Abstract
Diflubenzuron, 1 (4-chlorophenyl)-3-(2, 6-difluorobenzoyl) urea, showed good control efficacy on larvae of the rice water weevil, although leaf injury due to adults was not affected. Attempts were made to clarify the mechanism of insecticidal action of diflubenzuron against the rice water weevil. The number of eggs oviposited and the hatch-ability of eggs were determined when adults were fed on rice seedlings treated with diflubenzuron. It was concluded that control efficacy by diflubenzuron was caused by the inhibition of hatching of eggs.
