脱毒苹果幼树树势强旺，生长量大，有利于早成形，早投产。但如果管理不当，容易引起新梢停长晚，抗寒性降低，在越冬过程中易出现抽条，发芽前易伴随发生胴枯病、腐烂病、轮纹病等枝干病害，导致局部枯枝和整株死树。为了减少或防止以上现象的发生，要做好以下几个方面的... Virus-free young apple trees strong growth, large growth, is conducive to early shape, early production. However, if not properly managed, it is easy to cause the shoots to end up late and the cold resistance is reduced. In the process of wintering, it is easy to pull out the shoots and the stem blight, Branches and whole plant dead trees. In order to reduce or prevent the occurrence of the above phenomena, we must do the following aspects ...