Toxicity evaluation of newer insecticides against Trichogramma chilonis Ishii under laboratory conditions

Abstract

The laboratory studies were conducted on the evaluation of relative safety of newer insecticides to Trichogramma chilonis Ishii, reared on UV irradiated and unirradiated eggs of Corcyra cephalonica. The results revealed that the maximum (>59%) and minimum (<21.0%) Parasitization was obtained in the treatment of azadirachtin 1500 ppm and a combination product of lambda cyhalothrin 9.5% + thiamethoxam 12.6% ZC, respectively. The results indicated that azadirachtin 1500 ppm, chlorantraniliprole18.5 SC, spiromesifen 22.9 SL and imidacloprid 17.8 SL were relatively safer compounds in terms of their toxicity to T. chilonis. Hence these insecticides can be safely included in biointensive IPM programmes for managing insect pests in agro-ecosystems.