Toxicity of spinosad to Plutella xylostella (L.) and its natural enemies
多杀菌素对小菜蛾及其天敌的毒力研究

The toxicities of spinosad to Plutella xylostella and its natural enemies are evaluated in this paper. The results show that spinosad has a high toxicity to P. xylostella and a high efficacy against the pest in fields. Spinosad has a lethal effect on Paederus fuscipes and C. plutellae, but no significant effect on Lycosa psedoannulata. For C. plutellae, the treatment with 1000 times dilution of 2.5% CAIXI causes its mortality of 62.2% after 24h and 88.7% after 36h. The side-effects of spinosad on parasitoid of P. xylostella are very high and should be considered when the pesticide is used.