几种生物药剂防治菜青虫的药效试验

菜青虫是黑龙江省柳河地区蔬菜最重要的害虫之一,近年来发生呈上升趋势,经常暴发成灾。文章用威克达乳油、农家乐乳油、菜地隆乳油及绿维特水剂等4种无公害药剂在田间对菜青虫幼虫进行了防治试验。结果表明,1%威克达乳油2 000倍液施药1 d后防治效果76.13%,施药后3 d防治效果80.91%,施药后7 d防治效果86.34%。经多重比较分析结果表明,在防治后1、3、7 d,1%威克达防治效果与其他3种药剂比较均有显著差异,具有防治效果好、成本低、无污染等特点,在生产中可以应用。

The control effect of Pieris rapae L. by several biological agents

An experiment of drug efficacy on Pieris rapae L.was carried out with emamectin benzoate,abamectin,diazinon and matrine.It showed that all the four pesticides showed good effects.Among them,the effect of 1% emamectin benzoate was the best.After the pesticides were applied for 1 d,its controll effect reached 76.13%.After the pesticides were applied for 3 d,its controll effect reached 80.91%.After the pesticides were applied for 7 d,its controll effect reached 86.34%,and was significantly higher than those of other three kinds of comparison fluids.