18%毒·氟CS对玉米地下害虫防治效果研究

Study on the Control Effect of 18% Chlorpyrifos·fipronil CS Against Underground Corn Pests

为明确18%毒·氟防治地下害虫的最佳使用剂量,研究了18%毒·氟CS对玉米地下害虫的防治效果。结果表明:除了18%毒·氟CS药种比1∶50处理抑制玉米生长外,其它药剂处理对玉米生长没有影响。18%毒·氟CS药种比1∶100处理玉米被害率最低,对玉米地下害虫防治效果最好,为94.34%,极显著高于其它处理,其产量最高,比空白对照增产15.19%,比对照药剂60%吡虫啉PS处理增产6.05%。因此,18%毒·氟CS防治玉米地下害虫最佳使用量为药种比1∶100。

In order to determine the optimal dosage of 18% Chlorpyrifos·fipronil CS to control underground pests,the control effect of 18% Chlorpyrifos·fipronil CS was studied.The results showed that except the treatment with 1∶50proportion of seed and coating agent,other treatments had no effect on corn growth.When the proportion of seed and coating agent was 1∶100,the control effect was 94.34% which was the best,and it was significantly higher than other treatments.Its yield was also the highest,increased 15.19% than CK and6.05%than 60%imidacloprid.Therefore,the optimal proportion of seed and coating agent was 1∶100for 18%Chlorpyrifos·fipronil CS.