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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%。
Pu Lian Ling buprofezin 10 consecutive years of large-scale use, the dosage increased year by year and the effect decreased, choose to replace pesticide varieties is imperative. The test results of different dosage of 10% imidacloprid against planthopper showed that 10 ~ 20 g of 10% imidacloprid wettable powder per 6 6m 2 was applied once at the peak of nymphs of white-backed planthopper nymphs, Rice planthopper hazards during the whole growth period, 50 days after drug control effect of more than 85%, cell output than non-drug area increased 14.8% to 19.3%.