关键词: 二斑叶螨, 截形叶螨, 田间防效, 药剂

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