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25℃下,分别在菜蛾绒茧蜂产卵寄生后的第1、3、5、7天(幼蜂分别处于卵、初龄幼虫、中龄幼虫、末龄幼虫期)将20％氰戊菊酯乳油1000倍水溶液以喷雾法施用于被寄生的小菜蛾幼虫。第1天和第7天处理使蜂的存活率明显下降,第1天处理导致育出雌蜂的产卵量低于对照,而第3天和第5天处理使蜂存活率下降幅度相对较小,且第5天的处理引起育出雌蜂的产卵量高于对照。不同时间处理均显著延长了该蜂卵+幼虫的发育历期,其中以第5天延长最为显著。除第3天外,其余时间处理导致育出蜂个体小于对照,且以第1天和第7天处理影响更为显著。羽化雌蜂的寿命均短于对照。对存活率和产卵量进行综合分析表明,氰戊菊酯施用于寄主幼虫对菜蛾绒茧蜂幼蜂的影响随后者发育阶段不同而变化,卵、末龄幼虫期较初龄、中龄幼虫期受到的不利作用更大。
At 25 ℃, respectively, on the 1st, 3rd, 5th and 7th days after parasitism of the parasitoid Apanteles plutellae (eggs were young, the first instar larvae, the middle larvae and the last instar larvae) A 1000-fold aqueous solution of Inulin EC was applied to the parasitized Plutella xylostella larvae by spraying. Day 1 and Day 7 treatments significantly decreased the viability of bees, the first day of treatment resulted in less fecundity than the control, while the third and fifth days of treatment resulted in a relative decrease in the viability of bees Small, and the treatment on the fifth day caused the fecundity of female wasps to be higher than that of the control. The treatment of different time significantly prolonged the developmental period of the eggs and larvae of the bee, of which the first 5 days to extend the most significant. Except Day 3, the rest of the treatments resulted in smaller individuals than controls, and the effects were more pronounced on days 1 and 7. Feathered female bee life shorter than the control. The comprehensive analysis of the survival rate and the amount of spawning showed that the effect of fenvalerate on the parasitoid larvae of Plutella xylostella changed with the developmental stages of the latter. The larval stage is more adversely affected.