为害水稻的稻飞虱(白背飞虱、褐飞虱),以前是间隙性发生的害虫,近十多年来,在我县常猖獗成灾,发生和为害程度日益加剧,已上升成为水稻高产、稳产的重要障碍。尤其是在一些施肥水平高、单产较高的地区,更为突出。为害损失,部分地区超过了螟虫。因此,了解稻飞虱大发生的原因, Rice planthoppers (whitebacked planthopper, brown planthopper) that infest rice are formerly pests with intermittent occurrence. In the past decade or so, they often became rampant in the county and their occurrence and damage became more and more aggravating. They have risen to become high-yielding rice, An important obstacle to stable production. Especially in some high level of fertilization, high yield areas, even more prominent. Damages, in some areas more than borers. Therefore, to understand the reasons for the occurrence of planthopper,