【摘要】 扑虱灵 buprofezin连续 10年的大面积使用 ,用药量逐年增加而效果下降 ,选择替换农药品种已势在必行。 10 %吡虫啉不同用药量防治稻飞虱试验结果表明 ,每 6 6 7m2 用 10 %吡虫啉可湿性粉剂 10～ 2 0 g在白背飞虱主害代低龄若虫高峰期施药 1次 ,即可控制水稻全生育期稻飞虱的危害 ,药后 50天校正防效达 85%以上 ,小区产量比不用药区增加 14 .8%～ 19.3%。更多还原

【Abstract】 Due to the wide use of buprofezin for ten years, the use amount of the insecticide increased by years, but the control effect went down, and it is imperative to choose new pesticides to replace the old one .Different quantities of the insecticide,10% imidacloprid, was used for the control of rice planthoppers in the field trials. The control effect lasted for 50 days and was over 85% after imidacloprid wettable powder was sprayed for one time at the dose of 10-20g/667m 2 at the peak of nymph population of the major generation.The chemical treatment led to 14.8%-19.3% increase of grain yield compared to that in untreated plots.更多还原