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秀山一季中稻区，白背飞虱、褐飞虱的主害峰期分别在6月底至7月中旬、8月上中旬，长达40天左右。试验长效农药扑虱灵的不同用药量对稻飞虱主害时期的控制和保产作用。结果表明，在白背飞虱虫量达到防治指标（1500头／百丛）或主害代低龄若虫高峰期施用25％扑虱灵可湿性粉剂750g／hm2，药效可维持40天左右，小区产量比不用药区增产37％左右。
Xiushan a quarter of rice, whitebacked planthopper, brown planthopper main peak were at the end of June to mid July, mid-August, up to 40 days. Experiment on the Control of Long - acting Pesticide Propidium Sulfate in Controlling and Preservation of Planthopper during the Main Period of Planthopper. The results showed that the efficacy of 25% bupropion WP at a dosage of 750 g / hm2 could be maintained for about 40 days when the insect population of whitebacked planthopper reached its control index (1500 heads / 100 plexuses) Output of about 37% increase than the drug-free area.