Abstract
The toxicity of four kinds of insecticide solution, Imidacloprid, Buprofezin, Cartap and MEP on eggs, larvae, prepupae and pupae of Trichogramma japonicum was studied in laboratory. The result suggested that all of the insecticides tested could penetrate into the egg shell of the host and showed different degree of toxicity on wasps. In dipping method, the toxicity of Imidacloprid and Buprofezin was lower than that of other insecticides. The toxicity of Cartap and MEP was relatively higher on the Trichogramma. When Stages of wasp pupae and larvae were treated with MEP, emerged adults died before laying eggs. When prepupal stages were treated with MEP, the treated-generation adult could survive for one day but 80% of the female adults could not oviposit. When stages of wasp eggs were dipped into MEP, the treated-generation adult could oviposit in spite of decreased number of oviposited eggs.
