The toxicity and safety of field recommend concentrations of 12 kinds of commonly used insecticides were assessed a- gainst pupae and adults of Diadegma semiclausum under laboratory conditions. Contact toxicity of pupae was tested by immersion method, and contact and oral toxicities of adults were determined with dry film residue method and sugar mixed insecticides method. All insecticides, with the exception of spinosad, had various degree effects on adult emergence form pupae dipped by insecticides, and all in- secticides were harmless to adults from insecticide-treated pupae, except indoxacarb, spinetoram and chlorpyrifos which caused 31.1%, 100% and 100% mortalities, respectively. The results of contact toxicities to adults showed that lufenuron and chlorantraniliprole had no effects on adults, whereas diafenthiuron and indoxacarb caused 21.3% and 41.7% mortalities, respectively, abamectin and emamectin benzoate caused 53.6% and 60.8% mortalities, respectively, and spinosad, sophocarpidine, spinetoram, chlorfenapyr, chlorpyrifos and beta-cypermethrin had extremely significant effects on adults, which caused more than 80% mortalities. The results of oral toxicities to adults showed that lufenuron was safe for adults, whereas abamectin and sophocarpidine caused 45.8% and 61.3% mortalities, respec- tively, and emamectin benzoate, diafenthiuron, spinosad, chlorantraniliprole, indoxacarb, spinetoram, chlorfenapyr, chlorpyrifos and be- ta-cypermethrin were extremely harmful to adults, which caused more than 90% mortalities. Of insecticides tested, except that spinosad was safe for pupae and lufenuron was harmless to adults, other insecticides had different degree effects on pupae or adults of parasitoid. The data presented in this paper provided useful information on the selection of compatible insecticides with D. semiclausum.
Journal of Shanxi Agricultural Sciences