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白背飞虱(Sogatella furcifera Horvath)和褐飞虱(Nilaparvata lugens stal)是我国水稻上为害较严重的害虫。八十年代以来,随着耕作制度的改革,水稻品种的更替,杂交稻和迟熟品种的推广,施肥水平提高及气候因素,两种飞虱的种群水平不断提高,大发生频率明显增加,给水稻生产带来严重威助。研究证实,白背飞虱、褐飞虱具有远距离迁飞习性,并已明确我国的初始虫源主要来自国外地区。但在各稻区两种稻飞虱在早、(中)晚稻上主害代的虫源性质有所不
Sogatella furcifera Horvath and Nilaparvata lugens stal are the most harmful pests on rice in China. Since the 1980s, with the reform of the farming system, the replacement of rice varieties, the promotion of hybrid rice and late maturity varieties, the improvement of fertilization levels and climatic factors, the populations of two planthopper species increased continuously, the frequency of occurrence of large-scale planthoppers increased significantly, Rice production has brought serious help. Studies have confirmed that the whitebacked planthopper, brown planthopper has long-range migration habits, and has clearly the main source of insects in our country mainly from abroad. However, in the rice fields, two kinds of planthopper occurred in early, middle and late rice,