三化螟的发生与防治效果调查王述明徐锦贤汤铎（江苏省通州市兴仁农技站２２６３７１）（通州兴仁成人中心校三化螟在我市发生历史很久，五、六十年代发生面广量大，曾是水稻生产上的主要害虫。但至七十年代中后期，由于耕作制度的改革，三化螟的种群数量逐年下降。八十年... Investigation on Occurrence and Control Effect of Borer (Chilo suppressalis Walker) WANG Shu-Ming, XU Jin-Xian, TUO Duo (Xingren Agricultural Station, Tongzhou, Jiangsu Province 226371) (Tongliao Xingrong Adult Center School has a long history in our city and a wide range in the 1950s and 1960s Large, once a major pest in rice production, but by the mid-to-late 1970s, the population of the Borer died from a decline year by year due to the reform of the farming system.