Ventral view of head. G.—Labium and clypeus. H.—Pupa, lateral view. I.—Head, face view. J.—Head, dorsal view. K.—Head, lateral view 614 Oct. i, 1920-Mar. 15, 1921 Illustrations XV

72. Caulophilus latinasus: A.—Pupa, dorsal view. B.—Pupa, front view. C.—Egg. D.—Mandible. E.—Mature larva. F.—Ventral view of head. G.—Labium and clypeus. H.—Pupa, lateral view. I.—Head, page face view. J.—Head, dorsal view. K.—Head, lateral view 614 73. Sitophilus oryza: A.—Pupa, dorsal view. B.—Pupa, front view. C.— Egg. D.—Mandible. E.—Mature larva. F.—Ventral view of head. G.—Labium and clypeus. H.—Pupa, lateral view. I.—Head, face view. J.—Head, dorsal view. K.—Head, lateral view 614 74. Sitophilus granarius: A.—Pupa, dorsal view. B.—Pupa, front view. C.—Egg. D.—Mandible. E.—Mature larva. F.—Ventral view of head. G.—Labium and clypeus. H.—Pupa, lateral view. I.—Head, face view. J.—Head, dorsal view. K.—Head, lateral view 614

FREEZING OP FRUIT BUDS

Plate 75. Apparatus for freezing entire tree 662

EFFECT OF VARIOUS CROPS UPON THE WATER EXTRACT OF A TYPICAL SILT Y CLAY LOAM SOIL

Text Figures

1. Decrease of water-soluble nutrients from the growth of various crops, as shown by increases in specific resistance 664 2. Decrease of water-soluble nutrients from varying numbers of barley plants, as shown by increase in specific resistance 664 3. Decrease of water-soluble nitrates from the growth of various crops. (Graphs =K NO3.) 665 4. Decrease of water-soluble nitrates from varying numbers of barley plants. (Graphs=X NO3.) 666 5. Decrease in the concentration of soil solution shown by freezing-point depression 666

ANOTHER CONIDIAL SCLEROSPORA OF PHILIPPINE MAIZE

Text Figure 1. Comparison of the sizes of 700 conidia of Sclcrospora s pont anea with 700 conidia of S. philippinensis; A, variation of conidia in length; B, variation of conidia in diameter; C, ratios of length to width of conidia arranged in classes 675

Plates 76. Corner of a native-grown maize plot in the interior uplands of Cebu 684 77. A.—Clump of Saccharum spontaneum, showing characteristic size and habit of healthy plants under natural conditions. B.—Clump of Sac- charum spontaneum infected with Sclerospora spontanea 684 78. A.—A young seedling (3 weeks old) of Saccharum spontaneum infected with Sclerospora spontanea. B.—Conidiophores on the leaf of Saccharum spontaneum. C.—Young shoots of Saccharum spontaneum arising after the primary stalk had been cut, and like it severely infected with Sclero- spora spontanea 684 XVI Journal of Agricultural Research voi.xx

79. A.—Typical conidiopliore, showing characteristically long, slender, un- knobbed basal cell, relatively short main axis with its greatest diameter about midway to the primary branches, and fairly well-developed branch system bearing long, slender conidia. B.—Upper portion of a conidiopliore which has a poorly developed branch system and heute bears few conidia on sterigmata which are relatively large. C.—Portion of the branch system of a conidiopliore, showing the conidia germinating while still attached to their sterigmata. 1").—Stalk portion of a typical conidiopliore, showing long, slender, tmknobbed basal cell, and main axis which is slender above the septum, expands rapidly to its greatest diameter about midway, and contracts again below the branches. E, F.—Typical basal cells of conidiophores. G.—Stalk portion of a conidiopliore with basal cell which, though unusually short, nevertheless is longer than the extent of the main axis from septum to primary branches. H.—Typical stalk portion of a conidiopliore from sugar cane. I, J, K.—Typical conidia showing variations in size and shape and method of germination page by hyphae 684

ONION SMUDGE;

Text Figures

1. Conidia and appressoria of Colletolrichum circinans 689 2. Acervulus of Colletolrichum circinans on artificially inoculated onion scale . 690 3. Spores of Colletolrichumfructus {A) and C. circinans (B) 694 4. Relation of temperature to growth of Co lletotrichum circinaTu on agar plates. 697 5. Relation of temperature to spore germination of Colletotriclmvi circiiians. . . 698 6. Co lletotrichum circinans: Stage of penetration of epidermal cell of onion scale at 66 hours after inoculation 702 7. Cross section of epidermis, showing early stage of penetration by Colletolri- chum circinans 703 8. Cross section of epidennis (^4 ) and underlying parenchyma cells (D) of onion scale inoculated with a suspension of Colletolrichum circinans spores and kept in a moist chamber at room temperature 704 9. Cross section of onion scale naturally infected \vitli Co lletotrichum circinans, showing the mycelium developing first just beneath the cuticle and later penetrating the subcuticular wall 705 10. Chart from data collected at Racine, Wis., during 1915 and 1916, showing the daily mean soil temperature at a depth of 1 to 2 inches, and the rainfall. 708

Plates

So. Onion smudge: Onion sets (White Portugal variety) naturally infected with Co lletotrichum circinans 722 81. Onion smudge: A, B, E, D.—Advanced stages of smudge after several months in storage. C.—Bulb inoculated in a moist chamber with a suspension of Co lletotrichum circinans conidia. F, G.—Macros porium sp. on outer scale of white onion sets. H.—M. porrum and Phoma alliicola on outer scale of white onion set 722 82. Relation of soil temperature to the development of smudge 722 83. Colletotrichum circinans and C. fructus: A.—Photomicrograph of cross section of naturally infected onion scale. B.—Photomicrograph of cross section of an infected onion scale held for several months in poorly ventilated storage. C, D.—Photomicrographs of cross sections of C. circinans (C) and C. frutus (D) on apple fruit 722 Oct. if i92Cr-Mar. is, 1921 Illustrations xvii

84. ColletotricJmm frucius and C. circinans: A.—Dilution plate from spores of Colletotrichum fruchu. B.—Individual colony of C. fnidus on potato agar. C.—Apple of Fameuse variety inoculated with mycelium from pure culture of C. circinans. D.—Dilution plate from spores of C. cir- page cinans. E.—Individual colony of C. circinans on potato agar 722 85. Relation of curing conditions to the development of smudge: A, B.—Com- parison of onion sets artificially dried immediately after harvest with those not dried. C, D.—Comparison of white onion sets cured in shal- low crates in the field under the best of natural conditions with part of the same lot after exposure to moist conditions for one week 722

VARIATIONS IN COIXETOTRICHUM GLOEOSPORIOIDES

Plate 86. A, B.—Variation occurring in strain 990. The cultures were not made from a single spore. C.—^Variation occurring in a culture of strain 990 which was made from a single spore 736 Text Figures 1. Variability of strains of Colletotrichum gloeosporioides in spore length 728 2. I, culture 510: A, greenish black mycelium; B, white mycelium. II, culture 943: A, black mycelium; B, white mycelium; C, mycelium mostly in medium, growth zoned, abundant spore production. Ill, culture 495: A, black mycelium; B, gray mycelium; C, white mycelium. IV, culture 527: A, gray mycelium; B, greenish black mycelium; C, white mycelium; D, black mycelium. V, culture 940: A, greenish black mycelium; B, white mycelium, some greenish concentric circles; C, black mycelium; D, white mycelium; E, white and black mixed 734

A TRANSMISSIBLE MOSAIC DISEASE OF LETTUCE Plate 87. A.—Leaves of Romaine lettuce. B.—Young expanding leaves of head lettuce from experiment started March 22 740

LECONTE'S SAWFLY, AN ENEMY OF YOUNG PINES

Text Figures 1. Chart showing life and seasonal history of Neodiprion lecontei through the active period of three years (November to March omitted, the insect being in the cocoon during this period) 751 2. Position of end of abdomen of female when ovipositing, showing the various parts and their position: 1, lance; 2, apical part of sheath; 3, basal part of sheath; 4, nates or ninth tergite; 5, eighth stemite; 6, chitinized rods at base of lancet; 7, lancet 755 3. Distribution of Neodiprion lecontei. The larger dots indicate places from which specimens have actually been received 759 Plates 88. Neodiprion lecontei: A.—Adult female. B.—Adult male 760 89. Neodiprion lecontei: A.—Larva. B.—Sixth-stage larva: The riiuscles of a single abdominal segment distributed over several segments to show their numbers, position, and attachment 760 29GG70—21 3 xviii Journal of Agricultural Research voi.xx go. Neodiprion lecontei: Sixtli-stage larva. A.—Front view of head. B.— Ventral (or apical) view of head capsule. C.—Front view of head capsule. D.—Lateral view of head. E.—Sagittal section of head. F.— Antenna. G.—Frons, adfrons, and clypeus. H.—Mandibles. I.— Epipharynx and labrum. J.—Internal view of hypopharynx maxillae, and labium. K.—External view of maxillae, and labium. E-—Exter- nal view of maxillae. M.—Interior and apical view of maxilla. N.— page End view of maxilla. 0.—End view of labium 760 91. Neodiprion lecontei: Sixth-stage larva. A.—External view of the thorax. B.—External view of the second and third abdominal segments. C.— External view of the ninth and tenth abdominal segments. D.—In- ternal view of thoracic skin. E.—Internal view of the skin of the second and third abdominal segments. F.—Diagrammatic cross section of the abdomen showing the longitudinal areas of the body on its transverse circumference 760 92. Neodiprion lecontei: A.—Some defoliated twigs showing feeding on bark of stem. B.—Eggs within needles of Pinus virginiana 760

EVALUATION OF CUMATIC TEMPERATURIO EFFICIENCY FOR THE RIPENING PROC- ESSES IN SWEETCORN Text Figure 1. Comparison of early and late crops of sweet com in respect to changes in percentage composition in equal lengths of time 798

SOME EEPIDOPTERA LIKELY TO BE CONFUSED WITH THE PINK BOLL WORM

Plates 93. Male genitalia (Gelechiidae) : A.—Gelechia trophella: Posterior part of tegumen, showing uncus and gnathos, ventral view. B.—G. trophella: Lateral view of male genitalia with eighth abdominal segment attached. C—G. hibiscella: Lateral view of male genitalia with eighth abodminal segment attached 836 94. Male genitalia (Gelechiidae): A.—Telphusa mariona (type): Lateral view of male genitalia. B.—T. mariona (type): Posterior part of tegumen, showing imcus, ventral view. C—Gelechia neoirophella (type): Aedoea- gus and penis. D.—G. neotrophclla (type) : Lateral view of male genitalia with aedoeagus and eighth segment removed. E.—G. neoirophella (type): Posterior part of tegumen, showing uncus and gnathos, ventral view. F.—G. neo trophella (typo.): Posterior half of harpes, ventral view. G.—G. neoirophella (type) : Stemite and tergite of modified eighth abdominal segment 836 95. Male genitalia (Gelechiidae, Stenomidae, and Oecophoridae): A.—Iso- phrictis similiella: Ventral view of male genitalia, spread. B.—Aede- moses haesitans: Ventral view of male genitalia, spread. C—A. haesi- ians: Enlargement of typical split hair on cucullus. D.—Borkhansenia fasciata: Ventro-lateral view of male genitalia, spread, showing a sym- metrical armlike projections from gnathos and costa of harpes 836 96. Male genitalia (Oecophoridae): A.—Borkhansenia minutella: Aedoeagus. B.—B. minutella: Ventral view of male genitalia, spread, aedoeagus omitted. C.—B. diveni (type): Ventral view of male genitalia, spread. D.—B. diveni (type): Dorsal view of an abdominal segment showing spinose condition of abdomen. E.—B. diveni (type) : Modified tergite of eighth abdominal segment. F.—B. diveni (type): Modified sternitc of eighth abdominal segment 836 Oct. i, 1920-Mar. 15,1921 Illustrations xix

97. Male genitalia (Oecoplioridae): A.—Borkhausenia conia: Portion of tergite of seventh abdominal segment, showing spinose and chitinized character of caudal margin. B.—D. conia: Ventral view of male genitalia, spread, aedoeagns omitted. C.—D. conia: Aedoeagus. D.—B. conia: Modified tergite of eighth abdominal segment. E.—B. conia: Modified sternite page of eighth abdominal segment 836 98. Malegenitalia (Blastobasidae): A.—Zenodochium citricolella: Aedoeagus. B.—Z. citricolella: Lateral view of male genitalia, right harpe and aedoeagus omitted. C.—Z. citricolella: Right harpe. D.—Holcocera ochrocc- phala: Ventral view of male genitalia, spread, aedoeagus omitted. E.— H. ochrocephala: Dorsum of an abdominal segment showing transverse row of spines. F.—//. ochrocephala: Aedoeagus and penis 836 99. Male genitalia (Olethreutidae and Blastobasidae): A.—Crocidosema pie- beiana: Ventral view of male genitalia, spread. B.—Encosma discrcti- vana (type): Ventral view of male genitalia, spread. C.—Holcocera confamulella (type): Ventral view of male genitalia, spread 836 100. Male genitalia (Phaloniidae and Pryalidae): A.—Phalonia ccphalanthana (type): Ventral view of male genitalia, spread. B.—Homoeosoma clec- tellum: Ventral view of male genitalia, spread 836 101. Lar val structures : A.—Pectinophoragossypiella: Head capsule, dorsal view, showing arrangement of setœ. B.—P. gossypiella: Head capsule, lateral view, showing arrangement of setae. C.—Dicymolomia julianalis: Head capsule, dorsal view, showing arrangement of setae. D.—D. julianalis: Head capsule, lateral view, showing arrangement of setae. E.—Meskea dysp ter aria: Head capsule, dorsal view, showing arrangement of setae. F.—M. dyspteraria: Head capsule, lateral view, showing arrangement of setae 836 102. Larval structures: A.—Pyroderces rileyi: Head capsule, dorsal view, showing arrangement of setae. B.—P. rileyi: Head capsule, lateral view, showing arrangement of setae. C.—Crocidosema plebeiana: Head capsule, dorsal view, showing arrangement of setae. D.—C. plebeiana: Head capsule, lateral view, showing arrangement of setae. E..—Z. enodochium citricolella: Labium and maxillae. F.—Isophrictis similiella: Head capsule, dorsal view, showing arrangement of setae 836 103. Larval structures: A.—Pectinophora gossypiella: Setal maps of first and second thoracic and third, eighth, and ninth abdominal segments. B.— Dicymolomia julianalis: Setal maps of first and second thoracic and third, eighth, and ninth abdominal segments. C.—Pyroderces rileyi: Setal maps of first thoracic and eighth and ninth abdominal segments. D.— Heliothis obsoleta: Setal maps of first thoracic and third abdominal segments. E.—Crocidosema plebeiana: Setal maps of first and second thoracic and third, eighth, and ninth abdominal segments 836 104. Larval structures: A.—Plalynota rostrana: Setal maps of first and second thoracic and third, eighth, and ninth abdominal segments. B.—Meskea dyspteraria: Setal maps of first and second thoracic and third, eighth, and ninth abdominal segments. C.—Z. enodochium citricolella: Setal maps of first thoracic and third, eighth, and ninth abdominal segments. D.—Aedemoscs haesitans: Setal map of third abdominal segment. E.— Moodna estrinella: Setal maps of second thoracic and eighth and ninth abdominal segments 836 XX Journal of Agricultural Research voi.xx

105. Larval structures: A.—Platynota rostrana: Setal maps of eighth and ninth abdominal segments, dorsal view. B.—Eucosma helianthana: Setal maps of eighth and ninth abdominal segments, dorsal view. C.—Pectinophora gossypiclla: Setal maps of eighth and ninth abdominal segments, dorsal view. D.—Pyroderces rileyi: Setal maps of eighth snd ninth abdominal segments, dorsal view. B.—Pectinophora gossypiella: Prothorax, ventral view, showing position of legs. F.—Telphusa mariona: Ventro-caudal view of tenth abdominal segment, showing anal fork. G.—Crocidosema plebeiana: Ventro-caudal view of tenth abdominal segment, showing anal fork. H.—Gelechia neotrophella: Ventro-caudal view of tenth abdominal segment, showing anal fork. I.—Zenodochium ciiricolella: Page Pro thorax, ventral view, showing position of legs 836 106. Larval structures: A.—Pectinophora gossypiella: Crochet arrangement of abdominal prolegs. B.—Crocidosema plebeiana: Crochet arrangement of abdominal prolegs. C.—Pyroderces rileyi: Crochet arrangement of abdominal prolegs. D.—Dicymolomia julianalis: Crochet arrangement of abdominal proleg. K.—Helio this obsoleta: Crochet arrangement of abdominal proleg 836 107. Pupal structures: A.—Pectinophora gossypiella: Ventral view of pupa. B.—Pectinophora gossypiella: Caudal end of pupa, lateral view. C.— Pectinophora gossypiella: Mature pupa, ventral view, shaded to show eyes of imago visible through pupal skin and characteristic pubescence of the pupa. D.—Pectinophora gossypiella: Dorsal view of pupa. H.— Pyroderces rileyi: Ventral view of pupa. F.—Pyroderces rileyi: Dorsal view of pupa 836 108. Pupal structures: A.—Crocidoseñna plebeiana: Abdomen of female pupa, ventral view. B.—C. plebeiana: Abdomen of male pupa, ventral view. C.—C. plebeiana: Lateral view of an abdominal segment, showing arrangement and character of dorsal spines; one spine greatly enlarged to show shape. D.—C. plebeiana: Abdomen of pupa, dorsal view. E.— Dicymolomia julianalis: Dorsal view of pupa. F.—D. julianalis: Caudal end of pupa, lateral view. G.—D. julianalis: Caudal end of male pupa, ventral view. H. D. julianalis: Ventral view of female pupa 836 109. Pupal structures: A.—Meskea dyspteraria: Caudal end of female pupa, lateral view. B.—M. dyspteraria: Abdomen of female pupa, ventral view. C.—M. dyspteraria: Male pupa, dorsal view. D.—M. dyspteraria: Caudal end of male pupa, lateral view. E.—M. dyspteraria: Male pupa, ventral view. F.—Amorbia emigratella: Abdomen of pupa, dorsal view. G.—Telphusa mariona: Caudal end of pupa, ventral view, showing peculiarly scalloped and fringed caudal margin of seventh abdominal segment 836 INDEX

Pase Page Abbclia subßava, parasite oí Eutettix tenella... 250 Adomoniga demyhis, parasite of Neodiprion Abics— lecontei 757-758 balsamea, hypertrophiée! lenticels 255-266 Aedevioses haesitans, similarity to Pectino- grandis, hypertrophiée! lenticels 255 Phora gossypiella 816-817 Abutilón— Aegeriidae, similarity oí one species to Pecli- berlandieri, food plant oí— nophora gossypiella 826-827 Meskea thyridinae 828-829 Aeration, relation to hypertrophied lenticels Telephusa mariona 812 on the roots of conifers 253-266 incanum, iood plant oí— Aerobic bacilli in canned ripe olives 377-379 Meskea thyridinae 828-829 Age, effect on composition of potato tubers, Telephusa mariona ^... 812 skins, and sprouts 632-634 A cer negundo, composition of green and albino Age of mycelium of Rhizopus triiici, effect on leaves 179 hydrolysis of starch 766-768 Acetic acid. See Acid, acetic. Agrotinae, similarity of certain species to Acid- Peciinophora gossypiella 833 acetic, in sugar beet top silage 540-542 Aguingay. See Rottboellia exáltala. boric, value as disinfectant 86-110 Ainslie, George G., and Cartwright, W. B. butyric, in sugar beet top silage 541-542 (paper): Biology of the Smartweed Borer, carbolic, coefficients of chlorin antiseptics. 100-102 Pyrausta ainslii Heinrich 837-844 citric- Air, carbon-dioxid content in barns 405-408 availability of iron to rice plants in cal- Alabama argillacea, collected on cotton 834 careous and noncalcareous soils 5ó~54 Alanin in potato protein. 624 in grapefruit 359_372 Albumins, effect on freezing-point depression glutaminic, in potato protein 624 oí seeds 593 hydrochloric, effect on availability of po- Alcohol, effect on— tassium 619-621 tetanus 69 hypochlorous, value as disinfectant 86-110 yield of volatile oil irom Chinese colza seed. 130-131 lactic, in sugar beet top silage 540-542 Aletia argillacia. Syn. Alabama argillacea. nitric, effect on availability of potassium. 619-621 Alfalfa. See Medicago saliva. phosphoric— Algae— effect on availability of potassium 616-617 influence on effect of copper sulphate on in plants grown with ferrous sulphate and organisms in water 200-203 gypsum 42 susceptibility to copper salts 197 in plants grown with sodium bicarbonate Alkaline reaction, effect on chlorosis of plants. 42-47 and sprayed with lime and iron salts.. 46 Alkalinity- in potato tubers, skins, and sprouts 628-634 influence on effect of copper on organisms propionic, in sugar beet top silage 540-542 in water 200-203, 205 tartaric— of poultry iced mixtures 141-149 availability to rice plants in calcareous of soil, relation of calcium content 855-868 and noncalcareous soils 50-54 A Ilium— effect on yield of volatile oil from Chinese ascalonicum, host of Colletotrichum circi- colza seed 130-131 nans 686-722 valeric, in sugar beet top silage 541-542 cepa, host of Colletotrichum circinans 685-722 Acid-base balance of poultry feed 141-149 porrum, host of Colletotrichum circinans.. 686-722 Acidity of— sativum, host of Colletotrichum circinans.. 686-722 poultry feed mixtures 141-149 Allyl— sap of normal and mottled orange leaves. 186-187 cyanid, formation during maceration of soil, relation of calcium content 855-868 Chinese colza seed 131 sugar beet top silage 540-542 isothiocyanate, physical constants 127 wheat, changes due to tempering 272-275 thiocyanate, formation during maceration Acids— of Chinese colza seed 131 diamino, in potato sprouts 624 thiourethane, formation during maceration effect on availability of potassium 619-620 of Chinese colza seed 131 Acids-solids ratio in grapefruit 359-373 Almond, tropical. See Tenninalia caiappa. Acronyctinae, one species collected on Mal- Althaea rosea, food plant of Crocidosema plc- vaviscus drummondii ;. 834 beiana 822 Adesmia spp., hosts oí Urophlydis alfalfae in Aluminum in normal and mottled citrus Argentina 296 leaves 167

889 890 Journal of Agricultural Research

A maranthus— Page Ash— Page hybridus, food plant of Pachyzancla bipunc- earbon-free— ialis 830 in plants grown with errons sulphate spp., food plants of Plaiynota rostrana 821 and gypsum 42 A nibrosia— in plants grown with sodium bicarbonate artemisiaefolia, shelter plant of Pyrausla and sprayed with lime and iron salts.. 46 ainsliei 839 in benn cotyledons 878 trißda, shelter plant of Pyrausta ainsliei 839 in Chinese colza seed 127 American larch. See Larix americana. in potato tubers, skins, and sprouts.... 628-634 Amid and monoamino nitrogen in potato in sugar beet top silage 538-540 tubers, skins, and sprouts 628-634 in sugars in storage 638-653 Ammonia— Asparagin in potato sprouts 6?3 effect in stimulating sprouting of potato Asparagus, host of Gibberella saubinetii 16 tubers 623 Aspergillus,, attacking wheat treated with influence on efficiency of chlorin disinfect- formaldehyde 215 ants , 102-109 Aspergillus— in potato protein 624 nicer, enzymic action.. .•. 778-779 in potato tubers, skins, and sprouts 632-634 ictrcus in canned ripe olives 377-379 Ammonium hydrate nitrogen in potato tubers, skins, and sprouts 628-634 Aster spp., shelter plants of Pyrausta ainsliei.. 839 Amorbia emigraiella, similarity to Plaiynota Atanasoff, Dimitr (paper): Pusarium-Blight rostrana 822 (Scab) of Wheat and Other Cereals 1-32 Amorpha nodule bacteria cultures, effect on Atethmia reciifascia. Syn. Bagisara tectifascia. milk 550 Atriplex spp., hosts of Eutettix tenella 247 Amphistoma, intestinal fluke in Tropics 194 "Atypical" carbon dioxid in bam air 408 Amylaseof Rhizopus tritici, with a Consider- Austrian pine. See Pinus austríaca. ation of Its Secretion and Action (paper). 761-786 Avena sativa, host of Gibberella saubinetii 1-32 Anaerobic bacilli in canned ripe olives 377-379 Avocado weevil. See Heilipus lauri. Anaçrus çiraulti, parasite of Eutettix tenella.. 250 Babaeaxa delliclla. Syn. Elhinia delliella. Ancylus caurinus, susceptibility to copper Bacillus— salts 199 ae.rogenes, relation of nodule bacteria to. . 543-556 Andropogon sorghum— alcaligenes, flagellation peritrichicor cephalo- host of Sclerospora philippinensis. trichic 552 var. halepense, immunity to Sclerospora anthracis— spontanea 671 effect of chlorin disinfectants 94-98 Angelica, host of Gibberella satcbinetii 16 inefficacy of echinacea against 74-75 Anias. See Andropogon sorghum var. hale- bolulinus— pense. in canned ripe olives 375-379 Annelids, susceptibility to copper salts 198 inefficacy of echinacea against 71-72 Anomis exacta, collected on Malvariscus drum- bovisepiicus,\nc:ft\ci\cy of echinacea against. 72-74 mondii 834 cercus in canned ripe olives 377-379 Another Conidial Sclerospora of Philippine cloacae in canned ripe olives 377-379 Maize (paper) 669-684 coli— Anthrax— flagellation peritrichic or cephalotrichic.. 552 inefficacy of cchinacea against 74-75 relation to Bacillus aerogencs 543 spores, effect of chlorin disinfectants 94-98 laclis viscosum, relation of nodule bacteria "Anthracnose" of onions. See Collectotri- to 543-556 chum circinans. megatherium, enzymic action 778 Antiseptics, comparison with green feed as inesentericus in canned ripe olives 3 77-379 preventive of intestinal disorders in chicks S69-873 mycoides in canned ripe olives 377-379 Apium graveolens, host of Sclerotinia minor 331-334 pneumoniae, relation of nodule bacteria to. 543-556 Aplastomorpha vandinei, parasite of Sitophi- pyocyaneus, effect of chlorin disinfectants lus oryza 421 upon 88-1 ro Appleman, Charles O., and Eaton, S. V. (pa- radicicola— per): Evaluation of Climatic Temperature comparison with cowpea-soybcan bac- Efficiency for the Ripening Processes in teria 545-554 vSweetcom 795-805 peritrichic flagellations 544 Araecerus fasciculatus— radiobacter— description 606-608 comparison with cowpea-soybeau bac- distinguishing characters 605-606 teria 545-554 synonymy 606 relation to Bacillus coli 543 Araucaria bidwellii, hypertrophied Icnticels. 255-266 relation of nodule bacteria to 543-556 Arbutus, trailing. See Epigaca repevs. solanacearum, not cause of Pusarium-wilt Arginin in potato protein 624 of tobacco 515-536 Artschwagcr, Ernst P. (paper): Pathological tuberculosis, effect of chlorin disinfectants.. 98-100 Anatomy of Potato Blackleg 325-330 typhosus, effect of chlorin disinfectants Ascospores of Giber ella saubinetii 11 upon 88-110 Oct. i, 1920-Mar. 15, 1921 Index 891

Bacteria— Page Bombyx obsoleta. Syn. Hcliothis obsoleta. ra^e in canned ripe olives 375-379 Borate, calcium, value as disinfectant 86-110 nodule, of leguminous plants 543-556 Bordeaux spraying, effect on composition of Bacteriological Study of Canned Ripe Olives, potato tubers, skins, and sprouts 632-634 A (paper) 375-379 Borer, smartweed. See Pyrausta ainsliei. Bacterium— Boric acid. See Acid, boric. ßuorescens liquefaciens in canned ripe Bork h ausen ia— olives 377-*79 ascriptella, agreement with type species... 816 japonicum, possible name for cowpea-soy- conia, similarity to Triclonella spp 815-816 bean nodule bacteria 551 diveni, similarity to Triclonella spp 815-816 Bactrocercfcucurbitae, host of Optus fletcheri. 423-438 episcia, similarity to Triclonella spp 815-816 Bagisara recti/ascia, collected on Mahaviscus fasciata, similarity to Triclonella spp 815-816 drummondii 834 haydenella, agreement with type species— 816 Barber, H. S., and Dietz, H. F. (paper): A mmulella, distinguishing characters 815-816 New Avocado Weevil from the Canal orties, similarity to Triclonella spp 815-816 Zone 111-116 pseudospretella, agreement with type Barley. See Hordeum spp. species 816 Bam air, carbon-dioxid content 405-408 Botryosphaeria saubinetii. Syn. Gibbcrella Bastardía viscosa, food plant of Platynota saubinetii. rostrana 8ax Botryiis— Batrachedra rileyi. Syii. Pyroderces rileyi. cinérea, growth of hyphae 703 Bean- spp., sclerotia 689 kidney. See Phaseolus vulgaris. Botulism— navy, nodule bacteria cultures, effect on caused by Bacillus botulinus 375-379 milk 550 inefheacy of echinacea against 71-72 seedlings, utilization of mineral constituents Botys(?) thalialis. Syn. Noctuelia ruf of as- in soil and in distilled water 875-880 cialis. Beans, horse. See Vicia faba. Bouyoucos, George (paper): Degree of Tem- Beet leaf hopper. See Eutettix tenella. perature to Which Soils Can Be Cooled Beet top silage 537-543 without Freezing 267-269 Beggar weed nodule bacteria cultures, effect Bouyoucos, George J., and McCool, M. M. on milk 550 (paper): Measurement of the Amount of Bcggartick. See Bidens hip innata. Water That Seeds Cause to Become Unfrce Benzoate, ferric, availability to rice plants in and Their Water-Soluble Material 587-593 calcareous and noncalcareous soils 50-54 Bras sica— Beta, host of Gibber ella saubinelii 16 besseriana, seed 125-126 Bicarbonate, sodium— campestris— effect on growth of rice 44-47 classification 118-122 value as disinfectant 86-110 chinensis— Bichlorid, mercuric, toxity to snails 196 classification 118-121 Bidens— oleífera, n. f. See Bras sica campestris bipinnata, shelter plant of Pyrausta ainsliei. 839 chinoleifera. frondosa, shelter plant of Pyrausta ainsliei.. 839 chinoleifera— Biology of the Smartweed Borer, Pyrausta analysis of seeds 126-132 ainsliei Heinrich (paper) 837-844 bactericidal aqtion 134-135 Bisulphid, carbon, formation during macera- botanical characteristics 122-126 tion of Chinese colza seed 131 classification 118-122 Black locust nodule bacteria cultures, effect pharmacological action 133-134 on milk 550 substitute for mustard 117-140 Blackleg of Solanum iuberosum 325-330 volatileoil 127-132 "Black spot" of onions. See Colletotrichum pekinensis, classification 118-121 circinans. var. annua sativa chinensis, classification 120 Blanfordia, intermediate host of Schistosoma van chinensis, classification 118-122 japonicum 198 var. sativa annua chinensis, classification 119-122 Blastobasidae, similarity of certain species to cernua— Pectinophora gossypiella 817-819 Japanese mustard 117 Blastobasis— leaf formation 124 citricolella. Syn. Zenodochium cítricolella. júncea— citriclla. Syn. Zenodochium citricolella. Chinese mustard 117 Blood, dried, availability of iron to rice plants leaf formation 124 napiformis, leaf formation 124 in calcareous and noncalcareous soils...... 50-54 nigra, leaf formation 124 Blood flukes, control by destruction of inter- olerácea buUata gemmifera, seed 125-126 mediate host. 193-208 orientalis, classification 118-122 Blood serum, effect on efficacy of chlorin pekinensis, classification 119 disinfectants 89-110 pe-tsai, classification 119 Blueberry, highbush. See Vaccmium co- rapa— rymbosum. classification 119 Bollworm, pink, similar lepidoptera 807-836 effect on water extract of soil 663-667 892 Journal of Agricultural Research

Brauncria— Page Carbohydrates— Pace angiistifolia— in sugar beet top silage 538-540 habitat 64 in Swcetcorn 795-8°5 medicinal properties 63-84 Carbolic-acid coeflicients of chlorin antisep- habitat 64 tics 100-102 pallida, habitat 64 Carbonate— Paradoxa, habitat 64 calcium- purpurea, habitat 64 cause of chlorosis in plants 36-49 Breazeale, J. F., and Briggs, Lyman J. (pa- effect on availability of iron in soil 47-49 per) : Concentration of rotassium in Ortho- effect on growth of plants 40-44 clase Solutions Not a Measure of Its Avail- in Kansas soils 864-866 ability to Wheat Seedlings 615-621 bisulphid, formation during maceration of Briggs, Lytnan J., and Breazeale, J. F. (pa- Chinese colza seed 131 per) : Concentration of Potassium in Ortho- dioxid— clasc Solutions Not a Measure of Its Avail- effect on availability of potassium 618 ability to Wheat Seedlings 615-621 Kansas soils 858 Bromid, ethyl, effect in stimulating sprout- relation to hypertrophy of conifers 261 ing of potato tubers 623 tetrachlorid, effect in stimulating sprouting Bromin, effect in stimulating sprouting of of potato tubers 623 potato tubers 623 Carbon-Dioxid Content of Barn Air (paper) 405-408 Bromus sp., host of Gibber ella saubinetii 16 Carmichacl, W. J., and Detlefsen, J. A. (pa- Broom. See Sarothaninus scoparms. per) Inheritance of Syudactylism, Black, Buckner, G. Davis (paper): Comparative and Dilution in Swine 595-604 Utilization of the Mineral Constitueiits in Carr, R. II., etal. (paper): Green Feed versus the Cotyledons of Bean Seedlings Grown in Antiseptics as a Preventive of Intestinal Soil and in Distilled Water 875-880 Disorders of Growing Chicks 869-873 Buckwheat. See Fagopyrum fagopyrum. Carrero, J. O., and Gile, P. I,, (paper): Cause Buds, freezing 655-66« of Lime-Induced Chlorosis and Availability Bugang grass. See Saccharum spontaneum. of Iron in the Soil 33-62 Bullinus, intermediate host of Schistosoma Cartwright, W. B., and Ainslie, George G. haemaiobium and S. mansoni 198 (paper): Biology of the Smartweed Borer, Pyrausta ainsliei Heinrich 837-844 Bunchberry. See Cornus canadensis. Carum— Burger, O. F. (paper): Variations in Colle- totrichum gloeosporioides 723-736 carvi, host öf Urophlyctis kriegeriana 313 incrassatuvi, host of Urophlyctis heviisphae- Butyric acid. See Acid, butyric rica 308 Buxus, host of Gibberella saubinetii 16 Calandra— Cassia— chamaecrista nodule bacteria cultures, effect frugilega. Syn. Sitophilus linearis. on milk 550 t amar indi. Syn. Sitophilus linearis, tora, food plant of Platynoia rostrana .... 811,821 (.Calandra) Sitophilus oryza. See Sitophilus Castanea vesca, calcifugous nature 34 oryza. Caulophilus latinasus— Calcifugous plants, ecology 33*34 description 608-610 Calciphilous plants, ecology 33-34 distinguishing characters 605-606 Calcium— synonymy 608 borate, value as disinfectant 86-110 Causation and correlation 557-585 carbonate— Cause of Lime-Induced Chlorosis and Avail- effect on growth of plants 40-44 ability of Iron in the Soil (paper) 33-6a in Kansas soils 864-866 Cataclysta (?) julianalis. Syn. Dicymolomia hypochlorite, value as disinfectant 86-110 julianalis. in bean cotyledons 878 Catolaccus incertus, parasite of Sitophilus oryza 423 in cropped and uncropped soils 663-667 Cattail. See Typha latifolia. in normal and mottled citrus leaves 166-190 Celery. See Apium graveolens. in soil extract 387-394 Cèphalanthus occidentalis— in southern poultry feeds 143 food plant of Phalonia cephalanthand 825 oxid in potato tubers, skins, and sprouts .. 633 water lenticels 256 phosphate, effect on growth of plants 40-44 Ceratitis capilata, experimental host of Optus silicate, effect on growth of plants 40-44 ftetcheri 423 relation to soil reaction 855-868 Cercocepkala elegans, parasite of Sitophilus sulphate effect on— oryza 421 availability of potassium 616-617 Chaetodacus cucurbitae, host of Opiusfletcltcri. 431 growth of plants 40-44 Chandler, Asa C. (paper): Control of Fluke Callida decora, parasite of Pyrausta ainsliei... 844 Diseases by Destruction of the Intermediate Calluna vulgaris, growth on calcareous soil... 35 Host 193-208 Calories, protein, in various poultry feeds.... 147 Changes Taking Place in the Tempering of Cannabis, host of Gibberella saubinetii 16 Wheat (paper) 271-275 Oct. i, 1920-Mar. 15, 1921 Index 893

Chaicliognathus pennsylvanicus, parasite of Page Citrus—Continued Page Pyransta ainsliei 844 milis, influence of— Chenopodiuvi— humidity on development of Pseudovw- glaucum, host of Urophlydis pulposa 313 nas citri 494-497 murale, host of Eutetlix tenella 247 temperature on development of Pseudo- spp., hosts of— monas citri 471-488 Eutettix tenella 247 temperature on growth 459-471 Urophlydis (Cladochytrium) pulposa 300 nobilis, var. deliciosa, composition of parts Chestnut. See Castanea vesca. of tree 162 Chicks, green feed versus antiseptics as pre- sinensis, parent of hybrid Rusk citrange... 459 ventive of intestinal disorders 869-873 Citrus-canker. Sec Pseudomonas citri. Chilling, influence in stimulating growth of Citrus leaves, normal and mottled, composi- plants 151-160 tion 161-191 Chinese colza. See Brassica campeslris chi- Cladochytrium alfalfac. Syn. Urophlydis noleifera. • (Physoderma) leproidca. " Chloramin T," valueas disinfectant 85-110 Clawson, A. B., and Marsh, C. Dwight (pa- " Chlorazene." See ' 'Chloramin T." per): Daubentonia longifolia (Coffee Bean), Chlorid— a Poisonous Plant 507-514 copper, toxity to snails 196-197 Clematis, host of Gibber ella saubinelii 16 ethyl, effect in stimulating sprouting of Clevenger, Joseph F\, et al. (paper): Studies potato tubers 623 in Mustard Seeds and Substitutes: I. Chi- ferric— nese Colza (Brassica campestris chinoleifera availability to rice plants in calcareous Viehoever) 117-140 and noncalcareous soils 50-54 Climate— effect on growth of rice 42-44 effect on composition of potato tubers, skins, in normal and mottled citrus leaves 166-190 and sprouts 632-634 manganese, effect on formation of potato relation to crownwart of alfalfa 319 tubers 623 Climatic temperature, effect on ripening proc- potassium— esses in sweetcom 795-805 absorption by plants 616-617 Clonorchis— effect on concentration of soil solution.... 393 human liver fluke 193-195 parasite of Melania 198 Chloridca— Clover- obsoleta. Syn. Heliothis obsoleta, Japan, nodule bacteria cultures, effect on virescens. Syn. Heliothisvirescens. milk 550 Chlorin— red, nodule bacteria cultures, effect on milk. 550 disinfectants, germicidal value 85-110 sweet, nodule bacteria cultures, effect on in southern poultry feeds 143 milk 550 Chlorinated lime, influence on effect of copper See Trifolium spp. sulphate in water 202 Clydonopleron tecomae, similarity to Pedino- Chlorosis, caused by lime 33-62 phora gossypiella 832 Chrysauginae, similarity of one species to Cocci in canned ripe olives 377-379 Pedinophora gossypiella 832 Cocklebur. See Xanlhium communis. Chrysophyllum oliviformae, host fruit of Cefa- Coffea arábica, host of Ceratitis capitata 423 litis capitata 423 Coffee bean. See Daubenlonia longifolia. Citrate, ferric— Coffee. See Coffea arabica. availability to rice plants in calcareous and Cogon. See Imperata cylindracea. noncalcareous soils 50-54 Con— effect on growth ot rice 42-44 lachryma, host of Sitophilus oryza 410 Citric acid. See Add, citric lachryma-jobi, immunity to Sclerospora Citrus— spontanea 671 aurantiuvi, composition of parts of tree 162 Cold, influence in stimulating growth of aurantifolia, parent of limequat 469 plants 151-160 decumana, changes during storage 357-373 Colletotrichum— grandis— antirrhini, stromata 692 composition of leaves 163 circinans, causal organism of onion smudge. influence of— 685-722 humidity on development of Pseudo- fruclus, similarity to C. circinans 693-694 monas citri 494-497 gloeosporioides, variations 723-736 temperature on development of Pseu- lagenarium, growth of hyphae 703 domonas citri 471-488 lindemulhianum, growth of hyphae 703 temperature on growth 459-471 sp — limonia, composition of parts of tree 162 cause of wilting of cereal plants 7 medica, host of Gloeosporium limeiticolum... 724 isolated from diseased potato vines.... 280-281 894 Journal of Agricultural Research

Colloidal material, effect on freezing of water Page Cowpea-soybcan bacteria, comparison with Page in soil 591 Bacillus radicicola and B. radiobacter 545-554 Colloids, effect on oxidation of potassium.... 620 Crab, wild. See AI alus coronaria. Colon bacilli in canned ripe olives 377-379 Crambiuae, similarity of one species to Pecti- Color, inheritance in swine 595-604 nophora gossypiella 830-831 Comparative Study of the Composition of the Cremasius facilis, parasite of Pyrausta sp 843 Sunflower and Com Plants at Different "Critical temperature" for fruit buds 655-662 Stages of Growth, A (paper) 787-793 Crocidosema plebiana— Comparative Utilization of the Mineral Con- difference from Platynota rostrana 821 stituents in the Cotyledons of Bean Seed- similarity to Pectinophora gossipiella 807,822 lings Grown in Soil and in Distilled Water Crops, effect on water extract of soil 663-667 (paper) 875-880 Crotonyl isothiocyanate— Composition of Normal and Mottled Citrus in Chinese colza seed 127-132 Leaves (paper) 161-191 physical constants 127 Composition of Tubers, Skins, and Sprouts of Crop growth, effect on physical state of soil. 397-404 Three Varietiesof Potatoes (paper) 623-635 Crownwart of Alfalfa Caused by Urophlyctis Concentration of Potassium in Orthoclase alfalfae (paper) 295-324 Solutions Not a Measure of Its Availability Crude fiber— to Wheat Seedlings (paper) 615-621 in Chinese colza seed 127 Conidia of Gibberella saubinetii 9-11 in sugar beet top silage 538-540 Conifers, hypertrophied lenticels 253-266 Crustaceans, susceptibility to copper salts. .. 198 Conium, host of Gibberella saubinetii 16 Cucúrbita sp., host of Gibberella saubinetii 16 Control of Fluke Diseases by Destruction of Cummins, A. B., and Kelley, W. P. (paper): the Intennediate Host (paper) 193-208 Composition of Normal and Mottled Citrus Convolvulus, host of Gibberella saubinetii 16 Leaves 161-191 Cook, F. C. (paper): Composition of Tubers, Cyanid, allyl, formation during maceration of Skins, and Sprouts of Three Varieties of Chinese colza seed 131 potatoes 623-635 Cystin in potato protein 624 Copper— Daubentonia longifolia (Coffee Bean), a chlorid, toxicity to snails 196-197 Poisonous Plant (paper) 507-514 in potato tubers, skins, and sprouts 629-634 Daubentonia longifolia— nitrate, toxicity to snails 196 lethal dose 512 sprays, effect on potato sprouts, skins, and pathological effects 511 tubers 625-634 symptoms of poisoning 510 sulphate, toxicity to snails 196-208 Decodon verticillatus, water lenticels 256 Corn borer, European. See Pyrausta nubila- Degree of Temperature to Which Soils Can Be lis. Cooled without Freezing (paper) 267-269 Com— Depressaria gossypiella. Syn. Pectinophora comparison with sunflowers for silage.... 787-793 gossypiella. Sec Zea mays. Desiccation, effect on Colletotrichuvi circi- Cornus canadcnsis, influence of cold in stimu- nans 698-699 lating growth (Pi. 29) 151-160 Deterioration of sugars in storage 637-653 Coronilla, host of Gibberella satibinetii 16 Detlefseu, J. A., and Cannichael, W. J. Correlation and Causation (paper) 557-585 (paper): Inheritance of Syndactylism, Correlations for crop yields in different years 337-356 Black, and Dilution in Swine 595-604 Cosmopterygidae, similarity of one species to Dextrose in grapefruit 359-372 Pectinophora gossypiella 820 Diachas7na— Cossonus pinguis. Syn. Caulophilus latina- fullawayi, parasite of Ceraiitis capitula 424 sus. iryoni, parasite of Ceraiitis capitata 424 Cotton, Richard T. (paper)— Dialyzed iron, effect on growth of rice 42-44 Four Rhynchophora Attacking Com in Diamino— Storage 605-614 acids in potato sprouts 624 Rice Weevil, (Calandra) Sitophilusoryza. 409-422 nitrogen in potato tubers, skins, and Tamarind Pod-Borer, Sitophilus linearis sprouts 62R-634 (Herbst) 439-446 Dicymoloviia julianalis, similarity to Pectino- Cotton. See Hibiscus lasiocarpus. phora gossypiella 807,830-831 Cotyledons, utilization of mineral constitu- Dietz, H. F., and Barber, H. S. (paper): A ents in soil and in distilled water 875-880 New Avocado Weevil from the Canal Couch, James F., and Giltner, Leigh T. Zone 111-116 (paper) : An Experimental Study of Echi- Digitalis purpurea, growth on calcareous soil. 35 nacea Therapy 63-84 Dioxid, carbon- Coville, Frederick V. (paper): The Influence effect on availability of potassium 618 of Cold in Stimulating the Growth of in bam air 405-408 Plants 151-160 Diplococci in canned ripe olives 377-379 Cowpea nodule bacteria cultures, effect on Disinfectants, chlorin 85-110 milk 550 Dock, curled. See Rumex crispus. Oct. i, 1920-Mar. 15, 1921 Index 895

Page Ethyl— Page Dourine, inefficacy of echinacea against 80-82 bromid, effect in stimulating sprouting of Downy mildew of maize. SecSclcrospora spp. potato tubers 623 Drechsler, Charles, and Jones, Fred Reuel chlorid, effect in stimulating sprouting of (paper): Crownwart of Alfalfa Caused by potato tubers 623 Urophlyctis alfalfae 295-324 ether, effect on formation of potato tubers . 623 Drying, effect on formaldehyde injury to seed Euchlaenahixurians, susceptibility to Sclcro- wheat 231-242 spora spontanea 671 Dryinidae, parasite of Eutettix tcnella 251 Eucosvia— Katon, S. V., and Appleman, Charles O. discretivana, n. sp 823-824 (paper): Evaluation of Climatic Tempera- helianthana, similarity to Pectinophora gas- ture Efficiency for the Ripening Processes sypiella 824 in Sweetcora 79S-8oS obfuscana, similarity of E. discretivana... 823-824 "Ebony, Mexican." See Siderocarpus flexi- plebeiana. Syn. Crocidosema plebeiana. caulis. Eupatorium sp., shelter plants of Pyrausta Echinacea— ainsliei 839 augusto folia, medicinal properties 63-84 "Eusol," value as disinfectant 86-110 Purpurea. Syn. Brauneria purpurea. Eutettix tenelín— Echinacea therapy 63-84 description 245-246 Edlefsen, N. E-, and West, Frank ly. (paper): life history 247-248 Freezing of Fruit Buds 655-662 natural enemies 250-251 Edson, H. A. (paper): Vascular Discoloration seasonal history 248-249 of Irish Potato Tubers 277-294 Evaluation of Climatic Temperature Effi- Effect of Season and Crop Growth on the ciency for the Ripening processes in Sweet- Physical State of the Soil (paper) 397-404 corn (paper) 795-805 Effect of Various Crops upon the Water Ex- Evaporation, effect on formaldehyde injury tract of a Typical Silty Clay I oam Soil v to seed wheat 221-222 (paper) 663-667 Ewing, Clare Olin, et al. (paper) : Studies in Effects of X-Ray s on Trichinae (paper). ..845-854 Mustard Seeds and Substitutes: I. Chinese Electrolytic hypochlorite solutions, effect of Colza (Brassica campestris chinoleiicra ammonia loa Viehoever) 117-140 Electrometric titration, indication of relation of calcium content of soil to reaction 855-868 Exentcrus diprioni, parasite of Neodiprion Emmer, host of Gibberella saubinetii 16 kcontei 757-758 Einpoascasp.,hostoiAbbellasubflava 250 Exorista vulgaris, parasite of Pyrausta sp 843 Enarmon ia tristrigana. Syn. Laspeyresia tris- Experimental Study of Echinacea Therapy, ir ig ana. An (paper) 63-84 Ennychia rufofascialis. Syn. Noctuelia rufo~ Exponential indices of ripening in sweetcorn . 802- fascialis. 804 Enzym in Chinese colza seed destroyed by Extract, soil, relation to soil solution 381-395 tartaric acid 130 Fagopymm/agopyruvi, food plant of Pyrausta Enzymic action— ainsliei 838 in P seudomonas citri cultures 450~4SS Fasciola hepática, liver fluke of cattle and of Rhizopus tritici on starch 761-786 sheep 194,198 Ephestia ostrinella. Syn. Moodna ostrinella. Feed, poultry, potential acidity aüd alka- Epigaea repens, influence of cold in stimulat- linity 141-149 ing growth (Pi. 30) 151-160 Ferric— Erodium— benzoate, availability to rice plants in cicutarium, host of Eutettixtenella 247 calcareous and uoncalcareous soils 50-54 moschatum, host of Eutettix tenella 247 chlorid— Erebinae, species collected on Hibiscus lasio- availability to rice plants in calcareous carpus, Malvaviscus drximmondii, and Abu- andnoncalcareous soils 50-54 tilón incanum 834 effect on growth of rice 42-44 Ether— citrate— ethyl, effect on formation of potato tubers.. 623 availability to rice plants in calcareous extract— and uoncalcareous soils 50-54 in Chinese colza seed 127 effect on growth of rice 42-44 in sugar beet top silage 538-540 oxalate, availability to rice plants in cal- in sunflower and corn silage 881-888 careous and noncalcareous soils 50-54 Ethmia— tannate, availability to rice plants in cal- bittenella, similarity to Pectinophora gos- careous and noncalcareous soils 50-54 sypiella 819 tartrate— delliella, reared from Wissadula lozani 819 availability to rice plants in calcareous Ethmiidae, similarity of certain species to and noncalcareous soils 50-54 Pectinophora çossypiella 819 effect on growth of rice 43-44 896 Journal of Agricultural Research Vol. xx

Ferric—Continued PaRC Fusarium—Continued I'age valerianate, availability to rice plants in oxysporum— calcareous and noncalcareous soils 50-54 failure to alter starch of Irish potato 765 " Ferric húmate," availability to rice plants isolated from discolored potato tubers. 280-282 in calcareous and noncalcareous soils 50-54 var. nicotianac, n. van, causal organism "Ferric molasses," availability to rice plants of Fusarium-wilt of tobacco 521-536 in calcareous and noncalcareous soils... 50-54 radicicola, failure to alter starch of Irish Ferrous sulphate— potato 765 availability to rice plants in calcareous redolens, parasite on cereals 2, 21 and noncalcareous soils 50-54 roseum. Syn. Gibberella saubinetii. efïcct on action of gypsum 33-44 rostratum. Syn. Gibberella saubinetii. Fertilizer, effect on composition of potato rubiginosum, causal organism of "snow- tubers, skins, and sprouts 632-634 mold" 19 Fiber, crude, in Chinese colza seed 127 scirpi, parasite on cereals 2, 21 Filaree. See Er odium cicutarium. solani, parasite on cereals 2, 21 Fluke diseases, control by destruction of inter- sublatuvi, causal organism of "snowmold". 20 mediate host 193-208 spp., cause of vascular necrosis of potato F lumínico la fusca, susceptibility to copper tubers 277 salts 199 tabacivorum, causal organism of disease of Fluminicola, member of family Amnicolidas. 198 tobacco 517-518 Fluorid, potassium, effect on yield of volatile iropicalis. Syn. Gibberella saubinetii. oil from Chinese colza seed 130-131 Fusarium-Blight (Scab) of Wheat and Other Footrot of cereals caused by Gibberella saubi- Cereals (paper) 1-32 netii 6-7 Fusarium-Wilt of Tobacco (paper) 515-536 Formaldehyde— Garlic. See A Ilium sativum. injury to seed wheat 209-244 Gasoline, effect in stimulating sprouting of physical properties 218-223 potato tubers 623 Forlunella japónica, parent of limequat 469 Gastrodiscus, intestinal fluke in Tropics 194 Four Rhychophora Attacking Com in Storage Gclechia— (paper) 605-614 bosquella, similarity to Borkhausenia diveni Foxglove, See Digitalis purpurea. and Noctuelia rufofascialis 811 Fraxinus, host of Gibberella saubinetii 16 hibiscella— Freezing, effect on Colletotrichum circinans. 699-700 similarity of G. ncoirophclla 812 Freezing of Fruit Buds (paper) 655-662 similarity to Pcctinophora gossypiella... 810-811 Freezing-point depression— malvella. Syn. Pectinophora malvella. of dry seeds 592-593 neotrophella, n. sp 811-812 of sap of normal and mottled orange leaves. 186-187 similiella. Syn. Isophrictis similiella. soil, efïect of moisture 390-391 trophclla, similarity of G. neotrophella 812 Freezing point of soils 267-269 Gelechiidae, similarity of certain species to Fruit buds, freezing 655-662 Pectinophora gossypiella 808-814 Further Stud ies in the Deterioration of Sugars Germicidal value of chlorin disinfectants.... 85-110 in Storage (paper) 637-653 Germination of wheat, effect of formalde- Fusarium— hyde 211-744 araiosporuvi, parasite on cereals 2, 21 Glyphodes pyloalis, leaf-tying pyralid 830 arthrosporioides, parasite on cereals 2, 21 Gibbera pulicaris f. zeae maydis. Syn. Gibber- avenaceum— ella saubinetii. causal organism of " snowmold" 20 Gibberella— parasite on cereals 2, 21 saubinetii— culmorum— description 4-9,15-19 causal organism of "snowmold" 19 dissemination of spores 11-13 parasite on cereals 2,21 economic importance 3 similarity of conidia to those of Gibberella hosts 1-9,16 saubinetii 16 life history 9-11 var. leleins, parasite on cereals 2, 21 parasite on cereals 1-32 didymium, casual organism of "snowmold". 20 tritici. Syn. G. saubinetii. discolor var. sulphureum, isolated from dis- Gilc, P. ly., and Carrero, J. O. (paper): Cause colored potato tubers 282 of Lime-Induced Chlorosis and Availa- graminearum. Syn. Gibberella saubinetii. bility of Iron in the Soil 33-62 herbarum— Giltner, I,eigli T., and Couch, James F. causal organism of " snowmold " 20 (paper): An Experimental Study of Echi- parasite on cereals 2, 21 nacea Therapy 63-84 lolii, causal organism of " snowmold" 20 Gingko bilboa, hypertrophied lenticels 255 metachrou7n, causal organism of "snow- Girdling, influence in stimulating growth of mold"..; 20 plants 155 nivale, cause of "snowmold" 19 Gleditschia, host of Gibberella saubinetii 16 Oct. i, 1920-Mar. 15, 1921 Index 897

Page Page Globulin in potato protein 624 Helix pomatia, copper content of body 200 Glocos potitem— Hendry.Mary F., and Johnson, Alice (paper): fructigenum, growth of hyphae 703 Carbon-Dioxid Content of Bam Air 405-408 Umeiticolum, parasite of Citrus vieclica 724 Heterogeneity in experimental plots 335-356 Glomerella cingulata, relation to Collctolri- Hibiscus— chum glocosporioides 725 esculentus, food plant of— Glucose, elTect on hydrolysis of starch by Crocidoscma plebeiana 822 Rhizojnis tritici 768-769 Platynota rostrana 821 Glutaminic acid. See Acid, glutaminic. lasiocarpus, food plant of— Glyccria aquatica, host of Gibbcrella saubindn. 16 Gelechia hibiscclla 810-811 Goldenrod. See Solidago spp. Pectinophora gossypiclla S07-836 GotiatopKS contortulus, host of Entdtix tcnclla 251 militaris, food plant of— Goniobasis, akin to Melania 198 Crocidose?na plebeiana 822 Goniobasis plicifera, susceptibility to copper Gelechia hibiscclla 810-811 salts 199 rosa-sinensis, food plant of Crocidoscwa ple- Gram-ncgalive bacilli in canned ripeo lives 377*379 beiana 822 Gram-positive badila in canned ripe olives 377-379 Hickman, C. W., et al. (paper): Sunflower Grapefruit. See Citrus decumana and C. Digestion Kxpcrimcnt with Cattle and grandis. Sheep 881-888 Grass, buganß. Sec Sa echar um s pontaneum. Highbush blueberry. Sec Vacciniuni corym- Grasses, hosts of Gibbcrella saubinctii 1-32 bosum. Green lfeed versus Antiseptics as a Preven- Histidin in potato protein 624 tive of Intestinal Disorders of Growing Hoagland, D. R., and Martin, J. C. (paper): Chicks (paper) 869-873 Fflect of Season and Crop Growth on the Grouseberry. See Viburnum amcricanum. Physical State of the Soil 397-404 Growth, effect on composition of potato tu- Iloaglaml, I). R., Martin, J. C, and Stewnit, bers, skins, and sprouts 632-634 G. R. (paper): Relation of the Soil Solution Growth of plants, influence of cold 151-160 to the Soil Extract 3^i-395 Gyneria, host of Gibbcrella saubinetii 16 Holcoeera— Gypsum, effect on— confamulella, n. sp 818-819 availability of potassium 616-617 viodcslella, similarity of //. confamulella 819 growth of rice 40-42 ochrocephala, similarity to Peclinof>hora Hahn, Glenn G., Hartley, Carl, and Rlioads, gossypiella 818 Arthur S. (paper): Hypertrophied Lenti- Holly. See Ilex aquifolium. cels on the Roots of Conifers and Their Re- Hollyhock. See Althaea rosea. lation to Moisture and Aeration 253-266 Homocosoma clectcllum, similarity to Pecti- Hansen, Roy, and lyohnis, F. (paper): Nod- nophora gossypiclla 831-832 ule Bacteria of Leguminous Plants 543-556 Hordcum spp.— Harris, J. Arthur, and Scofield, C. S. (paper): effect on water extract of soil 6Ó3-667 Permanence of Differences in the Plots of susceptibility to formaldehyde injury... 240-241 an Experimental Field 335-356 "Húmate, ferric," availability to rice plants Harter, L. ly. (paper) : Amylase of Rhizopus in calcareous and noncalcareous soils 50-54 tritici with a Consideration of Its Secretion Humidity— and Action 761-786 effect on— Hartley, Carl, et al. (paper): Hypertrophied formaldehyde injury to seed wheat.. .. 223-231 Lenticels on the Roots of Conifers and Their growth of Pseudomonas cilri 447-506 Relation to Moisture and Aeration 253-266 relation to— Hawkins, Lon A.,andMagness, J. R. (paper): deterioration of sugars in storage 642-653 Some Changes in Florida Grapefruit in freezing of fruit buds 655-662 Storage 357-373 Hurd, Annie May (paper): Injury to Seed Heather. See Calluna vulgaris. Wheat Resulting from Drying after Disin- Hederá helix, composition of green and albino fection with Formaldehyde 209-244 leaves 179 Hydrate nitrogen, ammonium, in potato Heiiipus— tubers, skins, and sprouts 628-634 lauri, avocado weevil 111-116 Hydrochloric acid. See Acid, hydrochloric. persae, new avocado weevil 111-116 Hydrogen-ion concentration— piltieri, avocado weevil 111-116 changes in tempering of wheat 272-275 of sap of normal and mottled orange Heinrich, Carl (paper): Some Lepidoptera leaves 186-187 IJkely to Be Confused with the Pink Hydrolysis of— Boll worm 807-836 starch by Rhizopus tritici 765-783 Heliothis— sugar in ripening of sweetcom 795-805 armiger. Syn. H. obsoleta. Hydroxid, potassium, effect on yield of vol- {Çhlor idea)— atile oil from Chinese colza seed 130-131 obsoleta, similarity to Pectmophora gos- Hypertrophied Eenticels on the Roots of sypiella 833 Conifers and Their Relation to Moisture virescens, similarity to //. obsoleta 833 and Aeration (paper) 253-266 898 Journal of Agricultural Research

Hypochlorite— Page Jagger, Ivan C. (paper)— Page calcium, value as disinfectant 86-110 Sclcrotinia minor, n. sp., the Cause of a sodium, value as disinfectant 86-110 Decay of L,ettuce, Celery, and Other solutions, electrolytic, effect of ammonia... 102 Crops 331-334

Hypochlorous acid. See Acid, hypochlorous. Transmissible Mosaic Disease of Iyettucc, Hypostena variabilis, parasite of Pyrausia sp.. 843 A 737-740 Ilex aquifolium, composition of green and Japan clover nodule bacteria cultures, effect albino leaves 179 on milk 550 Imperata cylindracea, immunity toSclcrospora Jasmine, yellow bush. See Jasmininn nudi- spontanea 671 ßortim. Influence of Cold in Stimulating the Growth Jasminum nudiflorum, influence of cold in of Plants, The (paper) 151-160 stimulating growth 158 Influence of Temperature and Humidity on Job's tears. See Coix lachryma. the Growth of Pseudomonas citri and Its Johnson, Alice, and IIendry,Mary F. (paper): Host Plants and on Infection and Develop- Carbon-Dioxid Content of Barn Air 405-408 ment of the Disease (paper) 447-506 Johnson, James (paper): Fusarium-Wilt of Inheritance of Syndactylism, Black, and Tobacco 515-536 Dilution in Swine (paper) 595-604 Jones, Fred Reuel, and Drechsler, Charles Injury to Seed Wheat Resulting from Drying (paper): Crownwart of Alfalfa Caused by after Disinfection with l-ormaldehyde Urophlyctis alfalfae 205-324 (paper) 209-244 Juglans, host of Gibber ell a saubinetii 16 Inorganic iron compounds, availability to rice Jwiiperus virçiniana, immunity from hypcr- plants in calcareous and noucalcareous soils 50-54 trophied lenticels 255 Intestinal disorders of chicks, green feed Kaupp, B. F., and Ivey, J. K. diaper): Study versus antiseptics as preventive 869-873 of Some Poultry Feed Mixtures with Refer- ínula hclenium, ingredient of "Subculoyd ence to Their Potential Acidity and Their ínula and Kchinacea " 65 Potential Alkalinity: 1 141-140 Investigations of the Germicidal Value of Kelley, W. P., and Cummins, A. B. (paper): Some of the Chlorin Disinfectants (paper). 85-110 Composition of Normal and Mottled Citrus lodin number on ether extract of Chinese colza Leaves ifii-191 seed 127 Kennard, D. C, et al. diaper): Green Feed iPonwca batatas, host of Gibber ella saubinelii.. 16 versus Antiseptics as a Preventive of In- Iron— testinal Disorders of Growing Chicks 869-873 availability to rice plants 47-58 Kopeloff, Nicholas, Perkins, IT. Z. K., and compounds, availability to rice plants in Welcome, C. J. (paper): Further Studies in calcareous and noncalcareous soils 50-54 the Deterioration of Sugars in Storage... 637-653 dialyzed, effect on growth of rice 42-44 Koser, Stewart A. (paper): A Bacteriological effect of— Study of Canned Ripe Olives 375-379 carbonate of lime on availability in soil.. 47-49 Kostelcyzkya spp., food plants of— soil water on availability 54-58 Crocidosema ple.biana 822 effect on— Gelechia hibiscelia 810-811 chlorotic plants 38-39 Meskea thyridinae 828-829 growth of rice 41-47 Kundmannia sicula, host Urophlyctis alfalfae. 308 in normal and mottled citrus leaves 166-190 Lactic acid. See Acid, lactic. in plants grown with ferrous sulphate and Lagorotis— gypsum 42 diprioni, parasite of Ncodiprion lecovtci.. 757-758 in plants grown with sodium bicarbonate virçiniana, parasite of Ncodiprion lecon- and sprayed with lime and iron salts. ... 46 tei 757-75S in soil 33-62 Laniana hórrida, food plant of Borkhauscnia in southern poultry feeds 143 diveni 815 Irish potato. See Solanum tuberosum. Larch, American. See Larix americana. Isophrictis similiella, similiarity to Pectino- Larix— phora gossypiella 813-814 americana, host of Ncodiprion lecontei 757 Isothiocyanate— laricina— allyl, physical constants 127 hypertrophied lenticels 255-266 crotonyl— influence of cold in stimulating growth in Chinese colza seed 127-132 (Pi. 21) 151-160 physical constants 127 Larunda palmii. Syn. Zcnodoxus palmii. para-oxybenzyl, difference from crotonyl Larvae of aquatic insects, susceptibility to isothiocyanate 135 copper salts 198 Ivey, J. K., and Kaupp, B. !R (paper): Study Laspeyresia tristrigana, similarity to P cetina- of Some Poultry Feed Mixtures with phora gossypiella 824-825 Reference to Their Potential Acidity and Latshaw, W. L., et al. (paper): Relation of Their Potential Alkalinity: 1 141-149 the Calcium Content of Some Kansas Soils Ivy. See Hederá helix. to the Soil Reaction as Determined by the Jack pine. See Pinns banksiana. Electromctric Titration 855-868 Oct. i, 1920-Mar. is, 1921 Index 899

Latuca sativa— Pace Magnesium— Page host of Sclerotinia minor 331-334 in bean seedlings 878 transmissible mosaic disease 73 7-740 in cropped and uncropped soils 663-667 Leafhopper, beet. See Eutcttix tenella. in normal and mottled citrus leaves 166-190 lycConte's Sawfly, an Enemy of Young Pines in soil extract 387-394 (paper) 741-760 in southern poultry feeds 143 Leek. See A Ilium porrum. oxid in potato tubers, skins, and sprouts... 633

Iveguminous plants, nodule bacteria 543~SS6 Magness, J. R., and Hawkins, Lon A. (paper): lycmon leaves, composition 167-174 Some Changes in Florida Grapefruit in I,enticels, hypertrophiée!, on the roots oí coni- Storage 357-373 fers 253-266 Maize. See Zea mays. lycpidoptera resembling pink bollworm 807-836 Malus coronaria, influence of cold in stimu- I,ettuce. See Latuca sativa. lating growth (PI. 22) 151-160 I,eucin in potato sprouts 624 Malvastrum— Life history and habits of the beet leafhop- spicatum, food plant of Crocidosema plc- per 245-252 beiana 822 Ligustrum aurea, composition of green and sp., food plant of Tdphusa mariona 812 albino leaves 182 Malvaviscus drummondü, food plant of— Lime- Bagisara rcclifascia 834 carbonate, effect on availability of iron in Crocidosema plebeiana 822 soil 47-49 Helioihis obsoleta S33 cause of chlorosis in plants 33-62 Meskca thyridinae 828-829 chlorinated, influence on effect of copper Platynola rosirana 831 sulphate in water 202 Manganese— effect on— chlorid, effect on formation of potato tubers. 623 availability of potassium 617 in normal and mottled citrus leaves 167 gro-wth of rice 44-47 Manhatta ostrinella. Syn. Moodna ostrinclla. in plants grown with ferrous sulphate and Maple. See Acer negundo. gypsum 42 Maritime pine. See Pinus pinaster. in plants grown with sodium bicarbonate Marsh, C. Dwight, and Clawson, A. B. (pa- and sprayed with lime and iron salts 46 per) : Daubentonia longifolia (Coffee Bean), JLimnaca— a Poisonous Plant 507-514 tnilimoidcs, susceptibility to copper salts.. 199-200 Martin, J. C, and Stewart, G. R. (paper): (Galba) bulimoides, susceptibility to various Effect of Various Crops upon the Water salt solutions 196-208 Extract of a Typical Silty Clay Loam próxima roivelli, susceptibility to copper Soil 663-667 salts 199 Martin, J. C, and Hoagland, D. R. (paper): spp., intermediate hosts of flukes 195-208 Effect of Season and Crop Growth on the Liver flukes, control by destruction of inter- Physical State of the Soil 397-404 mediate host 193-208 Martin, J. C, et al. (paper): Relation of the Loblolly pine. See Pinus taeda. Soil Solution to the Soil Extract 381-395 Locust, black, nodule bacteria cultures, effect Measurement of the Amount of Water That on milk 550 Seeds Cause to Become Unfree and Their Löhnis, F., and Hansen, Roy (paper): Nod- Water-Soluble Material (paper) 587-593 ule Bacteria of Leguminous Plants 543-556 Medica go— Longleaf pine. See Pinus palustris. denliculata, host of Urophlyctis alfalfae in Lung flukes, control by destruction of inter- Argentina 296 mediate host 193-208 falcata, host of Urophlyctis alfalfae 296 Lupine nodule bacteria cultures, effect on sativa, host of— milk 550 Gibberella satibinelii 16 Lupinus— Urophlyctis alfalfae 295-324 angustifolius, calcifugous 34 Melania, intermediate host of Paragonimus, hitcus, calcifugous nature 34 Metagonimus, and Clonorchis 198 Lycaenidae, pests of Malvaceae 834 Melanotaenium alismatis. Syn. Physodenna Lysin in potato protein 624 maculare. McCool, M. M., and Bouyoucos, George J. Melilolus alba, growth of Gihhcrel/a saubinrtii (paper): Measurement of the Amount of cultures on 18 Water That Seeds Cause to Become Unfree Melon fly. See Bactrocera cucurbilae. and Their Water-Soluble Material 5S7-593 Mentha aqualica, host of Physodenna menthae. 313 Macrosporium— Meraporus— parasilicum, parasite of Allium spp 687-68S calandrae, parasite of Silophilus oryza 422

porrit parasite of Allium spp 687-688 requisitns, parasite of Silophilus oryza 422 Magnesia in plants grown with— utibilis, parasite of Silophilus oryza 423 ferrous sulphate and gypsum 42 Mercuric bichlorid, toxity to snails 196 sodium bicarbonate and sprayed with lime Meskea dyspleraria, similarity to Pcctinophma and iron salts 46 gossypiella 828-829 coo 'Journal of Agricultural Research

Page Page Metagonimus, parasite of Melania 198 Nelumbo lutea, not food plant of Pyrausta "Mexican ebony." See Siderocarpus fUxi- ainsliei 838 caulis. Neocatolaccus australimsis, parasite of Sito- Microbracon sp., parasite of Pyrausta sp 843 philus oryza 422 Microorganisms, relation to deterioration of Neodiprion lecontei— sugars in storage 637-653 control 759-760 Middleton, William (paper) : LeConte's Saw- description 741-750 fly, an Enemy of Young Pines 741-760 distribution 758 Mildew, downy, of maize. See Sderospora economic importance 758-759 spp. effect of weather 753_754 Mimosa berlandieri, food plant of Gelechia neo- hosts 756 trophella 811-813 life history 750-753 Mimusops elengi, host fruit of Ceratitis capi- mating 754-755 tata 425 oviposition 755-756 Mineral content of— parasites 757-758 bean cotyledons, utilization in soil and in Neopales maera, parasite of Ncodiprimi lecon- distilled water 875-880 tei 757-758 southern poultry feeds 143 New Avocado Weevil from the Canal Zone, Miscanthusjaponicus, susceptibility fo Sclero- A (paper) 111-116 spora sponianea 671 Nicotiana— Moisture— glauca, host of Füsarium oxysporuvi var. effect on freezing-point depression of soil. 390-391 nicotianae 524-525 in Chinese colza seed 127 rustica, host of Fusarium oxysporum var. influence,011 formaldehyde injury to seed nicotianae 525 wheat 238-240 tabacum, host of Fusarium oxysporuvi var. in sugars in storage. * 638-653 nicotianae, n. var 515-536 in sunflower silage 883 Nitrate— in sweetcom 799 copper, toxicity to snails 196 relation to hypertrophied lenticels on the effect on availability of potassium 616-617 roots of conifers 253-266 in soil extract 387-394 soil, effect on Fusarium-wilt of tobacco.... 529 Nitrates in cropped and uncropped soils 663-667 Molasses, availability to rice plants in calcare- Nitric acid. See Acid, nitric. ous and noncalcareous soils 50-54 Nitrogen— "Molasses, ferric," availability to rice plants effect on availability of potassium 616-617 in calcareous and noncalcareous soils 50-54 in allyl and crotonyl isothiocyanate 127 Mold. See Aspergillus ter r eus. in feces of chicks 872-873 Molds- in normal and mottled citrus leaves 166-190 attacking wheat treated with formaldehyde 215 in plants grown with sodium bicarbonate in sugars in storage 638-653 and sprayed with lime and iron salts.... 46 Momordica charantia, host of Chaetodacus cu- in potato tubers, skins, and sprouts.. 623,628-634 curbiiae 431 in wheat, changes due to tempering 272-275 Monoamino nitrogen in potato tubers, skins, monoamino, in potato sprouts 624 and sprouts 624,628-634 Nitrogen-free extract in sunflower and com Moniliasitophila, enzymic action 778 silage 881-888 Moodna ostrinella, similarity to Pectinophora Noctua virescens. Syn. Heliothis virescens. gossypiella 831-832 Noctuelia— Mosaic disease of lettuce 737-740 rufofascialis, similarity to Pectinophora Mugho pine. See Pinus mughus. gossypiella 829-830 Mustard substitutes 117-140 thalialis. Syn. ¿V. rufofascialis. Myrosin, effect on yield of volatile oil from Noctuidae, similarity of certain species to Chinese colza seed 130-131 Pectinophora gossypiella 833 Myzus persicae, carrier of mosaic disease of Nodule Bacteria of Leguminous Plants lettuce 738-739 (paper) 543*556 Navy bean nodule bacteria cultures, effect on Nonadditive factors in correlation and causa- milk 550 tion 563-564 Nebuliunt sp., seeds host of Sitophilus oryza.. 410 Nonlinear relations in correlation and causa- Nectaria (later Colonectria) graminicola, con- tion 564-565 idia cause of "snowmold" , 19 Nonprotein nitrogen in potato sprouts 623 Neidig, Ray E. (paper): Sugar Beet Top Si- Non-spore-forming bacilli in canned ripe lage ; 537-542 olives 377-379 Neidig, Ray E., Snyder, Roberts., and Hick- Nutritive ratio of sunflower and corn silage. 881-888 man, C. W. (paper) : Sunflower Silage Di- Oats. See Avena sativa. /'' gestion Experiment with Cattle and Odontites rubra, host of Urophlyctis magnus- Sheep 881-888 iana 3x3 Oct. i, 1920-Mar. 15, 1921 Index 901

Page Pectinophora— Page Oecophoridae, similarity of one species to gossypiella, similar I,epidoptera 807-836 Pedinophora gossypiella 814-816 malvella, similarity to P. gossypiella 809 Oedemalophorus— Pediculoides ventricosus, parasite of Sito- kellicolti, similarity of O. venapunctus 827 philus— paleaceus, similarity of O. venapunctus 827 linearis 443 stramineus, similarity of 0. venapunctus 827 oryza 421

venapunctus, n. sp 827-828 Peltier, George Iv. (paper) : Influence of Tem- Oil, volatile, in Chinese colza seed 127-132 perature and Humidity on the Growth of Okra. Sec Hibiscus esculenlus. Pseudomonas citri and Its Host Plants Olethreutidae, similarity of certain species to and on Infection and Development of the Pectinophora gossypiella 822 Disease 447-506 Olives, bacteria in cans 375-379 Pénicillium— Olpidium viciaet cytological similarity to biforme, enzymic action 779 Urophlyctis alfalfae fc 309 cameniberti, enzymic action 778 Onion Smudge (paper) 685-722 glaucum, enzymic action 778-779 Opius— sp., attacking wheat treated with formalde- fletcheri as a Parasite of the Melon Fly in hyde 215 Hawaii (paper) 423-438 Perilampus hyalinus, parasite of Neodiprion humilis, parasite of Ceratitis capitata 424 lecontei 757-758 Organic- Perkins, H. Z. K., et al. (paper): Purther iron compounds, availability to rice plants Studies in the Deterioration of Sugars in in calcareous and noncalcareous soils 50-54 Storage 637-653 matter, effect on— efficacy of chlorin disinfectants Ssr-iio Permanence of Differences in the Plots of an Pusarium-wilt of tobacco 529 Experimental Field (paper) 335-356 influence of copper sulphate in water.. 200-203 Pe-tsai. See Brassica campestris pekinsis. Phalaena bipunctalis. Syn. Pachyzancla bi- Orthoclase solutions, concentration of potas- punctalis. sium not a measure of availability to wheat Phalonia ccphalanthana, n. sp 825-826 seedlings 615-621 Phaloniidae, similarity of one species to Pec- Oryza sativa, growth on calcareous soil 38-58 tinophora gossypiella 825-826 Osmotic pressure— Phaseolus vulgaris, mineral content of cotyle- in plants 156-157 dons 875-876 of dry seeds 592-593 Pheuylalaniu in potato protein 624 Overwintering of Gibberella saubinetii 14-15 Phenylthiourca in allyl and crotonyl isothio- Oxalate, ferric, avalability to rice plants in cyanate 127 calcareous and noncalcareous soils 50-54 Philips, A. G., Carr, R. H., and Kennard, Oxid— D. C. (paper): Green Feed versus Anti- calcium, in potato tubers, skins, and sprouts 633 septics as a Preventive of Intestinal Dis- magnesium, in potato tubers, skins, and orders of Growing Chicks 869-873 sprouts 633 Phelum pratense— potassium, absorption by plants 616-617 host of Gibberella saubinetii 16 Oxidation oí potassium, effect on availa- shelter plant of Pyrausta ainsliei 839 bility 619-621 Phoma alliicola— Oxygen, effect on hypertrophy of conifers.. 259-262 parasite of A Ilium spp 687-688 Pachyzancla bipunctalis, similarity to Pecti- similarity to Colletotrichuvi circinans 718 nophora gossypiella 830 PJioroccra— Pak-choi. See Bras sica campestris chinensis. claripennis, parasite of Neodiprion lecon- Paltodora siviiliella. Syn. Isophrictis simi- tei 757-758 liella. comslocki, parasite of Pyrausta sp 843 (Panzeria) Pyraiistomyia penitalis, parasite of Phosphate- Pyrausta ainsliei 843-844 calcium, effect on growth of plants 40-44 Paraformaldehyde— in normal and mottled citrus leaves 166-190 injury to seed wheat 211-244 in soil extract 387-394 physical properties 218-223 sodium, effect on availability of potas- Paragonimus— sium 616-617 lung fluke 193-195 Phosphoric acid. See Acid, phosphoric. parasite oí Melania 198 Phosphorus— Para-oxybenzyl isothiocyanate, difference in bean cotyledons 878 from crotonyl isothiocyanate 135 in normal and mottled citrus leaves 166-190 Parantkrene palmii. Syn. Zenodoxus palmii. in southern poultry feeds 143 Pathological Anatomy of Potato Blackleg water-soluble in wheat, changes due to (paper) 325-330 tempering 272-275 Peanut nodule bacteria cultures, effect on Phycitinae, similarity of certain species to milk 550 Pectinophora gossypiella 831-832 902 Journal of Agricultural Research

Physa— Page Pinus—Continued Page nuitalli, susceptibility to copper salts 199-200 montícola— occidentalis, susceptibility to copper salts.. 199 host of Neodiprion lecontei 757 Physoderma— hypertrophied lenticels 255-266 açrosiidis, morphology 3i3~3I4 viughus, host of Neodiprion lecontei 757 butmio, morphology 313 palustris, host of Neodiprion lecontei 757 calami, morphology 314 pinaster, calciiugous nature 34 (Cladochytrium)— ponderosa— butomi, similarity to Urophlyctis alfalfae.. 305 host of Ncodiprioii lecontei 757 ßammulae 305 hypertrophied lenticels 253-266 maculare, similarity to Urophlyctis alfalfae. 306 var. scopuhrum, hypertrophied len- comari, morphology 313 ticels 253-266 eleochardis, morphology 3I3 resinosa— gerhardli, morphology 313 host of Neodiprion lecontei 757 graminis, morphology 313 hypertrophie* lenticels 255-266 hipurides, morphology 314 rigida, hypertrophied lenticels 255-266 iridis, morphology 313 strobus— maculare, morphology 313 host of Neodiprion lecontei 757 menlhae, morphology 313 hypertrophied lenticels 255-266 menyanthis, method of germination 314 sylvestris— (Protomyces) menyanthis, similarity to host of Neodiprion lecontei 757 Urophlyctis alfalfae 305 hypertrophied lenticels 255-266 schroeteri, morphology 313 taeda, host of Neodiprion leccmici 757 spargani, morphology 314 virginiana— speciostim, morphology 314 host of Neodiprion lecontei 757 vagans, morphology 313 hypertrophied lenticels 255-266 zeae-maydis, morphology 313 Pipunculus— Physopsis, intermediate host of Schistosoma industrius, parasite of Eutetlix tenella 250-251 haeviatobium and S. mansoni 198 vagabundus, parasite of Euiettix tenella... 250-251 Phytolacca, host of Gibber ella saubinclii 16 Planorbis callioglypliis— Picea— intermediate host of Schistosoma haemato- canadensis, hypertrophied lenticels 255-266 bium and 5. mansoni 198 . viariana, hypertrophied lenticels 255-266 susceptibility to copper salts 199 pungens, hypertrophied lenticels 255-266 Plant growth, influence of cold 151-160 rubens, hypertrophied lenticels 255-266 Plants,transpiration, correlation and causa- Pigweed. See Amaranthus hybridus. tion 575-585 Phnpinella nigra, host of Urophlyctis kriege- Platyedra vilella, similarity to P. gossypiella.. 809 riana 313 Platynota— Pine— flavedana, similarity to P. rostrana 823 Austrian. See Pinus austriaca. rostrana, similarity to Pectinophora gossy- jack. See Pinus banksiana. piella 821-822 loblolly. See Pimis taeda. longleaf. See Pinus palustris. Pod-borer, tamarind. See Siiophilus linear is. maritime. See Pinus pinaster. Polarization of sugars in storage 638-653 mugho. See Pinus viughus. Polygonum— red. See Pinus resinosa. hydropipcroides, food plant of Pyrausia Scotch. See Pinus sylvestris. ainsliei 838 scrub. See Pinus virginiana. incarnatum. Syn. P. lapathifolium. shore. See Pinus contorta. lapathifolium, food plant of Pyrausta ains- silver. See Pinus montícola. liei 838 western yellow. See Pinus ponderosa. pennsylvanicum, food plant of Pyrausta "white. See Pinus strobus. ainsliei 837-844 yellow. See Pinus ponderosa. persicaria, food plant of Pyrausta ainsliei... 838 Pink bollworm, similar lepidoptera 807-836 Polynetna eutetlixi, parasite of Euiettix tenella. 250 Pinus— Poncirus trifoliata, influence of temperature austriaca, host of Neodiprion lecontei 757 on— banksiana— development of Pseudonwnas citri 483-488 host of Neodiprion lecontei 756-757 growth 459-471 |i hypertrophied lenticels 255-266 rest period 459 I caribaea, hypertrophied lenticels 255-266 Potash— / contorta, host oí Neodiprion lecontei 757 in plants grown with— S; coulteri, hypertrophied lenticels 255-266 ferrous sulphate and gypsum 43 r ' eldarica, host of Neodiprion lecontei 757 sodium bicarbonate and sprayed with excelsa, hypertrophied lenticels 255-266 lime and iron salts 46 marítima, hypertrophied lenticels 255 See Potassium. Oct. i, 1920-Mar. 15, 1921 Index 903

Potassium— Page Rain, influence in dissemination of spores of Page chloric!— Gibber ella saubinelii 12-13 adsorption by plants 616-617 Rattlesnake venin, ineflicacy of echinacea effect on concentration of soil solution 393 against 75-77 concentration in orthoclase solutions not a Reaction, soil, effect on Fusarium-wilt of to- measure of its availability to wheat seed- bacco 528-529 lings 615-621 Red clover nodule bacteria cultures, effect on fiuorid, effect on yield of volatile oil from milk 550 Chinese colza seed 130-131 Red pine. See Pinus resinosa. hydroxid, effect on yield of volatile oil from Reducing sugars— Chinese colza seed 130-131 in grapefruit 359-373 in cropped and uncropped soils 663-667 in sugars in storage 638-653 in normal and mottled citrus leaves 166-190 Relation of the Calcium Content of Some Kan- in soil extract 387-394 sas Soils to the Soil Reaction as Determined in southern poultry feeds 143 by the Electrometric Titration (paper). 855-868 oxid, absorption by plants 616-617 sulphate, effect on concentration of soil Relation of the Soil Solution to the Soil ex- extract 388-389 tract (paper) 381-395 Potato. See Solanum tuberosum. "Resting," relation to chilling of plants 159 Poultry feed mixtures, potential acidity and Rhizobaclerium japonicum, name given by alkalinity 141-149 Kirchner to soybean nodule bacterium 551 Privet. Sec Ligustrum aurea. Rhizopus— Prolin in potato protein 624 nigricans, similarity to R. iritici 761 Propiouic acid. See Acid, propionia sp., attacking wheat treated with formalde- Protein— hyde 215 calorics in various poultry feeds 147 trilici, secretion and action of amylase... 761-789 crystals due to potato blackleg 326-330 Rhoads, Arthur S., et al. (paper): Hypertro- in Chinese colza seed 127 phied lyCnticels on the Roots of Conifers and in sugar beet top silage 538-540 Their Relation to Moisture and Aeration 253-266 in sunflower and corn silage 881-888 Rhus copallina, water lenticels 256 Proteins, effect on freezing-point depression Rhyncholus laiinasns. Syn. Caulophilns lat- of seeds 593 inasus. Proteus bacilli in canned ripe olives 377-379 Rhynchophora attacking com in storage.. 605-614 Pruning— Rhynchophorus linearis. Syn. Sitophilus Unc- influence in stimulating growth of plants.. 155 arts. top, effect on hypertrophy of conifers 258 Rice, growth on calcareous soil 38-58 Psecadia delliclla. Syn. Ethmia delliella. Rice Weevil, (Calandra) Sitophilus oryza (pa- Pscudomonas— per) 409-422 citri, influence of temperature and hu- Ripening of sweetcom, effect of climatic tem- midity 447-506 perature 795-805 japanica, possible name for cowpea-soybean Robinia, host of Gibberella sanbinetii 16 nodule bacteria 551 Rootrot of cereals caused by Fnsariuw spp. radicicola. Syn. Bacilhis radicicola. and Gibberella saubinetii 2 tumefaciens, causal organism of bacterial Rottboellia exáltala, immunity to Sclerospora crowngall 295 spontanea 671 Pterophoridae, similarity of one species to Rubus, host of Gibberella saubinetii 16 Pectinophora gossypiella 827-828 Rudbeckia— Pyralidae, similarity of certain species to pallida. Syn. Brauneria alrorubens. Pectinophora gossypiella 828-834 purpurea. Syn. Brauneria purpurea. Pyrausta— Runtex— ainsliei— britannica, host of Urophlyctis major 313 control 843-844 crispus, food plant of Pyrausta ainsliei 838 hosts 837 scutatus, host of Urophlyctis rubsaameni 313 seasonal history 839-840 Rusk citrange, influence of— mtbilalis, similarity of P. ainsliei 837 obumbratalis. Syn. P. ainsliei. humidity on development of Psaidotnonas penitalis, similarity of P. ainsliei 837 citri 494-497 Pyraustinae, similarity of certain species to temperature on development of Psettdo- Pectinophora gossypiella 829-830 monas citri 471-488 Pyrauslomyia penitalis, parasite of Pyrausta temperature on growth 459-471 ainsliei 843-844 Russian thistle. See Salsola kali var. tenui- Pyroder ces rileyi, similarity to— folia. Pectinophora gossypiella 820 Rye. See Sécale céréale. Telphusa mariona 813 Saccharum spontaneum, host of Sclerospora Zenodochium citricolella 818-819 spp 669-684 Ragweed. See Ambrosia irifida and A. arte- Salobrana tecomae. Syn. Clydonopteron tcco- misiacfolia. tnae. 904 Journal of Agricultural Research Vol. XX

Salsola kali var. tenuifolia, host of Eutettix Page Shaw, R. H., and Wright, P. A. (paper): A Pajre tendía 247 Comparative Study of the Composition of Sambucus canadensis, water lenticels 256 the Sunflower and Com Plants at Differ- Sanícula— ent Stages of Growth 787-793 menziesii, host of Urophlyclis pluriannu- Shore pine. See Pinus contorta. latus 312 Shrinkage of grapefruit in storage 3^0-372 spp., blisterlike galls on 299 Sida sp., food plant of Telphxisa mariona 812 Sap- Siderocarpus flcxicaulis, ic-jd plant of Acdcmo- composition in orange leaves 182-187 ses kaesilans 816 pressure, relation to hypertrophy 260 Silage— Sarothamnus scoparius, growth in calcareous sugar beet top 537-542 soil 35 sunflower, digestion 881-888 Sawfly, LeConte's. Sec Neodiprion kcontei. Silicate, calcium, effect an growth of plants... 40-44 "Scab" of onions. See Colletotrichum circi- Silica— nans. in potato tubers, skins, and sprouts 633 Scavenger worm. See Pyroderces rileyi. in normal and mottled citrus leaves 166-190 Schinia reclifascia. Syn. Dagisara rectifascia. in plants grown with ferrous sulphate and Schistosoma— gypsum 42 haematobium, parasite of Bullinus, Planor- in plants grown with sodium bicarbonate bis, and Physopsis 198 and sprayed with lime and iron salts 46 japonicum— in soil extract 387-394 cause of schistosomiasis 193,198 Silver pine. See Pinus monticola. parasite of Blanfordia 198 Sinapis— tnansoni, parasite of Bullinus, Planorbis, alba, white mustard 117, 123, 125-126 and Physopsis 198 brassicata, classification 119 Schwartz, Benjamin (paper): Effects of X- chinensis, classification 119 Rays on Trichinae 845-854 júncea var. napiformis. Syn. Brassica Schistosomiasis, caused by blood flukes 193 na pi form is. Scirpus, host of Gibberella saubinetii 16 pekinensis, classification 119 Sclcrospora— Sitophilus— graminicola, conidia 679 granarius— javanica, difference from Sclerospora philip- allied to .S. oryza 409 pinensis 679 description 613-614 maydis, difference from Sclerospora philip- distinguishing characters 605-606 pinensis 679 synonymy 613 philippinensis, causal organism of downy linearis— mildew of maize 669-684 life history 440-443 sacchari, conidia 679 parasite of Tamarindus indiens 439-446 spontanea, n. sp 669-684 parasites 443 Sclerotinia minor, n. sp., the Cause of a Decay oryza— of Lettuce, Celery, and Other Crops control 422 (paper) 331-334 description 610-612 Scofield, C. S., and Harris, J. Arthur (paper): distinguishing characters 605-606 Permanence of Differences in the Plots of food 410-411 an Experimental Field 335-356 life history 411-421 Scotch pine. See Pinus sylveslris. parasites 421-422 Scrub pine. See Pinus virginiana. synonymy 610 Season, effect on— Skins, Irish potato, composition 623-635 physical state of soil 397-404 Smartweed borer. See Pyrausta ainslici. ripening of sweetcorn 798-799 Smudge, onion. See Colletotrichum circinans. Sécale céréale, host of Gibberella saubinetii.... 1-32 ' 'Snowmold," caused by Fusarium spp 19-20 Seed wheat, injury from formaldehyde 209-244 Snydcr, Robert S., et al. (paper): Sunflower Seeds, mustard, substitutes 117-140 Digestion Experiment with Cattle and Seedling-blight of cereals caused by Gibberella Sheep 881-888 saubinetii 5 Soda in plants grown with— Seedlings, wheat, availability of potassium in ferrous sulphate and gypsum 42 orthoclase solutions 615-621 sodium bicarbonate and sprayed with lime Septicemia, incfficacy of echinacea against.. 72-74 and iron salts 46 Sequoia spp., reported immunity from hyper- Sodium- trophied lenticels 255 bicarbonate— Serum, blood, effect on efficacy of chlorin effect on growth of rice 44-47 disinfectants 89-110 value as disinfectant 86-110 Sesbania cavanillesii. Syn. Daubentonia longi- hypochloritc, value as disinfectant ,fWi 10 folia. in normal and mottled citrus leaves 166-190 Shallots. See A Ilium ascalonicum. in soil extract 387-394 Oct. i, 1920-Mar. 15, 1921 Index 905

Sodium—Continued. Page Starch—Continued. Page phosphate, effect on availability of potas- in plants, influence of cold in transforming sium 616-617 to sugar 153-154 in southern poultry feeds 143 in sweetcorn 795 805 Sodiura-toluene-sulphon-chloramid. See Stenomidae, similarity of one species to "Chloramin T." Pectinophoragossypiella 8r6-8i7 Soil- Stewart, G. R., and Martin, J. C. (paper): availability of iron 33-62 Effect of Various Crops upon the Water effect of— Extract of a Typical Silty Clay Loam carbonate of lime on availability of iron.. 47-49 Soil 663-667 season and crop growth on physical Stewart G. R.,ctal (paper): Relation of the state 397-404 Soil Solution to the Soil Extract 381-395 various crops on water extract 663-667 Stigmonota tristrigana. Syn. Laspcyresia effect on composition of potato tubers, tristrigana. skins, and sprouts 632-634 Stipa, host of Gibber ella saubinetii 16 moisture, effect on Fusarium-wilt of tobacco 529 Stizolobium vines, availability of iron to rice reaction, effect on Fusarium-wilt of to- plants in calcareous and noncalcarcous soils 50-54 bacco 528-529 Storage, effect on— relation of calcium content to reaction. .. 855-868 Colletotrichum circinans 713-716 solution, relation to soil extract 381-395 deterioration of sugars 637-653 temperature, effect on Fusarium-wilt of grapefruit 357-373 tobacco 527-528 Strophostyles nodule bacteria cultures, effect Solauin in potato sprouts 623 on milk 550 Solanwm tuberosutn— Strymon melinus, pest of Malvaceae 834 attacked by blackleg 325-330 Studies in Mustard Seeds and Substitutes: I. berries host of Gibber ella saubinetii 16 Chinese Colza (B rassica campestris chinolei- composition of tubers, skins, and sprouts.. 623-635 fera Viehoever) (paper) 117-140 effect on water extract of soil 663-667 Studies on the Life History and Habits of the vascular discoloration of tubers 277-294 Beet Leafhopper (paper) 245-252 Solidago spp., shelter plants of Pyrausta Study of Some Poultry Feed Mixtures with ainsliei 839 Reference to Their Potential Acidity and Solids, soluble, in grapefruit 359-372 Their Potential Alkalinity: I. (paper)... 141-149 Soluble solids in grapefruit 359-372 "Subculoyd ínula and Echinacea," medici- Solution, soil, relation to soil extract 381-395 nal properties 65-84 Somasia helianthana. Syn. Eucosma helian- Sucrose in grapefruit 359-372 thana. Sugar Beet Top Silage (paper) 537-542 Some Changes in Florida Grapefruit in Stor- Sugar— age (paper) 357-373 in grapefruit 359-372 Some lycpidoptera Likely to Be Confused in plants, influence of cold in transiórnt^ng with the Pink Bollworm (paper) 807-836 from starch 153-T54 Sorghum— in sweetcorn 795 805 susceptibility to formaldehyde injury 241 Sec Andropogon sorghum. Sugars,detetüoration in storage 637-653 Soybean-cowpea bacteria, comparison with Sulphate— Bacillus radicicola and B. radiobacler 545-554 calcium, effect on— Soybean nodule bacteria cultures, effect on availability of potassium 616-617 milk 550 growth of plants 40-44 Spalangianorpha fasciatipennis, parasite of copper, toxity to snails 196-208 Sitophilus oryza 422 ferrous— Spathimeitenis spinigera, parasite of Neodi- and molasses, availability to rice plants prion lecontei 757*758 in calcareous and noncalcareous soils.. 50-54 Spelt. See Triticum spelia. availability to rice plants in calcareous Species, new 114, 333, 431, 678, 811, 812-813, and noncalcareous plants 50-54 814-816, 818-819, 823-824, 825-826,827-828 effect on action of gypsum 38-44 Spore-forming bacilli in canned ripe olives. 377-379 in normal and mottled citrus leaves 166-190 Sprouts, Irish potato, composition 623-635 in soil extract 387-394 Stahl, C. F. (paper): Studies on the Life potassium, effect on concentration of soil History and Habits of the Beet Leafhop- extract 388-389 per 245-252 Sulphur— Staphylococci in canned ripe olives 377-379 in normal and mottled citrus leaves J 66-190 Staphylococcus aureus, effect of chlorhi disin plants grown with ferrous sulphate and infectants upon 88-110 gypsum 42 Starch- in southern poultry feeds 143 hydrolysis by Rhizopus tritici 765-783 Sunflower plants, comparison with com for in Chinese colza seed 127 silage 787-793 goo Journal of Agricultural Research Vol. XX

Sunflower Silage Digestiou Experiment -with Page Teosintc. See Euchlacna luxurians. Page Cattle and Sheep (paper) 881-888 Teras toslrana. Syn. Platynota rosirana. Swanson, C. O., Latshaw, W. L., and Tague, Terminalia catappa, host of Ceratiiis capifata. 423 E. L. (paper): Relation of the Calcium Tetanus, inefficacy of echinacea against 67-70 Content of Some Kansas »Soils to the Soil Tetrachlorid, carbon, effect in stimulating Reaction as Determined by the Electro- sprouting of potato tubers 623 metric Titration 855-868 Thiocyanate, allyl, formation during macera- Sweet clover nodule bacteria cultures, cifect tion of Chinese colza seed 131 on milk 550 Thiodia hclianlhana. Syn. Eucosma helian- Sweetcom, effect of climatic temperature on thana. ripening processes 795~8o5 Thiourca in ally! and crotonyl isothiocyanate. 127 Swine, inheritance of syndactylism 595-604 Thiourethane, allyl, formation during mac- Syudactylism, black, and dilution in swine, eration of Chinese colza 131 inheritance of 595-604 Thistle, Russian. Sec Salsola kali var. tcnui- Tague, E. L. (paper): Changes Taking Place folia. in the Tempering of Wheat -'71-275 Thuja spp., reported immunity from hyper- Tague, E. L., et al. (paper): Relation of the trophied lenticels 255 Calcium Content of Some Kansas Soils to Tigbec. Sec Coix lachryma-jobi. the Soil Reaction as Determined by the Tilley, F. \V. (paper): Investigations of the Elcctromctric Titration 855-868 Germicidal Value of Some of the Chlorin Tamarack. See Larix laricina. Disinfectants 85-110 Tamarind Pod-Borer, Sitophilus Unearis Timothy. See Phleum pratense. (Herbst) (paper) 439-446 Titration, electrometric, indication of relation Tamarind. See Tamarindus indicus. of calcium content of soil to reaction 855-868 Tamarindus indicus, host of Sitophilus Tobacco stems, availability of iron to rice Unearis 439-446 plants in calcareous and noncalcareous soils. 50-54 Tamarrha bittenella. Syn. Ethmia biltenclla. Top pruning, effect on hypertrophy of coni- "Tan disease" of fruit trees 263 fers 258 Tannate, ferric, availability to rice plants in Tobacco. See Nicoliana iabacum. calcareous and noncalcareous soils 50-54 Tortricidae, similarity of cetaain species to Tartaric acid. See Acid, tartaric. Pectinophora gossypiella 821-822 Tartrate, ferric— Trailing arbutas. See Epigaca repens. availability to rice plants in calcareous and Transmissible Mosaic Disease of lyCttucc, A noncalcareous soils 50-54 (paper) 737-740 effect on growth of rice 42-44 Transpiration— Taxus— effect on hypertrophy of conifers 259-262 brevifolia, hypertrophied lenticels 255-266 of plants, correlation and causation 575-585 cuspidafa, hypertrophied lenticels 255-266 Trichinae, effect of X-rays 845-854 spp., reported immunity from hypertro- Trichinella spiralis, effect of X-rays 845-854 phied lenticels 255 Trifolium— Tecoma radicans, food plant of Clydonopieron monianum, host of Urophlyctis bohémica... 313 tecomae 832 spp., hosts of Gibberella saubinetii 16 Telephusa viariona, u. sp 812-813 Temperature— Trilicum— at which fruit buds freeze 655-662 repens, host of Gibberella saubinetii 16 climatic, effect on ripening processes in spelta, host of Gibberella saubinetii 1-32 sweetcom 795-805 spp.— effect on— hosts of Giberella saubinetii 1-32 carbohydrate transformation in resting seed, injury from formaldehyde 209-244 potato tubers 623 seedlings, availability of potassium in formaldehyde injury to seed wheat 236-240 orthoclase solutions 615-621 growth of Colletotrichum circinans 696-697 Tropical almond. See Terminalia catappa. growth of Pseudomonas citri 447-506 Trumpet flower vine. See Tecoma radicans. hydrolysis of starch by Rhizopus tritici... 767- Trypanosoma cquipcrdum, inefficacy of echi- 768,777-778 nacea against 80-82 tempering of wheat 272-275 Trypanosomiasis, inefficacy of echinacea influence of copper sulphate on organisms against 80-82 in water 200-201 Tsuga canadensis, hypertrophied lenticels. 255-266 relation to deterioration of sugars in Tubercle bacillus, effect of chlorin disinfect- storage 642-653 ants 98-100 to which soils can be cooled without freez- Tuberculosis, inefficacy of echinacea against. 77-79 ing 267-269 "Tuberin " in potato sprouts 624 soil, effect on Fusarium-wilt of tobacco.. 527-528 Tubers, Irish potato, composition 623-635 Tempering of wheat 271-275 Turnips. See Brassica rapa. Tcncbroides manritanicus, parasite of Sitophi- Thyridiuae, similarity of one species to Pecti- lus oryza 422 nophora gossypiella 828-S29 Oct. r, 1920-Mar. 15, 1921 Index 907

Typlia— Page Page latifolia, shelter plant of Pyrausta ainslici.. 839 Volatile oil in Chinese colza seed 127-132 sp., food plant of Dicymotomia julianalis. 831 Volutella circinans. Syn. Colletotrichzcm Tyrosin in potato sprouts 624 circinans. Ulmus, host of Gibbcrella saubinelii 16 Walker, J. C. (paper): Onion Smudge 685-722 Uranotes melinus. Syn. Strymon melinus. Water— Urocysiis cepulae, similarity to Collelotrichum caused to become unfree by seeds 587-593 circinans 718 effect on— Urophlyciis— availability of iron in soil 54-58 alfalfae, parasite of alfalfa 295-324 hypertrophy of conifers 258-262 bohémica, haustoria 313 tempering of wheat 272-275 (Cladochytrium) pulposa, parasite on Chen- extract of soil, effect of various crops. ... 663-667 opodhim spp 300 Water-soluble— hemisphaerica, similarity of U. alfalfae in nitrates in cropped and uncropped soils.. 663-667 growth 303 phosphorus in wheat, changes due to tem- kriegeriana— pering 272-275 haustoria 313 Weed, beggar, nodule bacteria cultures, Syn. U. hemisphaerica. effect on milk 550 leproidea, similarity of U. alfalfae in growth. 303 magnusiana, haustoria 313 Weevil— major, haustoria 313 avocado. See Heilipus lauri. (Physoderma) leproidea, parasite of beets.. 300 rice. Sec Silophilus oryza. plurianmdatus, similarity to U. alfalfae 312 Welcome, C.J., et al. (paper): Further Studies pulposa— in the Deterioration of Sugars in Storage. 637-653 apical apparatus on vegetative cells 306 West, Frank I,., and lidlefscn, N. K. (paper): haustoria 313 Freezing of Fruit Buds 655-662 riibsaameni— Western yellow pine. See Pinus ponderosa. haustoria 313 Weston, William H. (paper): Another Coni- nuclear behavior 308 dial Sclerospora of PhilippineMaizc 669-684 Vaccinium— corymbostim, influence of cold in stimulat- Wheat- ing growth 156-160 tempering 271-275 sp., calcifugous nature 34 See Trilicum spp. Valerianate, ferric, availability to rice plants White pine. Sec Pinus strobus. in calcareous and noncalcareous soils 50-54 Wild crab. See Malus coronaria. Valeric acid. See Acid, valeric. Willard, H. F. (paper): Opius fletchcri as a Valin in potato protein 624 Parasite of the M clon Fly in Hawaii 423-438 Variations in Colletotrichum gloeosporioides Wind, influence in dissemination of spores of (paper) 723-736 Gibberella saubinelii 11-12 Varietal resistance to Fusarium-wilt of Wissadula— tobacco 530-533 lozani, food plant of Zenodoxus palmii 826 Variety, new 118-140,521,525-536 sp., food plant of Telphusa mariona 812 Vascular Discoloration of Irish Potato Tubers Worm, scavenger. See Pyroderces rileyi. (paper) 277-294 Wright, P. A., and Shaw, R. H. (paper): A Ventilation in bams 405-408 Comparative Study of the Composition of Vermicularia— the Sunflower and Com Plants at Different circinans. Syn. Colletotrichum circinans. Stages of Growth 787-793 gloeosporioides. Syn. Colletotrichum gloeo- Wright, vScwall (paper): Correlation and sporioides. Causation 557-585 "Vermiculariose." See Colletotrichum cir- Xanthium communis, shelter plant of Py- cinans. rausta ainsliei 839 Verticillium albo-airum, cause of vascular X-rays, effect on trichinae 845-854 necrosis of potato tubers 277 Yeasts in canned ripe olives 377-379 Vetch nodule bacteria cultures, effect on milk. 550 Yellow pine. See Pinus ponderosa. Viburnum americanum, influence of cold in Zea mays— stimulating growth (PI. 21) 151-160 effect on water extract of soils 663-667 Viciafaba— host of Physoderma zeae-maydis 313 composition of green and albino leaves 182 host of Sclerospora sPontaneum 669-684 effect on water extract of soil 663-667 in storage, attacked by Rhynchophora.. 605-614 shelter plant of Pyrausta ainslici 839 Viehoever, Amo, Clevenger, Joseph F., and Ewing, Clare Olin (paper): Studies in Zenodochium citricolella, similarity to Pec- Mustard Seeds and Substitutes: I. Chinese tinophora gossypiella 817-818 Colza (Brassica campestris chinoleifera Zenodoxus palmii, similarity to Pectino- Viehoever) 117-140 phora gossypiella S26-827 O