一、症状和类型 　　苹果腐烂病主要危害结果的枝干，以主干分枝处最易发生，幼树和苗木也可发生，一般情况下进入盛果期后容易发病，受害树皮腐烂坏死具有溃疡型和枝枯型两种类型。 　　1、溃疡型：发病初期病部呈红、褐色稍降起水溃状，组织松软，用手指压即行下陷，具有酒糟 First, the symptoms and types Apple rot disease main endangering the results of the branches to the main branch of the most prone to saplings and seedlings can occur, under normal circumstances into the full-blown period prone to disease, the victim bark decay necrosis with ulcers Two kinds of types and branches dry type. 1, ulcer type: the early onset of disease was red, brown slightly lower water ulceration, soft tissue, the pressure with your fingers that sag, with lees