COMPATIBILITY OF CYCLOPOID COPEPODS WITH MOSQUITO INSECTICIDES

Larvivorous copepods (Macrocyclops, Mesocyclops and Acanthocyclops) we re tested for their sensitivities to commonly used mosquito larvicides and adulticides. The cyclopoids were not harmed by Bacillus thuringie nsis (H-14) (B.t.i.) or larviciding oil. Control of mosquito larvae in field trials was accelerated by applying B.t.i. at the same time cycl opoids were introduced to a breeding site. Among adulticides tested, t he cyclopoids were least sensitive to permethrin. Field trials demonst rated that permethrin does not harm cyclopoids when applied at label s pecifications.