褐稻飞虱是一种世界性水稻大害虫,已知亚洲的褐稻虱有5个生物型,即生物型Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅴ(吴荣宗1981),我国广东省田间有生物型Ⅰ和生物型Ⅱ(黎国涛等1981),浙江省温州等地的褐稻虱有由生物型Ⅰ向生物型Ⅱ转变的趋势,自然种群中已混有生物型Ⅰ、Ⅱ甚至生物型Ⅲ的个体(巫国瑞等1983)。我省褐稻虱究属何生物型?迄今尚未查清。搞清我省褐稻虱生物型, Brown planthopper is a worldwide pest of rice. It is known that there are 5 biotypes of brown planthopper in Asia, namely biotypes I, II, III, IV and V (Wu Rongzong, 1981) Ⅰ and Ⅱ (Li Guotao et al., 1981), and brown planthopper in Wenzhou, Zhejiang have a tendency to change from biotype Ⅰ to biotype Ⅱ. Individuals of biotype Ⅰ, Ⅱ and even biotype Ⅲ have been mixed in natural populations (Wu Guorui et al 1983). What type of brown planthopper in our province? Has not yet been identified. Find out the brown planthopper biological type in our province,