Wednesday, 20 November 2002

This presentation is part of : Display Presentations, Subsection Fa. Host Plant Resistance

Status of Russian wheat aphid resistant feed barley for dryland western United States

Do Mornhinweg1, P. P. Bregitzer1, Frank B. Peairs2, T.A. Randolph2, and M. Koch2. (1) USDA-ARS, 1301 N. Western, Stillwater, OK, (2) Colorado State University, Dept. of Bioagriculture Science and Pest Management, 200 W. Lake, Ft. Collins, CO

The Russian wheat aphid (RWA) Diuraphis noxia (Mordvilko) has had such a devastating effect on grain yield of barley in the dryland areas of eastern Colorado that barley is no longer an option in field rotations. One hundred and fourteen advanced generation Russian wheat aphid-resistant feed barley germplasm lines in an Otis background, developed by the USDA-ARS in Stillwater, OK and Aberdeen, ID, were field tested with the cooperation of Colorado State University in Stoneham, CO in the spring of 2001. The agronomic performance of these lines was evaluated against the performance of Otis and Otis + Gaucho. The majority of the resistant germplasm lines significantly outperformed Otis as well as Otis + Gaucho.

Species 1: Homoptera Aphididae Diuraphis noxia (Russian wheat aphid)
Keywords: aphid resistance, barley

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