褐稻虱(Nilaparvata Lugens Stal)是亚洲热带和温带水稻地区的重要害虫.近十年来,暴发频率增加,为害区域扩大,成为水稻生产的一大威胁,引起了有关地区的广泛重视.现将国外这方面的研究动态综述如下.一、分布及为害褐稻虱的分布为害范围,南起澳大利亚及南太平洋岛屿,北至朝鲜,东起日本,西至巴基斯坦.据日本资料记载,自697年首次暴发至第二次世界大战,大小范围暴发约有一百余次,曾造成严重饥荒,促使日本政府在1941年成立植保系统.近十年来,日本由于提高水稻复种指数,推广矮杆品种,增加氮肥施用量以及推行密植等因素,导致暴发频 Nilaparvata Lugens Stal is an important pest in the tropical and temperate rice regions of Asia.In the past ten years, the frequency of outbreaks increased, the damage area expanded and became a major threat to rice production, which aroused widespread attention in the regions concerned. The research dynamics in this area are summarized as follows: I. Distribution and Damage The distribution range of brown planthopper is from Australia and the South Pacific islands in the south, to North Korea in the south, Japan and west to Pakistan in the east. According to Japanese data, for the first time since 697 Outbreak to World War II, the size of the outbreak about a hundred times, had caused a serious famine, prompting the Japanese government to establish a plant protection system in 1941. In the past decade, Japan as a result of increased rice crop index, the promotion of dwarf varieties, increased The amount of nitrogen fertilizer and the implementation of close planting and other factors, resulting in outbreak frequency