R
R. W. Kieckhefer
Researcher at Agricultural Research Service
Publications - 22
Citations - 1082
R. W. Kieckhefer is an academic researcher from Agricultural Research Service. The author has contributed to research in topics: Aphid & Rhopalosiphum padi. The author has an hindex of 17, co-authored 22 publications receiving 1012 citations.
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Journal ArticleDOI
Effects of an invading coccinellid on native coccinellids in an agricultural landscape.
TL;DR: Introducing a new species, while resulting in reductions in native species populations, may not increase total coccinellid abundance, and may therefore have no net effect on biological control of aphid pests.
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Influence of within-field and landscape factors on aphid predator populations in wheat
TL;DR: Overall, predator abundance, species richness, and species diversity increased with increasing vegetational diversity in wheat fields and with increasing amounts of non-cultivated lands and increasing patchiness in the surrounding landscape.
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Yield Losses in Winter Wheat Caused by Low-Density Cereal Aphid Populations
R. W. Kieckhefer,J. L. Gellner +1 more
TL;DR: The results showed that the threshold for significant yield loss under these environmental conditions was at the 10 aphid per plant level for the bird cherry oat aphid and the Russian wheat aphid, and 15 apbids per plant for greenbug.
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Effect of aphids and the surrounding landscape on the abundance of Coccinellidae in cornfields
TL;DR: It is determined how the composition and patchiness of eastern South Dakota agricultural landscapes surrounding cornfields and the abundance of aphids in cornfields affected the abundance and biology and ecology of the species of Coccinellidae that inhabit cornfields.
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Root and Shoot Responses to Bird Cherry-Oat Aphids and Barley yellow dwarf virus in Spring Wheat
TL;DR: It is concluded that R. padi infestation caused acute injury to spring wheat plants while BYDV caused chronic injury.