稻飞虱是水稻生长中、后期主要害虫,能在短期内造成毁灭性的灾害,形成大片死秆倒禾,严重影响产量。 防治稻飞虱的途径很多,如喷雾、熏蒸、毒土等,其效果各有所长,应相互补充。虽熏蒸和毒土防治效果也较好,但有不足。其一,对高龄若虫杀伤效果差;其二,施药后绝大部分成若虫能爬到水稻的稻中、上部继续为害;再 Planthopper is a major pest in the middle and late stages of rice growth. It can cause devastating disasters in the short term, resulting in the formation of large-scale dead stalks, which seriously affect the yield. There are many ways to prevent and control planthoppers, such as spraying, fumigation, poison soil, etc. The effects of each have their own advantages and should complement each other. Although fumigation and toxic soil control effect is better, but there are deficiencies. First, the killing effect on the nymphs of the elderly is poor; Second, after spraying most of the adult nymphs can climb rice in rice, the upper continue to harm; then