四川是一个拥有一亿多人口的大省,人多耕地少。近年来,随着耕作制度的改革、栽培技术水平的提高,水稻、小麦、玉米纹枯病、小麦赤霉病、白粉病、油菜菌核病等发生面积逐年扩大;水稻品种抗性丧失,稻瘟病继1984、1985年之后再度大流行;稻飞虱大发生频率增加;棉花红蜘蛛、棉红铃虫、柑桔矢尖蚧、茶小绿叶蝉等经济作物病虫害也日益突出,如不加强防治每年至少损失粮食二、三十亿公斤,不仅影响农业稳定增长,也影响轻工原料的供应和外贸出口的需要。为了最大限度地减少病虫危害损失,我们把组建乡植保专业队作为完善农技服务体系的重要一环来抓,专群结合、科学防治,为农户搞好服务,取得了一定成效。到目前为止,全 Sichuan is a big province with more than 100 million inhabitants, with a small increase in cultivated land. In recent years, with the reform of cultivation system and the improvement of cultivation techniques, the occurrence of rice, wheat, corn sheath blight, wheat scab, powdery mildew, sclerotinia sclerotioris has been expanding year by year; the resistance of rice varieties is lost; The epidemic continued to pandemic after 1984 and 1985; the frequency of occurrence of planthoppers was also increased; and the economic crops such as red spider mite, cotton bollworm, citrus ganoderma and citrus green leafhopper also became increasingly prominent. At least two to three billion kilograms of grain are lost every year, which will not only affect the steady growth of agriculture but also affect the supply of raw materials for light industry and the needs of foreign trade exports. In order to minimize the damage caused by pests and diseases, we set up a team of specialists in plant protection as an important part of improving agricultural service system. We have achieved some results by combining special groups with scientific prevention and control and doing a good job for farmers. So far, all