分别在小菜蛾体内的菜蛾绒茧蜂处于卵期、早期幼虫和中期幼虫时,饲喂小菜蛾2龄幼虫亚致死剂量(=LC10)的阿维菌素和氟虫睛,研究上述杀虫剂处理对寄主体内菜蛾绒茧蜂结茧率和羽化率的影响。结果表明:在菜蛾绒茧蜂处于卵期、早期幼虫和中期幼虫时,饲喂小菜蛾LC10剂量阿维菌素处理的菜叶后,菜蛾绒茧蜂的结茧率分别下降26.6%,22.8%和5.8%,饲喂小菜蛾LC10剂量氟虫睛处理的菜叶后,菜蛾绒茧蜂的结茧率分别下降76.9%,42.5%和18.5%。上述阿维菌素处理对菜蛾绒茧蜂成虫羽化率影响不显著,但上述氟虫睛处理可显著抑制菜蛾绒茧蜂成虫羽化率,在菜蛾绒茧蜂处于卵期、早期幼虫和中期幼虫时,饲喂小菜蛾LC10剂量氟虫睛处理的菜叶可导致菜蛾绒茧蜂成虫羽化率分别下降53.1%,36.1%和47.8%。结果显示,即便是对寄主小菜蛾幼虫很低的剂量(LC10剂量)也会显著危害小菜蛾幼虫体内的菜蛾绒茧蜂的生长发育。此外,饲喂小菜蛾幼虫亚致死剂量杀虫剂对菜蛾绒茧蜂生长发育的影响与杀虫剂种类及蛾绒茧蜂发育阶段有关。 When the diamondback moth Plutella xylostella was fed on the 2nd instar larvae of Plutella xylostella in the egg stage, early larvae and mid-stage larvae of the diamondback moth, the sublethal dose (= LC10) Effect of agent treatment on cocoing rate and emergence rate of the parasitoids Aphelenchoides. The results showed that the cocoon formation rate of the parasitoid was decreased by 26.6% after feeding the LC10-avermectin-treated leaves of Plutella xylostella in egg stage, early larvae and mid-stage larvae, respectively. 22.8% and 5.8%, respectively. After feeding on the leaf of the diamondback moth (Plutella xylostella) treated with flubendiam, the cocoon formation rates of the parasitoid decreased by 76.9%, 42.5% and 18.5%, respectively. The abamectin treatment had no significant effect on the emergence rate of the adults of the parasitoid Apanteles plutellae. However, the treatment of these insects could significantly inhibit the emergence rate of the adults of Plutella xylostella, At mid-stage larvae, cabbage leaves treated with flubendazole at the LC10 dose of Plutella xylostella decreased by 53.1%, 36.1% and 47.8%, respectively. The results showed that even a very low dose (LC10 dose) to the host diamondback moth larvae significantly affected the growth and development of the diamondback moth Plutella xylostella larvae. In addition, the effects of sublethal insecticides fed on the diamondback moth larvae on the growth and development of the parasitoid Apanteles plutellae were related to the types of insecticides and the developmental stages of the parasitoids.