Biever, K. D.

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Section VIBiological and Cultural ControlsDEVELOPMENT OF A BIOLOGICAL CONTROL SYSTEMFOR LEPIDOPTERAN PESTS OF CRUCIFERSK. D. BieverUSDA, ARS, 3706 W. Nob Hill Blvd., Yakima, WA 98902A special research project is being conducted to develop and validate a modelsystem for the maximization of biological control agents in multipest managementprograms using 3 lepidopteran pest species and cole crops as the model system.This program emphasizes population monitoring and early season inoculativereleases of parasitoids against the imported cabbage worm, cabbage looper,alfalfa looper, and the diamondback moth.During the 1988 season we evaluated 4 treatments: pests only, 2 parasiterelease rates and parasites plus viruses. Plots were separated by at least3/4 mile and consisted of 1,000 cabbage plants. Populations of pests andbeneficials were monitored on a weekly basis. During the 1989 season8 parasitoids were evaluated at 3 release rates: 150, 300, and 600 pairs/acreand plots were 1 acre in size. All three release rates reduced both pestpopulation levels and insect damage at harvest. Improved rearing techniqueshave been developed for laboratory production of the parasitoids; currently18 species are being maintained and evaluated for suitability in inoculativerelease management systems.26

Development of a Biological Control System for Lepidopteran Pests of Crucifers

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Development of a Biological Control System for Lepidopteran Pests of Crucifers

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