SUSCEPTIBILITY OF SCAPTOMYZA FLAVA (DIPTERA: DROSOPHILIDAE) TO INSECTICIDES

摘要

The leaf miner, Scaptomyza flava (Diptera: Drosophilidae), can damage Asian brassicas. Methods of control are required that are compatible with biological control of the lepidopteran pests that also damage this crop. Laboratory bioassays compared thesusceptibility of adult flies and first instar larvae in leaf mines to 12 insecticides registered for use on brassicas and the insecticide abamectin. The efficacy of seven insecticides were compared in two field trials with Joi Choi and Pak Choi, and thesurvival of a larval/pupal parasitoid, Asobara persimilis (Hymenoptera: Braconidae) was assessed. Adult and larval flies were susceptible to nine insecticides. In the field trials, abamectin, deltamethrin, endosulfan and fipronil gave good control of fly larvae. Parasitoids emerged in treatments where fly larvae survived to pupate, i.e. abamectin, endosulfan, maldison, spinosad and indoxacarb.