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在实验室条件下测定田间常用的11种杀虫剂对小菜蛾Plutella xylostella(L.)卵寄生性天敌卷蛾分索赤眼蜂Trichogrammatoidea bactrae Nagaraja的影响。结果表明,高效氯氰菊酯、丁醚脲、阿维菌素、多杀霉素、溴虫腈、氟虫腈和杀螟丹对卷蛾分索赤眼蜂成蜂有极明显触杀毒性,成蜂接触药膜8h后的死亡率达到89.31%～100%,丁醚脲、阿维菌素和多杀霉素能极显著降低成蜂的寄生力,溴虫腈和氟虫腈处理卵和幼虫期均显著降低卷蛾分索赤眼的成蜂羽化率,杀螟丹对卷蛾分索赤眼蜂各虫态都有极强的毒性,其处理后成蜂的羽化率几乎都为0。试验结果说明,氟啶脲、茚虫威、苏云金杆菌和虫酰肼对卷蛾分索赤眼蜂成蜂及各发育虫态均较安全,可在田间任何时候使用,而高效氯氰菊酯、丁醚脲、多杀霉素和阿维菌素的使用则应尽量避开卷蛾分索赤眼蜂成蜂期。
The effect of 11 insecticides commonly used in the field on the Trichogrammatoidea bactrae Nagaraja, an egg parasitoid of the diamondback moth, Plutella xylostella (L.), was determined under laboratory conditions. The results showed that alpha-cypermethrin, diafenthiuron, abamectin, spinosad, chlorfenapyr, fipronil and cartap chrysalis had obvious contact toxicity to beetles, The death rate of the film reached 89.31% ~ 100% after 8 h, diafenthiuron, avermectin and spinosad could significantly reduce the parasitism of bees, and the average egg and larval period of fipronil and fipronil Significantly reduced the rate of adult bee emergence of the red thread eye of the moth and the toxicity of the cartap to the various insect states of the red thread bee, and the emergence rate of the processed bees was almost zero. The test results showed that chlorfluazuron, indoxacarb, bacillus thuringiensis and tebufenozide were more safe and safe for T. molitoriana and their developmental states, and could be used at any time in the field. However, beta-cypermethrin and butyl ether The use of urea, spinosad and abamectin should be avoided as much as possible.