果树腐烂病 ,尤其是苹果、梨、山楂、桃等北方果树上的腐烂病一直是困惑北方果区的三大枝干病害之首 ,每年都严重威胁着果品生产。现在生产上防治腐烂病存在着只重视春季防治而忽视秋季集中侵染期防治的错误认识和做法 ,很值得纠正。1　改变重点防治环节腐烂病的发生规律已基本 The decay of fruit tree rot disease, especially apple trees, pears, hawthorn, peaches and other northern fruit trees has always been the head of the three major branch diseases in the northern fruit region and threatens the production of fruit products every year. At present, there are mistaken ideas and practices in prevention and control of rotting diseases in production only focusing on the prevention and control of the spring but neglecting the prevention and control of the concentrated infection in autumn. It is worth correcting. 1 change the focus of the prevention and control of the occurrence of rot disease has been basic