唑虫酰胺防治十字花科蔬菜小菜蛾田间药效试验

Field Efficacy Test of Tolfenpyrad on Plutella xylostella of Cruciferae Vegetables

为筛选防治小菜蛾的优良农药,以甲维盐乳油为对照,比较了不同用量唑虫酰胺悬浮剂对小菜蛾的防治效果。试验结果表明,30%唑虫酰胺悬浮剂在112.5、90.0、67.5 g/hm^2条件下防治小菜蛾具有良好的效果,药后3 d防效分别为93.69%、91.26%、87.04%,且具有较好的速效性,持效期为7 d左右,唑虫酰胺高效、低毒、安全,是防治小菜蛾的首选药剂。

In order to screen out good pesticide to prevention and control Plutella xylostella,emamectin benzoate emulsion was used as contrast and the control efficiency of different dosages of tolfenpyrad suspending agent on P.xylostella were compared.The results showed that 30%tolfenpyradat suspending agent in the doses of 112.5,90.0 and 67.5 g/hm2 had good control effect against P.xylostella,and the control effect were 93.69%,91.26%,87.04%in the third day aftertreatment.This pesticide had a rapidly available effect and the duration of pesticide effect was about 7 days.Tolfenpyrad was the preferred pesticide to control P.xylostella which had the advantages of high efficiency,low toxicity and safety.