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稻飞虱是水稻生产中的主要害虫之一。近几年来，稻飞虱在大连地区的危害有明显加重的趋势。因此，研究稻飞虱的发生发展规律并提出相应的防治措施，是目前大连地区水稻生产中亟待解决的问题。稻飞虱属热带昆虫，具有迁飞特性。在我国北方每年所发生稻飞虱的虫源都是由南方逐次
Planthopper is one of the major pests in rice production. In recent years, the harm of planthopper in Dalian has obviously increased. Therefore, to study the occurrence and development of planthoppers and put forward corresponding prevention and control measures are the problems to be solved urgently in the rice production in Dalian. Rice planthopper is a tropical insect with migration characteristics. Pests of planthoppers occur in the north of our country each year successively from the south