毒死蜱·高氯混剂对不同蔬菜甜菜夜蛾的控制作用研究

Study on the United Control Effects of Chlorpyrifos+cypermethrin to Spdoptera exigua (Hübnet)on Different Vegetable Species

田间小区试验结果表明,20%毒死蜱·高氯乳油对豇豆和白菜地的甜菜夜蛾均有较好的防治效果。在豇豆地甜菜夜蛾卵孵化期施药,1000￣600倍液,药后3d的防效最高,达74.06%￣91.84%,药后7d的防效已下降;在白菜地甜菜夜蛾低龄高峰期施药,药后3d的防效最高,为67.58%￣92.97%。该产品对斜纹夜蛾和菜青虫均有较好的兼治作用,同时对豇豆和白菜安全,可以作为防治甜菜夜蛾的有效药剂推广使用,推荐使用浓度为600￣800倍。

The results of field plot trial indicated： 20% Chlorpyrifos ＋cypermethrin EC provided a satisfaction control effect against Spdoptera exigua （Hübnet） in different vegetable fields. In cowpea field, the control effect were 74.06%-91.84% in the third day with the dilution times of 1000-600 spraying in the period of egg hatching days, and it dropped in the seventh day. In Chinese cabbage field, it also gave the best control effect in the third day, which reached 67.58%-92.97%. This product provided a satisfaction control effect against Spodoptera litura（Fabricius）and Pieris rapae, and security to tested vegetable species. It can be used to control Spdoptera exigua （Hübnet） in the field with the dilution times of 600-800.