我市东阳镇属平川地区,交通方便,水肥条件较好,历年以种瓜菜和小麦为主,而对果树的管理则比较粗放,因而导致全镇945亩18000株20年生以上的苹果树均不同程度地发生了腐烂病。为了采取积极有效措施,尽快控制现有病斑的扩展和蔓延,1987年试用 S—921新农药抗生素进行了防治试验。S—921是榆次市科委从河北省科学院生物研究所购回的,在6、7、8三个月病菌传 Dongyang town belongs to Hirakawa area, with convenient transportation and better water and fertilizer conditions. In the past years, vegetables and wheat are the main types of vegetables and the management of fruit trees is rather extensive. As a result, 18,000 trees of over 20 years old in 945 mu Rotten disease occurred to varying degrees. In order to take active and effective measures to control the spread and spread of the existing lesion as soon as possible, in 1987 trial S-921 new pesticide antibiotics were tested. S-921 is Yuci Science and Technology Commission purchased from the Institute of Biology, Hebei Academy of Sciences, in 6,7,8 three months germ-based