几种药剂对新疆南疆地区棉花棉铃虫的防效

目的]自20世纪90年代中期以来棉铃虫在新疆南疆棉区严重发生,给新疆棉花生产造成了一定的损失.生产上滥用农药现象严重,造成防治效果不稳定,棉铃虫抗药性增强.为了有效控制棉铃虫为害,降低棉铃虫产生抗药性的速度.方法]试验选择几种类型、作用方式不同的化学药剂,于2007、2008年在新疆莎车县进行了防治棉铃虫的田间药效试验.试验采用随机区组排列,在棉田二代棉铃虫卵高峰期至低龄幼虫期采用棉田自然虫口基数的基础上接虫进行田间试验.结果]45;丙溴磷·高效氯氰菊酯EC 540～675 g a.i./hm2、40;丙溴磷EC 540～600 g a.i./hm2、5;氟铃脲EC 75 g a.i./hm2、40;毒死蜱EC 720 g a.i./hm2和1.8;阿维菌素EC 18.9 g a.i./hm2等药剂在试验浓度下对棉花安全,优于35;硫丹EC和2.5;高效氯氟氰菊酯EW 2对照药剂的防效或与其效果相当.结论]防治棉铃虫,可采用以上几种化学农药及用量在当地替代常用药剂或与其交替使用进行防治.

Control Effect of Different Pesticides Against Helicoverpa armigera In Cotton in Southern Xinjiang

【Objective】The research of testing the efficacy and dosage of different pesticides for controlling Helicoverpa armigera was conducted in Shache,Xinjiang in 2007 and 2008.【Method】The experimentation was performed when the eggs production peak and immature larvae of 2nd Generation Helicoverpa armigera occurred.【Result】The efficacy of 45% profenofos·beta-cypermethrin EC 675 g a.i./hm2,40% profenofos E C600 g a.i./hm2,5% hexaflumuron EC75g a.i./hm2,40% chlorpyrifos EC 720 g a.i./hm2 and 1.8% abamectin EC 18.9 g a.i./hm2 were better than or same as the efficacy of 35% endosulfan EC and 2.5% lambad-cyhalothrin EW under the testing density and they are safe for cotton.【Conclusion】For control of Helicoverpa armigera,45% profenofos·beta-cypermethrin EC,40% profenofos EC,5% hexaflumuron EC,40% chlorpyrifos EC and 1.8% abamectin EC can be applied alternately with regular pesticides or even replace the local regular pesticidcs for better control effect.