不同药剂对草地贪夜蛾的防治效果

Control Effect of Different Pesticides on Spodoptera frugiperda

选用6种不同药剂,采用茎叶喷雾法防治玉米田草地贪夜蛾幼虫。结果表明,用900 mL/hm^2 10%甲维·虫螨腈SC+900 mL/hm^2 5%虱螨脲EW对玉米田草地贪夜蛾防治效果最好,药后1 d杀虫效果达74.38%,药后3、7、15 d杀虫效果均为100%;药后1、3、7、15 d保苗防效分别为51.22%、68.42%、90.48%、95.65%。生产上,推荐使用600 mL/hm^210%甲维·虫螨腈SC+600 mL/hm^2 5%虱螨脲EW、300 mL/hm^2 30%氟铃·茚虫威SC+450 mL/hm^2天然植物增效剂、1 500 mL/hm^220亿P2B/mL甘蓝夜蛾核型多角体病毒SC防治玉米田草地贪夜蛾。

Six different pesticides were used to control larva of Spodoptera frugiperda in maize field.The results showed that the best control effect was obtained by using 900 mL/hm^2 10%carnitrile SC+900 mL/hm^2 5%carnitene urea EW,and the insecticidal effect reached 74.38%on 1 d after spraying pesticides and 100%on 3,7,15 d after spraying pesticides.The effects of 1,3,7 and 15 d after treatment were 51.22%,68.42%,90.48%and 95.65%,respectively.In terms of production,it was recommended to use 600 mL/hm^2 10%crestellonitril SC+600 mL/hm^2 5%louse urea EW,300 mL/hm 230%fluorlil·indene SC+450 mL/hm^2 natural plant synergetic agent,and 1 500 mL/hm^2 billion P2B/mL cabbage armyworm nuclear polyhedron virus SC for the control of Spodoptera frugiperda in corn field.