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[目的]明确米尔贝霉素对朱砂叶螨(Tetranychus cinnabarinus)种群不同发育阶段的作用特点,为米尔贝霉素的合理应用提供科学依据。[方法]采用叶碟喷雾法测定了米尔贝霉素和阿维菌素对朱砂叶螨种群不同发育阶段的致死作用。[结果]在相同的温湿度条件下,朱砂叶螨不同发育阶段对2种药剂的敏感性不同。米尔贝霉素和阿维菌素对幼螨LC50值分别为0.0376、0.0237 mg/L,对雌成螨的LC50值分别为0.1860、0.1519 mg/L,在0.8 mg/L时对叶螨的产卵抑制率分别达82.56%和74.26%。[结论]2种药剂对幼螨和雌成螨的毒力高于卵,而米尔贝霉素对朱砂叶螨幼螨和雌成螨的毒力略低于阿维菌素,但米尔贝霉素杀螨速效性和对雌成螨产卵抑制作用较阿维菌素好(P<0.05)。
[Objective] The research aimed to clarify the effect of milbemycin on Tetranychus cinnabarinus population at different developmental stages and provide a scientific basis for the rational application of milbemycin. [Method] The lethal effect of milbemycin and abamectin on different developmental stages of Tetranychus cinnabarinus population was determined by leaf disc spray method. [Result] Under the same conditions of temperature and humidity, the sensitivity of two species of medicaments to spider mites at different developmental stages was different. The LC50 values of milbemycin and abamectin for larvae were 0.0376 and 0.0237 mg / L, respectively, and the LC50 values were 0.1860 and 0.1519 mg / L for adult mites respectively. The production of spider mite at 0.8 mg / L The egg inhibition rates were 82.56% and 74.26% respectively. [Conclusion] The virulence of the two chemicals to larva and female mites was higher than that of eggs, while the virulence of milbemycin to larva and mite were slightly lower than that of abamectin, The quick-acting mite control and oviposition inhibition of female adults were better than abamectin (P <0.05).