梨黑星病又称疮痂病、雾病 ,是我省高寒山区梨树的主要病害。常造成较大的损失。发病后 ,引起梨树大量落叶 ,幼果被害后呈畸形 ,不能正常生长膨大 ,同时病树第二年结果减少。为了能有效地进行防治 ,我们于１９９５～１９９６年 ,在尚志市和宁安市等地选择具有山地典型代表的梨 Pear scab disease, also known as scab, fog disease, is the main disease pear trees in the alpine mountains in our province. Often cause greater losses. After onset, causing a large number of pear leaves, young fruit was deformed after deformity, not normal growth and enlargement, while reducing the second year result of diseased trees. In order to effectively prevent and control, we in 1995 ~ 1996, in Shangzhi City and Ning’an City and other places to choose a typical representative of the mountain pears