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N. Elliott ; R. Kieckhefer ; D. Walgenbach | 1990
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N. Elliott ; R. Kieckhefer | 1986
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N. Elliot ; R. Kieckhefer ; D. Walgenbach | 1988
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R. Kieckhefer ; J. Gellner ; W. Riedell | 1995Accurate prediction of yield loss caused by cereal aphids in small grains involves assessment of the aphid population density on plants, the duration of their feeding, and the growth stage of the crop at the time of feeding. In this research, ap[...]
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W. Riedell ; R. Kieckhefer | 1995Cereal aphid infestations have considerable impact upon productivity and profitability of United States agriculture. A comparison study of the influence of different aphid species (Russian wheat aphid, Duraphis noxia Mordvilko: greenbug, Schizap[...]
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G. Hein ; N. Elliott ; G. Michels ; R. Kieckhefer | 1995
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N. Elliot ; R. Kieckhefer | 1987
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T. Voss ; R. Kieckhefer ; B. Fuller ; M. Mcleod ; D. Beck | 1997Populations of the English grain aphid, Sitobion avenae (F.), and the bird cherry-oat aphid, Rhopalosiphum padi (L.), develop in some years on maturing wheat, Triticum aestivum (L.), in the Dakotas and western Minnesota. Two experiments were con[...]
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R. Kieckhefer ; B. Kantack | 1988
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R. Kieckhefer ; N. Elliott ; W. Riedell ; B. Fuller | 1994The effect of greenbug, Schizaphis graminum (Rondani), infestations on yield components of early- and late-planted spring wheat, Triticum aestivum L., were measured in 2 successive years in eastern South Dakota. Greenbug populations in plots gen[...]
