我场苹果树是在1975年栽植的,分三个大区,在苹果树幼龄阶段即开始发生腐烂病。1979年先在间种蔬菜的北大区发现病株,1981年发病株率增至2.9%,病斑大部分在树干的偏南方向。为了给今后苹果幼树管理提供依据,我们对果园间作与发生腐 My field of apple trees was planted in 1975, divided into three regions, in the young stage of apple trees that began to rot disease. In 1979, the first diseased plants were found in the northern part of the inter-planting vegetables. In 1981, the diseased plants increased to 2.9%. Most of the lesions were in the direction of the south of the trunk. In order to provide the basis for the future management of young apple trees, we intercropping and rotting orchards