七种农药对茴香薄翅野螟防效研究

摘要

Evergestis extimalis Scopoli was controlled in the field by spraying.The results showed that the control efficacy of 0.5%emamectin-benzoate microemulsifier,4.5% beta-cypermethrin emulsifiable concentrate,2.5% cyhalothrin emulsifiable concentrate and 200 g/L chlorantraniliprole suspension concentrate increased with increase of the spray times.On the contrary,the control efficacy of 40% methomyl soluble powder and 25% dimehypo aqueous solutions decreased.The range of control efficacy of 48% chlorpyrifos emulsifiable concentrate was narrow with different spray times,approximately 95.85%.The control efficacy of 48% chlorpyrilos emulsifiable concentrate and 40% methomyl soluble powder was best in seven insecticides by spraying one time.They were 96.03% and 94.82%,respectively.The control efficacies of 4.5% beta-cypermethrin emulsifiable concentrate,2.5%cyhalothrin emulsifiable concentrate and 48% chlorpyrifos emulsifiable concentrate were approximately 95.70%by spraying one time or two times.%用喷雾法防治油菜田茴香薄翅野螟,结果表明:0.5%甲氨基阿维菌素苯甲酸盐微乳剂、4.5%高效氯氰菊酯乳油、2.5%高效氯氟氰菊酯乳油和200 g/L氯虫苯甲酰胺悬浮剂4种农药对茴香薄翅野螟的防效随着施药次数增加而增加;40%灭多威可溶性粉剂和25%杀虫双水剂的防效随着施药次数的增加防效逐渐下降;48%毒死蜱乳油在不同施药次数下防效变化幅度较小,平均防效在95.85%左右;上述7种农药喷施1次后,以48%毒死蜱乳油和40%灭多威可溶性粉剂的防效最好,分别达96.03%和94.82%.4.5%高效氯氰菊酯乳油、2.5%高效氯氟氰菊酯乳油和48%毒死蜱乳油喷施2次和3次时的防效都在95.70%左右.