6种杀虫剂对小菜蛾的室内毒力测定及田间药效研究

室内毒力测定结果表明,处理24h后,秀田蛾克的室内毒力最强,LC50为0.64μg/mL,美满次之,LC50为1.86μg/mL。田间药效结果表明,秀田蛾克和美满防治小菜蛾的效果明显优于其他杀虫剂,两者的防效在药后3d达到81%以上,在药后6d达到90%以上。因此,可以作为推广药剂在生产上推广使用。

Study on the Toxicity Determination and Field Efficacy Trials of Six Pesticides against Plutella xylostella L.

The toxicity determination in laboratory showed that Xiutian’eke was the most toxic after 24 hours with the LC50 of 0.64 μg/mL, and methoxyfenozide ranked second with the LC50 of 1.86 μg/mL. The results of field trials indicated that the efficacies of Xiutian’eke and methoxyfenozide were much better than those of others. Their control efficacies would be over 81% 3 days after treatment and over 90% 6 days after treatment. So they can be used into the agricultural production as extended insecticides.