苹果腐烂病是苹果产区重要病害,在我郊区也是发生普遍,为害严重。近几年由于此病的蔓延大片大片的果园近毁掉。目前从科研部门的研究表明,病疤重犯原因有三种: 1、发病部位树皮烂透以后腐烂病菌菌丝侵入木质部带菌,木质部内的病菌菌丝继续蔓延侵害病疤四周树皮而引起重犯,这种 Apple rot disease is an important disease in the apple producing area, which is also common in the suburbs of my country, causing serious damage. In recent years due to the spread of large tracts of orchards nearly destroyed. At present, research from the scientific research department shows that there are three reasons for the recurrence of the scar: 1. The mycelia of the rotting bacteria invade the xylem after the bark is rotten. The mycelia in the xylem continue to spread on the bark surrounding the scar, This