不同药剂对稻田稻螟蛉的防治效果

2009年在第三代稻螟蛉严重发生的稻田内,进行了不同药剂的防治试验。结果表明,分别用20%甲维.毒死蜱WP1.5~1.8kg/hm²、30.2%甲维.毒死蜱EC1.05~1.35kg/hm²和20%甲维.毒死蜱EC1.5kg/hm²于药后第1~3天,20%虫酰.辛硫磷EC1.5kg/hm²和5%丁烯氟虫腈EC0.6kg/hm²于药后第3天的杀虫效果均达95%以上,40%二嗪.辛硫磷EC1.2kg/hm²于药后3~9天的杀虫效果稳定在80%以上。以上各药剂处理在药后第6天时,对初孵幼虫的控制效果均表现明显下降。

Effects of Different Insecticides On Controlling Naranga aenescens Moore in Rice Field

Field experiments of the control of Naranga aenescens Moore with different insecticides were carried out in rice fields where there was a serious outbreak of the third generation Naranga aenescens in 2009. The results showed that the effect of desinsection after 1 - 3 days of using Emamection benzoate + Chlorpyrifos 20% WP 100 ～120 g,30.2% EC 70 -90 g,20% EC 100 g or after 4 days of using Tebufenozide +Phoxim 20% 100 g,Butylene fipronil 5% EC 40 g per 667 m~2 ,reached above 95% . And after 3 -9 days of using 40% Diazinon· Phoxim EC 80 g per 667 m~2 the rate reached above 80% . The controlling effects of the above insecticides on the incubation season 's larva would show downtrend after 6 days of application.