一、症状腐烂病主要为害果树的枝干,幼树和苗木也可被害。受害皮层腐烂坏死,其症状表现有溃疡和枯枝两种类型。以溃疡型为主。发病初期,病部呈红褐色,略隆起,水渍状,组织松软,用手一按即下陷,病部常流出黄褐色汁液,病皮极易剥离。腐烂皮层鲜红褐色,湿腐状,有酒糟味。有时病斑呈深浅相间的轮状,边缘不清晰。发病后期,病部失水干缩,变黑 First, the symptoms of rot disease mainly harmful fruit tree branches, young trees and seedlings can also be victims. Victims of cortical necrosis, the symptoms of ulcer and dead branches showed two types. The main type of ulcer. Early onset, the disease was reddish brown, slightly uplift, water-like, soft tissue, a hand that is subsidence, the disease often shed yellow brown juice, the skin easily peeled. Decayed cortex bright reddish brown, wet rot, wine bad smell. Sometimes the lesion was dark and white round, the edge is not clear. Late onset, disease dehydration dry shrink, black