4种药剂对甘蓝几种主要鳞翅目害虫的田间控制效果

测定了4种药剂对甘蓝上小菜蛾、斜纹夜蛾、甜菜夜蛾和菜青虫等主要鳞翅目害虫的防效,并对其田间控制效果进行了评价。结果表明:5%氯虫苯甲酰胺SC 600 g/hm2对4种害虫的整体控制效果最好,药后3 d防效均在91%以上,且对小菜蛾防效显著高于其他3种药剂。20%氟苯虫酰胺WG 150 g/hm2的整体防效次之,除对小菜蛾的防效显著低于5%氯虫苯甲酰胺SC外,对其他3种害虫的防效则与氯虫苯甲酰胺相当。150 g/L茚虫威SC 250 g/hm2对菜青虫的速效性最好,药后1 d的防效即达88.36%,显著高于其他药剂处理,对其他3种害虫也有较好的防治效果。2%甲氨基阿维菌素苯甲酸盐EC 375 g/hm2对斜纹夜蛾和小菜蛾的防治效果比较差,药后7 d最高防效分别为75.92%和66.63%,均显著低于其他药剂。

Control Effects of Four Pesticides Against Several Main Lepidopterous Pests on Cabbage

The control effects of four pesticides against several main lepidopterous pests （Plutella xylostella, Prodenia litura, Spodoptera exigua, Pieris rapae） on cabbage were studied in this paper. The results showed that chlorantraniliprole 5%SC 600 g/hm2 was the most effective pesticide for controlling four tested pests with the control effects over 91%on the 3rd day after spraying. The control effects of flubendiamide 20%WG 150 g/hm2 against four pests was the second, and the efficacy to Plutella xylostella was significantly lower than chlorantraniliprole 5%SC 600 g/hm2. The rapidly available effect of indoxacarb 150 g/L SC 250 g/hm2 against Pieris rapae was the best with the efficacy of 88.36%on the 1st day after spraying, and the control effects to other pests were more than 82%on the 7th day after spraying. The control effects of emamectin benzoate 2%EC 375 g/hm2 against Plutella xylostella and Prodenia litura were poor.