近几年,随着各地果树面积的大幅度增加,以危害苹果树为主的果树根腐病日趋严重。如闻喜县东官庄村—20亩苹果园,病株率达72.5％,许多苹果树因此死亡。此病的发生,严重影响了果树生产。 一、发病条件与症状 据调查,苹果树根腐病的发生与果树根系强弱密切相关。干旱、缺肥、土壤盐碱化,水土流失、土壤板结通气不良、结果过多、大小年严重以及病 In recent years, with the substantial increase in the area of ​​fruit trees throughout the country, the root rot diseases of fruit trees, which are mainly endangered by apple trees, have become increasingly serious. Such as Wenxian County East Village 20 acres of apple orchards, diseased plants rate of 72.5%, many apple trees died. The occurrence of this disease has seriously affected the fruit tree production. First, the incidence conditions and symptoms According to the survey, the occurrence of apple tree root rot is closely related to the strength of the root system of fruit trees. Drought, lack of fertility, salinization of soil, soil erosion, poor soil compaction, poor outcome, severe and severe year and disease