5种杀虫剂和黄瓜新小绥螨对棉田朱砂叶螨的协调防治

Integrated control of carmine spider mite by five kinds of pesticides combined with Neoseiulus cucumeris

为协调使用杀虫剂及害虫天敌,本文测定了阿维菌素、印楝素、苦参碱、除虫菊素和吡虫啉5种常用杀虫剂分别与天敌黄瓜新小绥螨(原名胡瓜钝绥螨)对棉田朱砂叶螨的联合防治效果。结果表明:1.8%阿维菌素EW(1∶8 000)处理6d后释放黄瓜新小绥螨对朱砂叶螨的防治效果最佳,20d后相对防治效果高达96.63%;其次是0.3%印楝素EC(1∶250)处理7d后释放黄瓜新小绥螨,1d和20d后防效分别为59.7%和90.16%;0.5%苦参碱AS(1∶2 000)处理6d后释放黄瓜新小绥螨,20d后相对防治效果达到82.65%。本研究为朱砂叶螨可持续防控提供了可选方案,为延缓抗药性产生提供了研究思路。

To find the method for the integrated control of carmine spider mite,Tetranychus cinnabarinus and delay its resistance to pesticides,the joint actions of each of five commonly pesticides（abamectin,azadirachtin,matrine,pyrethrins and imidacloprid）,and Neoseiulus cucumeris（Oudemans）,the natural enemy of cotton red spider mite were studied.N.cucumeris was released after application of pesticides for seven days（for 0.3% azadirachtin EC）or six days（for other pesticides）.The results showed that the combined action of 1.8% abamectin EW（1∶8 000）and N.cucumeris had the best control efficacy of 96.63% at 20 days after N.cucumeris releasing.The control efficacies of N.cucumeris and0.3% azadirachtin EC（1∶250）were 59.7% and90.16% after one day and 20 days,respectively,after N.cucumeris releasing.The control efficacy of N.cucumeris and 0.5% matrine AS（1∶2 000）was 82.65% at 20 days after N.cucumeris releasing.The results provide options for sustainable control of T.cinnabarinus and for the delay of pesticides resistance.