稻苞虫的取食规律是,白天藏在苞内,不食不动,夜间爬到苞外活动,暴食叶片。活动高峰有两个:一个是下午6点至次日1点;另一个是早晨3—5点之间。根据这个规律把喷药时间由白天改为晚上,经大面积使用喷药效果显著。同样药品、相同药量,上午喷药除治稻苞虫死亡率只有30—34%,晚上喷药除治12小时后检查,死亡率达87.8%,24小时后死亡率 Rice insects feeding law is hidden in the bud during the day, eat fast, crawling to the outside activities at night, binge eating leaves. There are two peak activities: one is from 6 pm to 1 am the next day; the other is between 3-5 am. According to this rule to change the spraying time from daytime to night, the effect of large-scale use of spraying. The same drugs, the same dose, the morning spraying except for the treatment of rice insects death rate of only 30-34%, spraying at 12 hours after treatment in addition to inspection, the mortality rate of 87.8%, 24 hours after the death rate