黄冠梨因其外形美观、皮薄肉细,且早果早丰、高抗黑星病,在我市栽培面积逐年扩大。但从2002年开始,果面上出现一些不规则花斑,形似鸡爪,严重影响果实外观品质,发生重的果园病斑果可达40%～50%,给果农造成极大的经济损失。为了弄清其发生规律,探索发生原因,2003～2004年连续2a(? Huang Guan pear because of its beautiful appearance, thin thin, and the early fruit early Feng, anti-scab, growing area in the city expanded year by year. However, since 2002, there appeared some irregular flower spots on the fruit surface, forming the shape of chicken feet which seriously affected the appearance quality of the fruit. Heavy fruit orchard lesions could reach 40% -50%, causing great economic losses to the farmers. In order to find out the regularity of its occurrence and to explore the causes, continuous 2a (?