Cucurbit Genetics Cooperative Report 11:79-82 (article 34) 1988 Levine, E., H. Oloumi-Sadeghi, R.L, Metcalf and R. Lampman Office of Agricultural Entomology and Department of Entomology, University of Illinois, Urbana-Champaign, IL 61801 In the Diabrotica beetles and their rootworm larvae are probably the most costly insect pests of agriculture in the U.S. The combined attacks of […]
R. L. Metcalf
A Report of Cucurbitacin Poisonings in Humans
Cucurbit Genetics Cooperative Report 6:73-74 (article 37) 1983 J. E. Ferguson, D. C. Fischer, and R. L. Metcalf Departments of Entomology and Horticulture, University of Illinois, Urbana-Champaign, IL 61801 The tetracyclic triterpenoid cucurbitacins, bitter substances of the Cucurbitaceae, are highly toxic to mammals with intraperitoneal median lethal dose values for pure Cucs in the mouse […]
Controlling Cucumber Beetles and Corn Rootworm Beetles with Baits of Bitter Cucurbit Fruit and Root
Cucurbit Genetics Cooperative Report 6:79-81 (article 40) 1983 R. L. Metcalf, J. E. Ferguson, Dan Fischer, Richard Lampman and John Andersen Departments of Entomology and Horticulture, University of Illinois, Urbana-Champaign, Illinois 61801 Wild species of Cucurbitaceae are well known for producing the intensely bitter oxygenated tetracyclic triterpenoids, the cucurbitacins (Cucs). These Cucs are kairomones for […]
Bitter Cucurbita Hybrids as Baits for Diabroticite Beetle Control
Cucurbit Genetics Cooperative Report 3:44 (article 25) 1980 A. M. Rhodes, R. L. Metcalf, and E. R. Metcalf University of Illinois at Urbana-Champaign, Urbana, IL 61801 We reported previously (1) that the leaves and fruits of bitter Cucurbita spp., e.g. C. andreana containing up to 0.3% cucurbitacins B and D and C. texana containing up to 0.1% cucurbitacin E-glycoside, were very […]
Bitter Cucurbita spp. as Attractants for Diabroticite Beetles
Cucurbit Genetics Cooperative Report 2:38 (article 23) 1979 R. L. Metcalf, A. M. Rhodes, Jane E. Ferguson and Esther R. Metcalf University of Illinois, Urbana-Champaign, Urbana, IL 61801 The attacks of the striped cucumber beetle, Acalymma vittata, and the spotted cucumber beetle or southern corn rootworm, Diabrotica undecimpunctata howardi, on cultivated Cucurbitaceae and of the corn rootworm, D. u. howardi, northern […]
Insect Associations with Cucurbita in Illinois
Cucurbit Genetics Cooperative Report 1:30 (article 28) 1978 A. M. Rhodes, W. L. Howe, R. L. Metcalf and P. Y. Lu University of Illinois, Urbana, IL 61801 For the past seven years we have evaluated the host preference of several insect species that were attracted to five cultivated and 14 mesophytic and xerophytic wild Cucurbita spp. The […]