Abstract: In order to determine the control effects of different pesticides to the Tetranychus urticae and T.truncatus，12 different types of pesticides were selected to conduct field control tests on the two types of spider mite．The results showed that the efficacy of different pesticides against the T.urticae varied greatly at 3 days．The efficacy of 0.5% ivermectin emulsifiable concentrate，43% bifenazate suspension concentrate，30% cyenopyrafen suspension concentrate，and 20% cyflumetofen suspension concentrate was more than 90%，and the lowest efficacy of 1.8% avermectin emulsifiable concentrate was 58.17%．The efficacy of the other pesticides against the T.truncatus was more than 90%，except for ivermectin．The preventive efficacy of different pesticides on T.urticae ranged from 40.30% to 97.70% at 7 days after treatment，and against the T.truncatus at 87.55% to 99.45%，indicating that the 12 pesticides were more effective against the T.truncatus than against the T. urticae at 3 days and 7 days post-dose．Taking the results of different time points together，all 12 pesticides can be used for the control of the T.truncatus，besides，the ivermectin，bifenazate，cyflumetofen，30% cyetpyrafen suspension concentrate and 45% bifenazate-ethoxyfenozide compounds suspension concentrate can be used applied by rotation for T.urticae．

Key words: Tetranychus urticae, Tetranychus truncatus, control efficacy, pesticide

摘要： 为测定不同药剂对二斑叶螨和截形叶螨的防治效果，选择12种不同类型药剂对两种叶螨进行田间防效试验。结果表明，药后3 d不同药剂对二斑叶螨的防效差异很大，0.5%依维菌素乳油、43%联苯肼酯悬浮剂、30%腈吡螨酯悬浮剂、20%丁氟螨酯悬浮剂的防效均超过90%，而1.8%阿维菌素乳油的防效最低，为58.17%；除依维菌素外，其他药剂对截形叶螨的防效均超过90%。药后7 d不同药剂对二斑叶螨的防效处于40.30%～97.70%，对截形叶螨的防效处于87.55%～99.45%，说明12 种药剂在药后3 d和7 d对截形叶螨的防效均高于对二斑叶螨的防效。综合不同时间点的防效结果，12种药剂均可用于防治截形叶螨，依维菌素、联苯肼酯、丁氟螨酯、30%乙唑螨腈悬浮剂及复配剂45%联苯肼酯·乙螨唑悬浮剂可轮换使用防治二斑叶螨。

关键词: 二斑叶螨, 截形叶螨, 田间防效, 药剂