苹果腐烂病是苹果树的一种严重的病害,病重的果树干上病疤累累,枝干残缺不全,甚至整株枯死,有人称之为毁灭性病害.解放后辽宁省苹果产区,曾由于冻害造成树势衰弱而有过四次大流行,损失严重.黄河故道地区地境偏南,雨水较多.生长季节长,加之幼、中龄树多,长势旺,愈伤能力强,没有形成过大流行,所以,有人认为在故道地区该病不能形成危害.苹果腐烂病病原菌在较老果园中普遍存在,由伤口侵入枝干,具有潜伏侵染现象.据调查,河南省仪封、人和园艺场,黄泛区农场和江苏等地果园均有发生,说明该病菌在黄河故道地区能够引起侵染和发病.影响苹果腐烂病发病的因素很多,如严重的大小年,冻害引起树势衰弱,土壤水分不足,枝条失水.愈伤组织形成慢,施肥不适当,缺少磷、钾肥等均能为其发生与流行创造适宜条件.而在果树正 Apple rot disease is a serious disease of apple trees, sick tree trunk disease scarring, incomplete branches, and even the whole plant dead, some people call it a devastating disease.After the liberation of the apple producing areas in Liaoning Province, had There were four major pandemic losses caused by frost damage, and the loss was serious in the Yellow River, where the ground is relatively southward with heavy rainfall, and the growing season is long, with more young and middle-aged trees, growing prosperous and more callus, without The formation of a pandemic, so some people think that the disease can not form a hazard in the old path.Apple rot pathogens widespread in older orchards, invasion from the wound stems, with latent infection.According to the survey, Henan Province, People and horticultural fields, the Yellow River area farms and orchards in Jiangsu and other places have occurred, indicating that the bacteria in the Yellow River in the area can cause infection and incidence of diseases affecting apple rot disease many factors, such as the serious size of the year, frost damage caused by the tree Potential weakness, insufficient soil moisture, water loss of branches, slow formation of callus, improper fertilization, lack of phosphorus, potash, etc. can create appropriate conditions for its occurrence and prevalence.