试验于 1999年 8月 19日进行，此时正值稻纵卷叶螟二、三龄幼虫高峰期，二化螟处于卵孵高峰期。每 667 m2的药液量为 75 kg。药后 7 d防治稻纵卷叶螟的效果及保叶效果，每 667 m2用锐劲特 5％悬浮剂 20 ml分别为 92.7％和 95.4％，用 40 ml分别为 98.4％和 97.3％，用 60 ml The experiment was conducted on August 19, 1999, when the larvae of the second and third instar larvae of the Cnaphalocrocis medinalis were present at the peak of egg hatching. The amount of liquid per 667 m2 is 75 kg. After 7 days of treatment, the effect of preventing and curing leaf roller and the effect of leaf protection were 92.7% and 95.4% respectively with 5 ml of 5% suspending agents per 667 m2, 98.4% and 97.3% with 40 ml respectively, 60 ml