Effect Trials on Abamectin + Chlorpyrifos 8% GR for Controlling Turf Grubs

To screen high-efficiency, low-toxicity, and safe pesticides for controlling soil pests, experimental investigations of Abamectin ＋ Chlorpyrifos 8 % GR for controlling tuff grubs were implemented according to Field Pharrnacodynamic Test Standards of the Ministry of Agricuhure. The results showed that as the active in- gredient of Abamectin ＋ Chlorpyrifos 8% GR is 1 625 - 1 950 g/hm2, the control efficiency of tuff grubs is 81.43% -90.46% 3 - 10 days after pesticide applica- tion, the readily availability and persistent effect achieve the ideal level, and it is safe for turf.

45．5％阿维菌素·丁醚脲悬浮剂防治小菜蛾田间药效试验

应用45.5%阿维菌素.丁醚脲悬浮剂防治小菜蛾幼虫,结果显示,以450、600mL/hm245.5%阿维菌素.丁醚脲悬浮剂处理7d后对小菜蛾的防治效果分别为87.73%和94.84%,与对照药剂1.8%阿维菌素乳油450mL/hm2和25%丁醚脲乳油1200mL/hm2处理的防效相当;药后甘蓝叶片虽略有斑驳皱缩,但后期恢复正常,不影响结球,表明45.5%阿维菌素.丁醚脲悬浮剂是防治小菜蛾的有效药剂之一,可以与其他药剂轮换使用,推荐使用浓度为450mL/hm2。