噻虫啉对蚜虫杀虫活性及田间药效评价

Activity and Field Experiments of Thiacloprid against Aphids

采用农药生物测定标准操作程序(SOP)比较测定了噻虫啉和吡虫啉对蚜虫的毒力。室内生物测定结果表明,噻虫啉和吡虫啉对蚜虫有良好的杀虫活性,其毒力平均LC50分别为1.24mg/L和1.45mg/L。田间小区试验结果表明,噻虫啉对蚜虫表现出良好的防治效果,有效用量为3.36、6.72、10.08g/667m2时,药后1～10d的防治效果分别为85.82%～89.55%、89.25%～92.08%、92.43%～96.34%,好于剂量相当的吡虫啉的防治效果。

The toxicity and control effects of thiacloprid and imidacloprid were evaluated against Myzus persicae using standard insecticide bioassay techniques. Results of bioassay showed that both thiacloprid and imidacloprid had excellent insecticidal activity against Myzus persicae. The field contrast experiments results showed that the relative control effects ofthiacloprid SC at 3.36 to 10.08 g per 667m^2 were over 85% in the 1st, 3rd, 7th, 15th day after application.