Abstract
Development of new repellent chemicals specifically to control crop damage by birds may be cost-prohibitive. Instead, the use of compounds developed for other pest control needs may be more practical. Thus, we conducted 2-cup feeding trials with singly caged red-winged blackbirds (Agelaius phoeniceus) and brown-headed cowbirds (Molothrus ater) to test the repellency of a new seed treatment insecticide, imidacloprid (proposed common name for Miles Incorporated NTN33893). Both redwings and cowbirds were strongly deterred (P < 0.05) from feeding on rice seed treated with imidacloprid at 620 and 1,870 ppm. When applied to wheat seed, imidacloprid effectively reduced (P < 0.05) consumption by redwings at rates as low as 165 ppm
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