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苹果树腐烂病是我国北方果区危害较严重的苹果病害。乌盟农牧学校由于气候寒冷，发病严重，再加上管理不善，树势衰弱，防治不及时，致使苹果树腐烂病严重流行，造成大批果树死亡。一、症状果树受害皮层腐烂坏死，初期软而多汁，用手指轻按即可下陷，外表发生水演状、红褐色、?
Apple tree rot disease is more serious harm to apple trees in North China fruit area. Due to the cold weather, serious illness and the mismanagement, the weakness of the trees and the short time of prevention and treatment led to the serious epidemic of apple tree rot disease, resulting in the death of a large number of fruit trees. First, the symptoms of fruit trees damaged cortical necrosis, the initial soft and juicy, tap with your fingers can be subsided, the appearance of water play the appearance of red-brown,?