东北地区作为苹果主产地之一 ,每年为市场提供大量优质苹果。苹果的栽培生产受许多条件的影响 ,其中很关键的一个条件就是受病虫害侵害的程度。长期实践证明 ,做好病虫害防治工作是苹果优质丰产的前提和保证。下面就东北地区苹果生长发育过程中发生普遍、危害比较严重的一些病 Northeast China, as one of the main producing areas of apple, provides a large number of high-quality apples to the market each year. Apple cultivation and production are affected by many conditions, one of the key conditions is affected by pests and diseases. Long-term practice has proved that good pest control is the premise and guarantee of high quality and high yield of apples. Following the apple growing in the northeast region in the process of occurrence of common, more serious damage to some of the diseases