3种药剂防治水稻稻飞虱药效试验

Efficacy trial of three pesticides on rice planthopper

2017年进行80%烯啶·吡蚜酮水分散粒剂、80%噻虫·吡蚜水分散粒剂、25%吡蚜酮水分散粒剂防治稻飞虱药效试验,结果表明:每667 m^2施用80%烯啶·吡蚜酮水分散粒剂8g、80%噻虫·吡蚜水分散粒剂7g的2个处理防治水稻稻飞虱持效性均较好且安全无药害,药后7d校正防效分别为88.4%、92.2%,药后14d校正防效分别为89.8%、91.3%;25%吡蚜酮水分散粒剂30g处理的防效略差。生产上可轮换使用80%烯啶·吡蚜酮水分散粒剂和80%噻虫·吡蚜水分散粒剂防治水稻稻飞虱。

Efficacy trial of80%Nitenpyram·Pymetrozine WG,80%Thiamethoxam·Pymetrozine WG,25%Pymetrozine WG on rice planthopper was conducted.The results showed that application of8g80%pymetrozine·nitenpyram WG and7g80%Thiamethoxam·Pymetrozine WG per667m2could effectively control rice planthopper with long persistence and was safe for rice growth,the adjusted control efficiency for which were88.4%and92.2%respectively after7days,and89.8%and91.3%after14days.The control efficacy of30g25%Pymetrozine WG was lower.Therefore,in rice production,it was suggested to alternately apply80%Nitenpyram·Pymetrozine WG and80%Thiamethoxam·Pymetrozine WG for rice planthopper control.