近几年来北京郊区种植西瓜的面积不断增加。随之而来,西瓜病虫害的威胁也在逐年上升,其中苗期猝倒病、疫病、枯萎病、炭疽病和病毒病等及蚜虫、蝼蛄等害虫,是危害西瓜生产的主要病虫害,致使产量和品质降低,为此,1985～1986年与大兴县农科所合作,先后使用种衣剂1号、9号和10号,在200多亩田地上进行了病虫害防治试验与示范工作。 In recent years, the area of ​​watermelon planted on the outskirts of Beijing has been on the increase. Subsequently, the threat of watermelon diseases and pests also increased year by year, of which seedling damping-off disease, blight, blight, anthracnose and viral diseases and aphids, slugs and other pests, is harmful to watermelon production of major pests and diseases, resulting in yield and Therefore, from 1985 to 1986, we cooperated with Daxing Agricultural Science Institute and successively used seed coating agents No. 1, No. 9 and No. 10 to carry out pest control experiments and demonstrations on more than 200 mu of land.