泗溪公社良田大队是我县的一个高产单位。一九七五年粮食亩产1,200多斤。但是,近年来出现了一些威胁高产的病虫,如纹枯病、稻瘟病、稻飞虱、螟虫、稻纵卷叶虫等。尽管用药水平逐年提高,历年因病虫损失仍达5—10%。过去用药少,打一 Sixth commune fertile brigade is a high-yielding unit in our county. The grain output in 1995 was over 1,200 kilos. However, in recent years, some pests that threaten high yield have emerged, such as sheath blight, rice blast, planthopper, stem borer, rice leafroller and the like. Although the level of drug use has been increasing year by year, the loss due to pests and diseases still reaches 5-10% over the years. In the past, less medication, hit one