Feeding responses of the parasitoid Trichopoda pennipes (F.) to acetamiprid, cyfluthrin, dicrotophos, indoxacarb, oxamyl, and thiamethoxam were determined in laboratory tests. Trichopoda pennipes adults exhibited repellency to a sugar water food source treated with oxamyl, cyfluthrin, indoxacarb, and acetamiprid and diminution of feeding when they actually fed on sugar water containing any of the insecticides. Although four of the insecticides in this study exhibited antifeedant activity, ingestion of food treated with any of these compounds always resulted in the death of the flies. Therefore, repellency to the insecticides was the only response by the flies that insured their survival.

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