WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Saturday, October 20, 2018

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5235. Pike, K. and D. Allison. 1990. Control of small grain aphids on winter wheat.. unpublished research results, WSU IAREC, Rt. 2, Box 2953-A,.
Describes 1989 research results of screening 12-15 insecticides on both hard red and soft white winter wheat at the Irrigated Research Center in Prosser. All insecticides reduced aphid numbers compared with the check. Three aphids were monitored - Russian wheat aphid, bird cherry-oat aphid, and English grain aphid.

6766. Tanigoshi, L.. 1990. untitled. unpublished list, Dept. of Entomology, Washington State Univ., Pullman, WA.
The table lists the natural enemies of the Russian wheat aphid (RWA) Diuraphis noxia, the country of origin, and the release date in WA state. Over ten natural enemies have been released to date.

10682. Simmonds, B. and D. Brosten. 1990. Biocontrol blitz targets Russian wheat aphid.. Agrichemical Age, Oct. 1990, p. 8-10..
Washington State University entomologists have been releasing parasitic wasps since 1988 to help control Russian wheat aphid. USDA_APHIS has released six wasp species, one fly species, and six lady beetle species. The national biocontrol effort against the aphid is part of a broader $2.1 million National RWA IPM program. RWA has infested fields in sixteen western states, and has probably spread near its maximum range. One helpful cultural practice is to eliminate any green host plants in late summer or winter to starve the aphids. Also, planting spring wheat or barley as early as possible can reduce infestations.

10950. Harwood, R.F.. 1989. Countermeasures against Russian wheat aphid in Washington.. EM4835, Cooperative Extension, Washington State Univ., Pullman..
Seven major thrusts for IPM control of RWA are briefly described as part of a national effort. Researchers in Washington are concentrating on aphid population dynamics, natural enemies, insecticides, aphid-resistant cereals, and information dissemination.

10960. Anon.. 1989. Russian wheat aphid control for the Pacific Northwest, spring 1989.. unpublished, Dept. of Entomology, WSU, Pullman, WA.
Scouting procedures for RWA are described. A spray decision table is included to determine if an infestation has reached the economic injury threshold.

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