Impact of Some Insecticides Recommended for Sugarcane Insect Pests on Emergence and Parasitism of Trichogramma japonicum (Ashmead)

Five insecticides viz malathion, endosulfan, imidaclorprid, triazophos and chlorpyriphos were evaluated for their impact on some biological parameters of egg parasitoid Trichogramma japonicum (Ashmead). Endosulfan (@ 394 g ai ha⁻¹) was found to be comparatively safe to the parasitoid with least effect on the emergence and parasitization of parents as well as their progeny while, malathion (@ 1250 g ai ha⁻¹) and chlorpyriphos (@ 175 g ai ha⁻¹) were highly deleterious. The toxic effects of Imdiclorprid (@ 20 g ai ha⁻¹) and triazophos (@ 600 g ai ha⁻¹) were in between endosulfan and malathion.