【摘要】 为了明确乙唑螨腈、丁氟螨酯和腈吡螨酯对家蚕的安全性，采用叶片饲喂法测定了3种杀螨剂对家蚕3龄幼虫的急性毒性和亚致死剂量对家蚕结茧性能的影响。结果表明，3种杀螨剂对家蚕3龄幼虫的致死中浓度大于2 000 mg/L。3种杀螨剂对家蚕4龄幼虫的上蔟率、结茧率无显著影响，但上蔟后，腈吡螨酯处理的蔟中死亡率和死笼率高于空白对照处理。乙唑螨腈处理的全茧量、茧层量低于对照处理，而蛹体重、茧层率与空白对照无显著性差异；腈吡螨酯500、250 mg/L处理的全茧量、茧层量、蛹体重低于空白对照处理，125 mg/L处理的茧层量、蛹体重显著高于对照处理，3个处理的茧层率显著高于空白对照处理；丁氟螨酯3个处理的全茧量、茧层量、蛹体重、茧层率显著高于对照处理。3种杀螨剂对家蚕低毒，推荐剂量下对家蚕结茧性能的影响较小，可用于桑园防控红蜘蛛。更多还原

【Abstract】 In order to identify the safety of cyetpyrafen, cyflumetofen and cyenopyrafen to Bombyx mor. The acute toxicities to the 3rd instar silkworm larvae, and the effects of sublethal dose to cocooning performance of silkworm were determined by leaf feeding method. The results indicated that the values of LC50to silkworm larvae were more than 2 000mg/L. The three acaricides had no significant effects on the mounting rate and cocooning rate. The mortalities after mounting and mortalities in cocooning frame of cyenopyrafen were higher than blank control. The cocoon weight, cocoon shell weight of cyetpyrafen treatments were lower than blank control treatment, but there were no significant differences in pupa weight and cocoon layer rate between cyetpyrafen and the blank control. The cocoon weight, cocoon shell weight and pupa weight of the treatments of cyenopyrafen 500 and 250 mg/L, were significantly lower than those of the control treatment. The cocoon shell weight and pupa weight of cyenopyrafen 125 mg/L were significantly higher than those of the blank control. The cocoon weight, cocoon shell weight, pupa weight and cocoon shell rate of cyflumetofen were significantly higher than blank control treatment.Therefore, cyetpyrafen, cyflumetofen and cyenopyrafen had low toxic to silkworm and had little effects on the cocooning performance of silkworm at the recommended dose. Cyetpyrafen,cyflumetofen and cyenopyrafen could be used to control mulberry red spider.更多还原