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GrainGenes Reference Report: JEE-96-352

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Reference	JEE-96-352
Title	Plant damage and yield response to the Russian wheat aphid (Homoptera : Aphididae) on susceptible and resistant winter wheats in Colorado
Journal	Journal of Economic Entomology
Year	2003
Volume	96
Pages	352-360
Author	Randolph TL [ Show all 7 ]
Abstract	Plant damage and yield response to the Russian wheat aphid, Diuraphis noxia (Mordvilko), were evaluated on a susceptible (TAM 107) and a resistant (RWA E1) winter wheat, Triticum aestivum L., in three Colorado locations in the 1993 and 1994 crop years. Russian wheat aphid was more abundant on TAM 107 than on RWA E1. Russian wheat aphid days per tiller were greater at the higher infestation levels. Yield losses as a result of Russian wheat aphid infestation occurred most of the time with TAM 107 but rarely with RWA E1. Seed densities were reduced at higher infestation levels in TAM 107 at two locations. Russian wheat aphids per tiller had a negative relationship to yield in TAM 107 but not in RWA E1. In TAM 107 yield decreased as aphid densities increased, but yield remained constant regardless of initial aphid abundance on RWA E1 in all environments. Seed densities were reduced at higher infestation levels in TAM 107 at two locations. The resistance conferred by the Dn4 gene seems to be an effective management approach across a range of field conditions
Keyword	[ Hide all but 1 of 25 ] aphid aphids control crop crop year damage densities density diuraphis noxia diuraphis-noxia field gene homoptera host plant resistance management quality resistance resistant russian wheat aphid seed triticum triticum aestivum wheat winter yield

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