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A Bibliography of the Northern Corn Rootworm, Diabrotica Longicornis

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A Bibliography of the Northern Corn Rootworm, Diabrotica Longicornis SURVEY A BIBLIOGRAPHY OF THE NORTHERN CORN ROOTWORM, Diabrotka /ong/com/s (Say), and the WESTERN CORN ROOTWORM, Oiabrotlca .Ir^Hero LeConte (Coleoptera: Chrysomelidae) W. H. Luckmann • H. C. Chiang • E. E. Ortman • Martha P. Nichols Biological Notes No. 90 ILLINOIS NATURAL HISTORY SURVEY Urbana, Illinois — April, 1974 STATE OF ILLINOIS Department of Registration and Education Natural History Survey Division Distribution of the Northern Corn Rootworm Diabrolica longicortii- 1966 EH 1970 Distribution of the Western Corn Rootworm Diabrotica virgifera 1960 ^^^1965 MM 1970 COVER ILLUSTRATION — Northern corn rootworm odult (lower left) ond western corn rootworm adult (upper right). Photo by Wilmer Zehr. A BIBLIOGRAPHY OF THE NORTHERN CORN ROOTWORM AND THE WESTERN CORN ROOTWORM W. H. Luckmann, H. C. Chiang, E. E. Ortman, and Martha P. Nichols This bibliography is limited to papers dealing with eggs are often deposited at a greater depth in the soil. the northern corn rootworm, Diabrotica longicornis Following oviposition, eggs develop slightly and diapause (Say), and the western corn rootworm, Diabrotica through fall and winter. In the com belt area of the USA virgifera LeConte. The 426 titles in the present list wore the eggs begin to hatch in June and the first adults ap- obtained primarily from standard reference sourrcs and pear in July. Some eggs will not have hatched by the time the personal files of tiie authors. the first adults appear. Thus, the egg stage lasts about 10 The northern corn rootworm and the western corn months, although, experimentally, a few eggs of the rootwoiTn are major pests of corn in the corn belt region northern corn rootworm have been shown to go through of north-central USA. Distribution extends beyond this two winters. area, but damage by the larva is usually negligible south The lar\'ae feed on corn roots and concentrate near of latitude 30° N. The northern corn rootworm is most the base of the plant. The larvae consume the roots, abundant in North America in an area roughly extending decreasing nutrition supplied to the ear, and in strong from latitude 37° to 45° and longitude 80° to 100° N W. wind and rain storms plants with moderate to severe The western corn is dispersing east rootworm to the and root damage may become lodged. The duration of the it is currently most abundant in an area roughly extending laival plus pupal stages is about 1 month. In laboratory from latitude 40° to 45° and longitude 85° to 105° N W. cages, adult rootworm females will live about 2 months Numerous isolated infestations of each species be- occur and oviposit for about 3 weeks, during which time they yond these general boundaries south to the Mexican will deposit about 300-350 eggs. In the field, adult life border and into Ontario, Canada, with new infestations probably does not exceed 5—6 weeks. There is a pre- reported each year. t\\o species arc indigenous to The oviposition period of 2-2'/2 weeks. Northern com root- North America. woiTOS are very difficult to maintain in the laboratory, The western corn is product of modern rootwomi a and culturing has not been very successful. The western agriculture. It intensified as problem in irrigated corn a corn rootwomi can be cultured in the laboratory, but the in Nebraska about 30-40 ago. to the years Up 1955, egg diapause does not permit continuous mass rearing. western corn rootwomi was found only in Nebiaska and The adults may remain for a considerable time in the I portions of Colorado, Kansas, South Dakota, and western field where they emerge. Later they disperse, seeking Iowa. Since then it has moved eastward and northward pollen in late-maturing fields, alfalfa, and ornamental into major corn-producing states. It develo]3cd resistance plants. Northern com rootworm adults congregate on to the cyclodienc .soil insecticides in the 1950"s and the silks and in tips of ears of corn, whereas western corn distribution of the resistant strain expanded northward rootworm adults have less tendency to congregate and and eastward. they will be found on other parts of the plant as well as The biology and bcha\ior of the two species are very the ears. Thus counts made in ear tips will show a pre- I similar. In nature, corn is probably the only host, though t'ominance of northern corn rootwonn adults, whereas 'it has been shown experimentally that the immatures of casual \isual counts in the same field and at the same iboth species can develop to varying degrees on certain time show a predominance of western corn rootworm iother species of grasses. Adults feed on the pollen, silks, adults. and kernels of corn and on the fruiting structures of many Northern corn rootwonns and western corn rootworms jother plants, including weeds. The li\e together and have similar habits, and there is some i northern and the \\cstcrn corn rootworms have interaction between the two species. Several researchers only one generation per year. Most eggs are laid in August have reported a displacement of the northern com root- in the soil in cornfields. The eggs are usually concentrated worm by the western corn rootworm. Interspecific lin the rows at the base of the corn plants in nonirrisated matings have been observed in the fields, and F, progeny fields and between rows in fields with irrigation. Most of crosses were produced in the laboratory. The Fi adults -ggs of the northern corn rootwomi will be deposited in have the phenotype of the western corn rootworm. :he upper few inches of soil. Ovipositional behavior of Larvae of northern com rootworms and ^^•estern corn he western corn rootworm is slightly difTerent, as females iviposit many of their eggs between the plant rows and root\\orms are resistant to the cyclodiene insecticides over much of their range. Organophosphate and carbamate This paper, in the Biological Notes series, is published with special project soil insecticides applied at jilanting time are used for unds. Dr. W. H. Luckmann is head of the Section of Economic Entomology 't the Illinois .\atural History Survey, Professor, Illinois Agricultural and control. Rotating com with other crops is a positive lAperiment Station. Dr. H. C. Chiang is a Professor of Entomology at the I University of Minnesota. Dr. E. E. Ortman is Head of the DenartmenI of means of control. Usualh-, only the lar\ae are damaging, l-ntoinology, Purdue University. Martha P. Nichols is a Research Associate, 1 nicr national Programs and Studies, University of Illinois. but adults congregating and feeding on fresh silking ears can interfere -with pollination, aiul in these instances Stations of the University of Illinois, the University of insecticides are applied for adult control. Minnesota, and Purdue University in cooperation with The brief introduction above, providinc; some general USDA Cooperative States Research Project "Soil Arthro- information about the western corn rootwoiTn and the pods 316-15-97" and USEPA project "Bionomics and northern corn rootwonn was written to assist the student Management of Soil Arthropod Pests 802547-5." Coop- and the researcher. All references in the bibliography erating institutions and principal state investigators in were examined, except those preceded by the symbol #. these projects are listed below: "Listing of References by Rootwonn Species" has been A Mi.s.souRi — M. L. Fairchild, Principal Investigator, included, following the numbered bibliography entries, GSRS and USEPA Projects so that users of the bibliography will be able to tell readily A. J. Keaster which of the numbered papers deal with which species of Indiana E. E. Ortman, Coordinator Corn Soil In- com rootworms. A list of abbreviations used in the bibliography appears at the end of the paper. sects Research F. T. The search of the literature was assisted by Cindy Turpin LeutlofT and Susan Jarvis. O. F. Glissendorf, editor, Illi- Illinois VV. H. Luckmann nois Natural Histoi-y Sui-vey, edited the manuscript. Their Iowa J. C. Owens collaboration is gratefully acknowledged. Nebraska — Z. B. Mavo This bibliography is a contribution of the Illinois Natural History Survey and the Agricultural Experiment Ohio G. J. Musick BIBLIOGRAPHY Anonvmou.s. 1926/1928. Injurious insects and other 1964. Rootworm resistant to insecticide. Wis. pests. Kans. Agr. Exp. Sta. Dir. Rep. 1926/1928:67-82. ir. Exp. Sta. Bull. 574:21. 1932/1933. Rootuorm control frees com crop 1966. Crop pests. Egg count determines root- infestation. Crops Soils :24-25. illus. of costly hazards. 111. Agr. Exp. Sta. Annu. Rep. 1932/ worm & Mag. 18(9) 1933:138. 1968. Com rootworm. Farm Quart. 23(2) :93. 1933/1934. Proper rotation frees corn of illus. danger from rootworms. 111. Agr. Exp. Sta. ;\nnu. Rep. 1968. Rootworms. Double band insecticide- 1933/1934:138. treated fertilizer for com rootwonn control. Crops & Soils Mag. 20(7) :29. 4. 1952. You can control com rootwonn. Wallaces' Farmer & Iowa Homestead 77(5) :28. 1969. Furadan receives rootworm Ial>el. Agf. Chem. 24(4) :45. illus. 5. 1953. Prevent damage hy corn rootworms. 1971. Young lowan u.ses math formulas m Wallaces' Farmer & Iowa Homestead 78(6) : 14. unlock rootworm problems. Agr. Chem. 26(3) :20, 31,f , 6. 1953. .Science stalks rootworni in the com belt. AixsLiE, G. G. 1914. The western com root \N-orm. J. Co-op Grain Quart. 11(4) :49-51. illus. Econ. Entomol. 7(4) :322-324. 7. 1953. They .stopped com rootworms. Wallaces' Anderson, R. 1953. Chemicals pay off on com rod- Farmer & Iowa Homestead 78(21 ) :22-23. illus. worm. Fann J. 77(35) : 35, 158. illus. 8. 1954. Head off those rootworms! Wallaces' 27. Apple, J. W. 1957. Insecticide in fertilizer kills rooc- Farmer & Iowa Homestead 79(5) :37.
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