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本文介绍了当前棉田中最大的害虫—棉铃虫的为害情况及田间用生物农药防治棉铃虫的方法及经验。试验结果表明:200×Bt 乳剂、200דBt 乳剂+Bt 增效剂Ⅱ号”、600×Bt 粉剂、600דBt 乳剂+Bt 增效剂Ⅰ号”四种生物防治处理均能取得良好的防治效果及保蕾效果。新复极差分析显示,200דBt 乳剂+增效剂Ⅱ号”与1000×2.5%功夫菊酯防效相近,完全可以替代功夫菊酯防治棉铃虫。
This article describes the current cotton fields, the largest pest - cotton bollworm damage and field with biological pesticides to control cotton bollworm methods and experience. The results showed that there are four kinds of biological control measures of 200 × Bt emulsion, 200 × Bt emulsion + Bt synergist Ⅱ, 600 × Bt powder, 600 × Bt emulsion and Bt synergist Ⅰ Can get good control effect and protect the bud effect. The new repolarization analysis showed that the 200 × “Bt emulsion + synergist Ⅱ” and 1000 × 2.5% Cypermethrin similar control effect, can replace the control of cotton bollworm.