金冠苹果高产稳产、果大质优、适应性强、容易管理 ,但果锈发生普遍 ,大大降低了果实商品价值。1　发生原因果锈是发生在金冠果实表面的一种生理性病害 ,其主要表现为果实表面浮生锈色木栓化物质。该病的发生是内在的和外界的多种因素综合作用的结果。1 1　内在因素　金冠果锈 Golden Delicious apple with high and stable yield, high quality and good, adaptable, easy to manage, but widespread rust fruit, greatly reducing the value of the fruit commodity. 1 is the cause of the fruit rust occurs in the Golden Delicious fruit surface of a physiological disease, the main performance of the fruit surface floating rusty wood cork material. The occurrence of the disease is the result of a combination of internal and external factors. 1 1 Internal factors Golden Delicious fruit rust