Abstract

Studies were made on the effect of five common insecticides viz endrin 0.19 parathion 0.05% malathion 0.1 endosulfan 0.1% and lindase 0.1% on the survival and emergence of the two egg parasites viz. Trichogramme australicum Gir and Trichogramme japonicum Ashm. The mortality of the parasite was noticed upto 10 days in T. australicum as against 21 days in T. japonicum when allowed on sugarcane leaves sprayed with insecticides indicating the relative susceptibility of T. japonicum to the insecticides. Among the insecticides ondosultan and lindane were found to be least toxic to the parasites. The emergence of both the species of the parasites, though wes not affected much due to surface spray application of the insecticides on the parasitised host eggs, parathion was found to affect emergence to a certain extent while the other insecticides tested recorded an emergence rete equal to that of the control.

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