利用80%敌敌畏乳油防治柳蓝叶甲试验

Experiments against Plagiodera versicolora by Using 80% Dichlorvos EC

在7月上旬,将80%敌敌畏稀释成4种浓度,对野外馒头柳上的柳蓝叶甲进行田间对比试验,结果表明:不同浓度配比其虫口减退率有显著差异,随着浓度增加,防治效果也逐渐提高;从保护天敌和避免害虫产生抗药性等综合因素考虑,采用1∶500倍的80%敌敌畏防治柳蓝叶甲较适宜。

In early July,80% dichlorvos was diluted to four concentrations,Plagioderaversicolora in the field were conducted comparison experiments.Result shows that:decrease rate of Plagioderaversicolora under different con-centration ratios have significant differences.The control effect gradually increases with the increase of the concen-tration.From the viewpoint of protecting natural enemies and avoid pest resistance,adopting 80% dichlorvos (1:500 times)to prevent Plagioderaversicolora is more appropriate.