20％呋虫胺SG防治稻褐飞虱田间药效研究

目的]探索20％呋虫胺SG防治稻褐飞虱田间药效。方法]用20％呋虫胺SG和80％中农倍利SG，探讨20％呋虫胺sG防治稻褐飞虱田间药效。结果]田间防效比较试验显示，用20％呋虫胺SG 150、225、300、375g／hm。防治稻褐飞虱，其田间防效药后3d分别为53．02％、70．06％、71．73％、74．74％；药后7d分别为68．96％、78．44％、80．19％、84．19％；药后14d分别为75．84％、83．23％、88．32％、91．26％；药后21d分别为72．10％、87．55％、90．46％、91.24％。结论]20％呋虫胺SG是目前防治稻褐飞虱的理想药剂，可用20％呋虫胺SG300g/hm2对水675kg/hm^2均匀透彻喷雾。

Research on Field Efficacy of 20% Dinotefuran SG for Controlling Brown Rice Planthopper

Objective] The aim was to explore field efficacy of 20% dinotefuran SG for controlling brown rice planthopper. Method] The field efficacy of 20% dinotefuran SG for controlling brown rice planthopper was researched, by using 20% dinotefuran SG and 80% Zhongnong BARITS SG as materials. Result] The results of field efficiency comparison test showed that with 20% dinotefuran SG 150,225,300,375 g/hm2 preventing brown planthopper,the effectiveness in field three days after the treatment were 53.02%, 70.06%, 71.73%, 74.74%, respectively; the effectiveness in field seven days after treatment were 68.96%, 78.44%, 80.19%, 84.19%,respectively; the effectiveness in field fourteen days after treatment were 75.84%, 83.23%,88.32% ,91.26%, respectively; the effectiveness in field twenty-one days after treatment were 72.10% ,87.55%, 90.46% ,91.24%, respectively. Conclusion] 20% dinotefuran SG was a ideal pharmacy for preventing and controlling brown planthopper in currently. It could uniform and thorough spray with 20% dinotefuran SG 300 g/hm2 and add water 675 kg/hm2.