五种杀虫剂对甜菜夜蛾的田间防效评价

Control Effect of Five Insecticides on Spodoptera exigua Hubner

甜菜夜蛾是危害蔬菜的重要害虫。用10%溴虫腈SC 750mL/hm2、3%甲氨基阿维菌素苯甲酸盐WG 125g/hm2、20%氯虫苯甲酰胺SC 150mL/hm2、48%毒死蜱EC 900mL/hm2、18g/L阿维菌素450 mL/hm2防治甜菜夜蛾,结果表明,10%溴虫腈SC速效性和持效性均最好,药后1d和7d的防效分别高达96.76%和97.93%;18g/L阿维菌素EC速效性较差,持效性较好,药后1d、7d防效分别为27.18%和87.02%。其余3种药剂均具有较好的速效性和持效性,药后1d防效均在60%以上,药后7d防效均在85%以上。

Field control efficiency of 5 kinds of insecticides on larvae of Spodoptera exigua Hubner was evaluated.The results showed that chlorfenapyr 10% SC had best rapid and durable effect among 5 kinds of insecticides,with 96.76% and 97.93% control efficacies on the first and 7th days after treatment,respectively.While avermectin 18 g/L EC had bad rapid available and general durable effect,with 27.18% and 87.02%.Chlorpyrifos 48% EC,emamectin-benzoate 3%WG and chlorantraniliprole 20% SC also had good rapid and durable effect,the control efficacies of these insecticides on the first and 7th days after treatment were above 60% and 85%,respectively.