高毒农药替代品种防治稻飞虱效果研究

Study on Controlling Rice Planthoppers with Several Substituted Pesticides Instead of Highly Toxic Ones

使用噻嗪酮+毒死蜱(3∶1)、吡虫啉+噻嗪酮(1∶5)、吡虫啉+毒死蜱(1∶5)进行防治稻飞虱田间药效试验,结果显示,各试验药剂对稻飞虱均有较好的防治效果,吡虫啉+毒死蜱(1∶5)和吡虫啉+噻嗪酮(1∶5)速效性较好,药后1天防效在80%左右,高于单剂噻嗪酮和毒死蜱,与单剂吡虫啉的防效相近;持效期以吡虫啉+噻嗪酮(1∶5)最好,药后14天3个不同剂量处理防效为89.13%～95.46%,其次为吡虫啉+毒死蜱(1∶5)和噻嗪酮+毒死蜱(3∶1),持效期均大于单剂毒死蜱。

Field trials on controlling rice planthoppers with Buprofezin and Chlorpyrifos （3：1）, Imidacloprid and Buprofezin （1：5） ,Imidaeloprid and Chlorpyrifos （1：5） illustrated an effective control efficacy. One day after applying Imidaeloprid and Buprofezin （1：5） as well as Imidaeloprid and Chlorpyrifos （1：5）, the control efficacy was approximately 80% , which was higher than applying Buprofezin or Chlorpyrifos and similar to applying Imidaeloprid, that showed the two mixtures have quick bioaetivity.14 days after applying different doses, Imidaeloprid and Buprofezin （1：5） had the longest persistent efficacy period, then Imidaeloprid and Chlorpyrifos （1：5）, Buprofezin and Chlorpyrifos （3：1）,all 3 mixtures was longer than Chlorpyrifos, with 89.13%-95.46% of control efficacy.