黑星病又叫疮痴病、雾病、斑病或黑斑病等,分布我国东北、华北与西北各梨产区。东北重点发生县有辽西省的绥中、锦西、北镇、义县、兴城和热河的青龙等县。这些地区因黑星病为害,所受损失是相当严重的。譬如,绥中县产梨最多的二区有“二区梨,二八扣”的流行语,形容本病发生的程度。又如锦西县,据农林科负责同志估计,1951年该县所产的品质优良 Scab also known as ulcer disease, fog disease, spot disease or black spot disease, distribution of Northeast China, North China and Northwest pear regions. The northeastern key counties in western Liaoning Province Suizhong, Jinxi, North Town, Yixian, Xingcheng and Rehe and other counties. The damage caused by scab in these areas is very serious. For example, Suizhong County has the largest number of pears in the second district “Second District Pear, 28 buckle ” buzzwords, described the extent of the disease. Another example is Jinxi County, according to comrades responsible for agriculture and forestry is estimated that in 1951 the county produced high quality