我国种植的苹果面积很大,但是,由于苹果轮纹病发生严重,并且难以防治,每年果农将蒙受重大的经济损失。目前,由于广大果农一直采用老的防治方法使轮纹病发生越来越重,据专家报道我国每年因轮纹病危害造成直接经济损失就达30亿到50亿元人民币。苹果轮纹病在我国的发生区域和范围 The apple crop in our country is very large. However, due to the serious occurrence of apple ring disease and the difficulty of prevention and control, the apple-growers will suffer major economic losses each year. At present, as the majority of fruit growers have been using the old prevention and control methods to make the disease more and more serious, according to the experts, the direct economic losses caused by the annual occurrence of the disease in China have reached 3 billion to 5 billion yuan. Apple ring disease in our region and the scope of occurrence