褐稻虱Nuaparvata lugens Stal为水稻重要害虫之一。我省每年在6月下旬开始见到的初次虫源,全为长翅型成虫,随后长翅型成虫即于当地稻田內产卵繁殖,一年可完成三个完整世代,各世代的成虫明显分化为长短两种翅型,若虫期因翅未发育,就没有成虫那样 Brown planthopper Nuaparvata lugens Stal is one of the important pests in rice. The primary source of insects in our province, beginning in late June each year, are all adult winged adults. After that, the long-winged adult adults spawn in the local paddy fields and can complete three complete generations a year, with the adults of all generations apparently Differentiation into two types of wing length, nymphs due to wing is not developed, there is no adult as that