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1.确保纯真无病毒苗木的繁育，要求技术性很强，一定要生产无病毒苗木的场家和单位引种购苗，以免苗木不纯真而失败。 2.不能重茬无病毒苗木，不能栽在重茬的苹果园中。前茬的老果树刨除后，必须将果园彻底深翻，清除残根，并种植绿肥或其他农作物4～5年，才能考虑再植。3.无病
1. To ensure pure breeding of virus-free seedlings, requiring highly technical, must produce virus-free seedlings and field units and units introduced purchase Miao, seedlings in order to avoid impure and failure. 2. Can not be stubble virus-free seedlings, can not be planted in the crop of apple orchard. After the former crop of old fruit trees are removed, the orchard must be deeply rooted, cleared of residual roots, and planted with green manure or other crops for 4 to 5 years before replanting. No disease