稻纵卷叶螟CnaphalocrocismedinalisGuenbe与白背飞虱Sogatellafurcifera（Horvath）是我县水稻生育中期的主要害虫。80年代以来，暴发频繁，是稻田害虫类的重点防治对象。过去，基本上是根据当年的防治适期，分别用药剂防治，但由于稻田用药次数增多，不仅增加了防治成本，还 Cnaphalocrocis medinalis Guenbe and Sogatellafurcifera (Horvath) are the major pests of mid-term rice growth in our county. Since the 1980s, the outbreaks have been frequent and are the key prevention and control targets for paddy pests. In the past, basically according to the current control of the appropriate period, respectively, with agents to prevent and control, but because of the increased number of drugs in paddy fields, not only increased the cost of prevention, but also