苹果树腐烂病苹果树腐烂病是我国北方苹果产区的主要病害。我省历年皆有发生,为害树体枝干,致树皮腐烂,造成伤疤,削弱树势,影响产量,重者死枝死树。因此,防治本病已成为生产上的首要任务。(一)发生规律(1)发病时期腐烂病菌的寄生能力较弱,先在死组织上侵入潜伏,当树势减弱时,才向附近的健全组织侵袭扩展。在辽南地区一般从2月下旬开始 Apple tree rot disease Apple tree rot disease is the main disease in northern apple-growing areas in China. All over our province have happened all the time, damage the branches of trees, causing bark rot, resulting in scars, weakening the tree potential, affecting the yield, dead tree dead. Therefore, prevention and treatment of this disease has become the primary task of production. (A) the occurrence of law (1) pathogens at the onset of parasitic capacity of bacteria is weak, the first invasion of dead tissue invasion, when the weakening of the tree, the invasion of the expansion of the nearby sound organization. In southern Liaoning generally from late February