Flight of Honey Bee Colonies, as Affected by Bidrin Applied on Ladino Clover2

Abstract

The flight activity of honey bees, Apis mellifera L., leaving colonies was measured to evaluate the effects of Bidrin® (3-hydroxy- N,N -dimethyl- cis -crotonamide dimethyl phosphate), applied on Ladino clover, and to test flight activity as an indicator of insecticide effects on colony performance. Flight activity was depressed significantly, approximately 40%, on the second day after application. Bee mortality increased on the day of application.