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苹果树的主要骨干枝受到腐烂病为害后,常有一大块树皮烂掉成为大病疤,皮层输导组织被切断,病疤上下部养分输送受到阻碍,轻者树势衰弱,严重时(枝干烂一圈)病枝或病树整个死亡,是苹果树一大毁灭性病害,对苹果生产造成极大损失。但在加强综合防治的前提下,通过桥接就
After the main branches of apple tree rot disease damage, often a large bark rot to become a serious disease scars, cortical conduction tissue is cut off, suprachiasmatic disease of the upper and lower nutrient transport is impeded, the light tree weak, severe (branches Dry rotten circle) diseased branches or diseased trees whole death, is a big devastating disease of apple trees, causing great losses to apple production. However, on the premise of strengthening comprehensive prevention and control, it will be bridged