Keywords: 
• Trichogramma chilonis /
• toxicity test /
• safety evaluation

Abstract: Common insecticides, Chlorantraniliprole, Emamectin, Tebuconazole, Nitenpyram, Leucine, Thiamethoxam, Cyantraniliprole and Bacillus thuringiensis were used to determine their effect on an egg parasitoid Trichogramma wasp（Trichogramma chilonis） by using insecticide-membrane method and dipping method, respectively. The results showed that Emamectin, Tebuconazole, Thiamethoxam and Cyantraniliprole were more toxic to Trichogramma wasps at the recommended concentrations in the field, with the mortality rate of the Trichogramma wasps being more than 96% after 6 h exposure. After 6 h exposure the Chlorantraniliprole treatment had a mortality rate of less than 20%, which was not significantly different from that of the acetone treatment（control）. All the 10 insecticide treatments showed effects on emergence rate of the Trichogramma wasps, of which the Chlorantraniliprole treatment had the highest emergence rate, which was not significantly different from the control, and its average survival rate was 87.13%, followed by the Bacillus thuringiensis treatment which had average emergence rates of 81.55% and 80.17%, respectively, when treated at respective concentrations of 25 mg·L^-1 and 33.33 mg·L^-1. The Leucine treatment and the Nitenpyram treatment gave similar effect on the emergence of the Trichogramma wasps, and had average emergence rates of 25.27% and 26.60%, respectively. However, the Tebuconazole, Thiamethoxam, Cyantraniliprole and Emamectin treatments significantly affected the development of eggs, larvae and pupae of the Trichogramma wasps, of which the Emamectin treatment had the highest side effect on the Trichogramma wasps and had an average survival rate of only 7.11%（egg: F10, 44 × 248.16, P＜0.01; pre-pupae: F10, 44 ≤ 468.25, P＜0.01; pupae: F10, 44 ±663.71, P＜0.01）.