Diseases of Forest and Shade Trees, Ornamental and Miscellaneous Plants
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Historic, archived document Do not assume content reflects current scientific knowledge, policies, or practices 0. M. Darrow, Jlrtioulture A Pomology, Bureau of ^lant Industry. " . MARYLAND Issued By Supplement 37 < . Diseases of Forest and Shade Trees, Ornamental and Miscellaneous Plants in the United States in 1 923 March 30, 1925 BUREAU GF PLANT INDUSTRY UNITED STATES DEPARTMENT OF AGRICULTURE . .• ». .. PIMT DISEASj^ SURVF-:^ 1923 List of collaborators of the Plant Disease Survey who have made the principal contribution to the 1^23 annual summary. It should be understood that i lany other collaborators and pathologists have assisted in gathering data wit! in the States but the follov/ing list in- eludes those who actually furnished state reports to the V/ashington office. p. A 1 ?5 bfi ^,fi ....... Miles Nebraska Goss A. Gardner Nevada ...c. Lantz T OTifl Ariz ....... G» Brown . .0. Butler D. C. George PI. PatL. jiA i.V zvt-*. n^^as. • • • • iio^vj* .. .J. A. Elliott New Mexico . .R. F, Crawfo rd n a 1 3 f nrri is.. .J. T. Barrett 7/. T. Horne L. M. Massey W. S. Fields R. s. Kirby P.olrir'Ar'n.. .c. D. Learn North Carolina.. .A. c. Foster Ellsworth Bethel North Dakota. .H. L. Bolley nnnnpr»ti pnt . .G. P. Wanda V/einger E. M. Stndda rd . .A. D. Selby • • • • • * . Ad f5rn<^ ^C/J_C^VVClit^« . J F. H. c. Young "PI r\ r* X J- X J.1 Lidr{ n •••••••• . .0. Burg P. er R. C Thom.as G. P. V7(=> V"^ 0 y 'Freda Detmers rip, 4" n r^P \ 'A . - .. .T. H. Mp K "I" n . - . - Td fihn , . .0. W. Hi ] r> p r- T Pn rd uregon.. *......». .H. p. Barss Henry Schmitz s. M. Zeller TTIiTinic;.. ... • J—LXXXiv«/Xo* • • * • • . .H. V/. Anderson c. E. Owens L. R. Tehon Pennsylvania. .c. R. Orton Gardner \7. A. McCubbin E. Melhus H. \7. Thurston H. S Conard L. 0. Qverholtz an sas ^ . ...L. E. Melcher;: w. Browning R. p. V/liite W. A. Snell E. A. Stokdyk South Carolina^. » .c. A. Ludwig V-ir l(p,y-l -{-1 3 f» . ...... D. Valleau J. Petry ...... Lou isiana G W. Edgerton A. T. Evans J. Morse Tennessee » • ...L. R. Hesler Maryland .. .0. E. Temple Taubenhau R. A. Jehle Richards Massachusetts. A V. Osmun Vermont . .B. F. Lutman W- n. Davis r) Fromme P. Anderson Washington . .P. D. Heald Coons B. F. Dana . .Se ct. PI. Path. rthur Frank Mississippi . .D. c. Neal Vfest Virg inia . , .N. J. Giddings H. D. Barker E. C Sherwood Missouri . ..A. c Burrill Anthony Berg V/. E. Maneval V/isconsin R. E. Vaughan Montana . .H. M. Jennison V/y oini ng Av e n N ols on D. B. Swingle W. N. Christopher 349 DISEASES OF FOREST AITD SHADE TREES, ORNMIEj^JTAL A!ID I.HSCELLAinOUS PLAI!TS " • III THE UI'JITEd' STATES HI 1,2 ^ • Plant Disease Reporter March 30, I925 Supplement 37 Prepared by G. HaiTiilto-r^-- Martin CONTENTS Diseases of forest, shade Diseases of ornamental shrubs and ornamenta-1 trees 35^ and plants 3S4 Conifers 35^ Diseases of miscellaneous Hardwoods 359 plants. ." ' Foreword ; .\ _ This summary of the diseases of fbreSt and shr.de trees, ornam-ental and miscellaneous plants in the United States in 1*323 follows the same general plan as those of the preceding years. The sources upon which the information is based are as follows: (l) 'collaborators, (2) specialists in the Office -of Forest Pathology, (3) "^^"ticles in botanical journals, and (4) special reporters. Many reports of new occurrences were ree-^ived for I923 both for states and for the United States. In the accompanying summary these first occurrences have been noted" by sym^bols 'before each individual report. Nev/ York, Mississippi, Minnesota, Florida and Connecticut contributed the largest number of first reports. Many occurrences are given which have been obtained from literature, f r-am --the- he-rbarium-'-of Pathological Collec- tions, or from past records of the Plant Disease Survey. Quito a number of diseases -have been omitted due to. their unimportance or to the fact that they have been reported in other years. 'It is not the object of this summary to enumerate all -of tlie diseases that have been reported during the year,' but to give facts concerning only s om^e of the m.ore important ones. Owing to the nature of the data it is presented herewith in list; ' form • •7-;-^- V/here specimens are not indicated the report is based on the authority of the person cited. The' date given is that of its earliest re- ported appearance in I923. Reports from British Columbia are given on ac- count of the probable occurrence of .the' disease being also in Washington and Idaho. The following symbols are used:* indicates a specVm-n in Pathologi- cal Collections; + preceding disease .indicates 'the first report of the disease to the Plant Disease Survey; + preceding state, indicates the first report from the state to the Plant Disease Survey. References have been given and in some instances brief abstracts made of recent articles which may be of service to those who do not have access to all the botanical journals. A list of collaborators is given on the opposite page. The nam.es of the special reporters are as follows: 350 Boyce, J. S. Harter_, Li L. Posey, G. B. Dewey, L. H. Haskell, R. J. Rhodes, A. L. Poster, A. C. Jenkins, Anna E. Strayer, P. R. Gravatt, A. E. Kinskem, E. A. Tisdale, W. B. Gravatt, A. H. Martin, J. F. Weimer, W. L. Gravatt, G. F. MoConnick, F. A. Weir, J. R. Graves, Arthur McCulloch, L. Zappe, M. p. Hahn, G. G. Ninman, J. H. DISEASES OF CONIFERS CEDAR, V/HITE ( Chamaecyparis thyoides) Rust caused by Gymno sporangium ellisii (Berk.) Pari. Connecticut - fruiting abundantly on the witches brooms, first report made in 1922, Bethany, New Haven County. (Clinton) Prior reports: Alabama, Connecticut, *Delav/are, Florida, *Massa- chusetts, *New Jersey, *Pennsylvania and Rhode Island. CEDAR, CALIFORNIA INCENSE ( Libocedrus decurrens) Rust caused by Gymn o s p o r a ng ium blasdaleanum (D. & H. ) Kern Oregon - locally severe; Rujada, Lane County, tJune l/* (Boyce) Prior reports: *Oregon and *California. CEDAR (Juniperus procumbens and J. sabina) Phomops is juniperovora Hahn; Pennsylvania - (A. E- Gravatt) CEDAR, COLORADO JUNIPER ( Juniperus scopulorum) . Rust caused by Gymn o s p o r a ng i urn globosum Pari. +Colorado - (Learn), prior report: North Dakota. +Phom2£§_L§. i^^^ipe^'Q'^^ora Hahn; Illinois - (A. E. Gravatt) CEDAR, RED (Juniperus virginiana) . Rust caused by Gy mno s por a ng ium globosum Pari, *New York - common in Hudson Valley, May 15* (Chupp) Iowa - an unusually large amount of sporulation occurred. (Melhus) Prior reports: /ilabama, Connecticut, *Indiana, Iowa, Kansas, Massachusetts, Minnesota, *Mississippi, *Missouri, New York, North Dakota, Pennsylvania, *South Carolina, Vfest Virginia and V/isconsin. Rust caused by Gymn os por a ng ium .juniperi-virginianae Schw. Reported from *New York, Connecticut, *New Jersey, South Carolina and Ohio. Prior reports: *Alabama, Delaware, Georgia, *Indiana, *Iowa, Kansas, Louisiana, Maryland, Massachusetts, Minnesota, Mississippi, Missouri, Montana, Nebraska, New Jersey, North Dakota, Pennsylvania, South Dakota, Texas, Virginia, West Virginia and Wisconsin. Phomops is .juniperovora Hahn; Pennsylvania, Illinois - (A. E- Gravatt) Prior reports : Illinois , Iowa, Kansas, Minnesota, Nebraska, New York, Ohio, and Pennsylvania. CEDAR (^niperus spp.) Phomops is .juniperovora Hahn; +Missouri - in a nursery; new for state- '^Maneval) New York - reported on Salix nigra '; Onondago County, September 15:. (Chupp) Rust caused by Melamps ora . bigelowii Thuem. + +NewYork - reported on Salix discolor , +S. lucida -and +_S. amyg - daloides, Tompkins County, September 2. ( Chupp) Minnesota - Itasca County. (Sect. PI. Path.) Oregon - abundant; Homestead InnJ Hood River County. (Boyce) Prior reports: *Colorado, Connecticut, Idaho, *Illinois, *Indiana, Iowa, *Kansas, *Michigan, Minnesota, Montana, *Oregon, Pennsylvania, Tennessee, Texas, Virginia, V/ashington, Vfest Virginia and V/yoming. Rust caused by Melamps or a larici-capraea rum Kleb. (M. saliois caprae 'Vint.) +Oklahoma - Payne County, October 25. (Stratton) Prior reports: Minnesota, Montana and Ohio. Powdery mildew ca-used by Unc inula ' salicis (DC.) V/int. New York probably statewide; Tompkins County, August 18. (Chupp) Iowa - (Melhus ) ' Oregon - abundant and sometimes caused premature leaf fall;. Port- land, Multnomah County, October 28. (Boyce). Prior reports: Connecticut,. Illinoi-s, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, •Minnesota, Mississippi, *Montana, New Hampshire, *New York, North Dakota, Ohio, Oregon, Vermont, Virginia, Washington and V/iscohsin. Canker - cause undetermined ' Connecticut- - similar to European canke5:' but microscopical exami- nation failed to verify the cause. (Clinton) ' ' Flyspeck - c use undetermined ' y.ji'k - September Nev/ reported on Salix discolor ; Onondago County , 10. (Chupp) ' WOOD' DESTROYING FUI^GI Wood rot caused by polyporus schweinitzii Pr. Minnesota - saprophytic on trunks of Picea m.ariana and Pinus res inosa and on the roots of Pinus divaricata . (Sect. Pl. Path.) " Wood rot caused by Polyporus ' anccps Pk. Minnesota - very comm.on wood rot of conifers. (Sect. PI. Path.) Rot caused by Por ia incrassata (B. & C.) Burt. Florida -'during 'the past year the Pl;int Pathologist was called to St. Petersburg where a iLiniber company reported the loss, of thousands of dollars worth of lumiber because of a fungous organism which causes rot to timber. The fungus Poria incrassa ta) v/as found very prevalent in all parts of the large shed where it was destroying sawed boa rds, floor- ing, piles, joints, v;indow-frames and ouilding paper. To control this disea'se it was necessary to resaw all the lumber, put in a nev/ concrete floor and thoroughly disinfect the entire establishment. '( Weber) Recent literature : Humphrey, C. J. 'The destruction by the fungus" Poria in - crassata " of coniferous timber in storage and when used in the construe ti'on of buildings.