WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Monday, March 25, 2019


Browse on keywords: insect ID biocontrol

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Search results on 03/25/19

3180. Simmonds, B. and D. Brosten. 1991 Oct.. Biocontrol blitz targets Russian wheat aphid.. Agrichemical Age 34(9):8-10, 35.
The article describes current efforts to develop biocontrols for the Russian wheat aphid. Parasites and predators are being released and tested in a number of areas, including WA and ID. Wheat varieties are being screened for resistance to the pest. No one expects biocontrols to eliminate the need for occassional insecticide treatments, but hope they will reduce the frequency of chemical control by keeping the aphids below the economic threshold. A national IPM program has been established for RWA control.

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.

10709. Sloan, A.J.. 1990. UI evaluating rapeseed as a natural pesticide.. Growers Guide, Nov. 1990, p. A13.
University of Idaho researchers Matt Morra and Paul Brown have identified two active compounds from the breakdown of glucosinolates that occur in rapeseed. Isothiocyante and ionic thiocyante were measured in the soil, where they are effective in suppressing pests such as wireworms. These compounds are produced synthetically for some common soil fumigants.

10747. Anon.. 1991. Guarding the granary.. Harrowsmith Country Life, Jul/Aug 1991, p. 102.
USDA tests have shown that predatory insects do a better job of controlling stored grain pests than fumigation, and pose no risk of contamination. New regulations are needed to allow introduction of biocontrol insects into grain bins. These bugs can be easily removed during cleaning, but their levels generally do not get high. Using the bugs before harvest will help eliminate residual pests and add to the prevention of a problem.

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