50%吡蚜酮水分散粒剂防治稻飞虱药效试验

Efficacy trial of 50% pymetrozine water dispersible granule on rice planthopper

进行50%吡蚜酮水分散粒剂防治稻飞虱的药效试验,结果表明:50%吡蚜酮水分散粒剂对稻飞虱具有良好的防治效果,且持效期较长。每667 m2使用50%吡蚜酮水分散粒剂12 g、16 g处理,药后3 d的防效达80.21%和83.58%,药后7 d、14 d的防效为90.20%和96.30%。经试验观察,对水稻生产安全,可在生产中推广应用,建议每667 m2使用量为12 g。

Efficacy trials of 50% pymetrozine water dispersible granule on rice planthopper were conducted. The results showed that 50% pymetrozine water dispersible granule showed great control efficiency on rice planthopper and maintaining long-term effect. The controlling efficiencies in the treatments applied 12 g and 16 g 50% pymetrozine water dispersible gran- ule per 667 m2 were 80.21% and 83.58% respectively after treatment for 3 days, and the average efficieneies were 90.20% and 96.30% respectively after treatment for 7 and 14 days. We found that pymetrozine water dispersible granule was safe to use and could be popularized in rice production, the reasonable dose was 12 g per 667 m2.