Toxicity of some insecticides and biopesticides to Diadegma fenestralis Himage and Cotesia plutellae (Kurdyumov), two parasitoids of diamondback moth.

Studies on the effect of insecticides and biopesticide on two major parasitoids of Plutella xylostella i.e, Diadegma fenestralis and Cotesia plutellae indicated that malathion proved highly toxic to both the parasitoids and achook (azadirachtin), fenvalerate and cypermethrin + Bt showed less adverse effect on parasitoid emergence.