几种三氯杀螨醇替代杀螨剂对苹果害螨的防治效果

目的]研究几种三氯杀螨醇替代杀螨剂对苹果害螨的防效.方法]研究了3种低毒、低残留杀螨剂对苹果树螨害的防效,并对其田间应用效果进行了评价.结果]5％唑螨酯、15％哒螨灵乳油和12.15％阿维·三唑锡防治苹果螨害平均防效分别为74.84％、71.22％、58.19％,施药后第7天防效最好,分别为99.46％、99.09％、98.83％,处理间差异不显著,3种杀螨剂对苹果螨害均有较好的防治效果.从速效性分析,15％哒螨灵乳油均优于5％唑螨酯、12.15％阿维·三唑锡,差异性达到极显著,防治后第1天分别为47.60％、45.10％、20.36％.3种杀螨剂施药后对果园害螨天敌均有一定影响,施药后第7天对天敌的消除率分别为31.9％、75.6％、91.8％.结论]5％唑螨酯悬浮剂对果园天敌影响较小,哒螨灵乳油次之,阿维·三唑锡复方药剂相对影响较大.

The Control Effect of Three Kinds of Dicofols Substituting for Acaricid on Apple Acarus

Objective] The aim was to study the control effect of three kinds of dicofols substituting for acaricide on apple acarus.Method]The control effect of three kinds of low-toxicity and low-persistent acaricide on apple trees acarus was studied,and the application effect was evaluated.Result] The result of the test indicated that the average control effects on apple trees acarus control of using fenpyroximate（5％）,pyridaben E.C（15％） and abamectin-azocyclotin （12.15％） were 74.84％,71.22％,8.19％ respectively.The best control effects were 99.46％,99.09％,98.83％ respectively after 7 days of using the pesticide,which showed little distinguish between test groups.All three kinds of acaricides had certain extent of effects on natural enemy of orchard acarus.The eliminate ratios were 31.9％,75.6％,91.8％ respectively after 7 days of using the pesticide.Conclusion] The fenpyroximate suspending agent（5％） had the least effect on natural enemy while the abamectin-azocyclotin polypharmaceutical（12.15％） had the most effect.