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对苹果黄叶病、小叶病、缩果病、烂根病的防治，一般果园多安排在生长期进行，往往效果较差，有效期短。如结合秋施基肥防治四种病害效果较好，具体作法是：防治黄叶病，依树体大小每株在基肥中混施硫酸亚铁０．２５～０．５ｋｇ，效果可维持１～２年。防治小叶病，每株与...
On apple yellow leaf disease, leaflet disease, fruit shrinkage, rotten root disease prevention and control, the general arrangement of orchards and more in the growth phase, often less effective, short effective period. For example, combining with autumn base fertilizer to control four kinds of diseases, the effect is better, the specific method is: prevention and treatment of yellow leaf disease, according to the tree size per plant in the basal fertilizer mixing ferrous sulfate 0.25 ~ 0.5kg, the effect can be maintained 1 ~ 2 year. Prevention of leaflet disease, each with ...