梨黑星病又名疮痂病、雾病、黑斑病,是梨树上发生较严重的一种病害。胶东半岛发病严重的梨园,果实发病率达70％,叶片发病率80—90％。造成梨早期落叶,甚至秋末二次开花,削弱树势,影响下一年的产量。不同的年份,发病轻重不同。1974年以来,我们对梨黑星病进行了观察、防治试验研究。发病规律 (一)梨黑星病主要以菌丝和分生孢子在梨树的芽内、病梢、病叶、病果上越冬。次年4月上、中旬, Pear scab is also known as scab disease, fog disease, black spot, is a more serious disease on the pear. Severe pear orchard in the Jiaodong Peninsula, the incidence of fruit reached 70%, the incidence of leaves 80-90%. Pear caused early leaves, and even the late autumn flowering, weakening the tree potential, affecting the next year’s production. Different years, different severity of illness. Since 1974, we have observed pear scab, prevention and control of experimental research. Pathogenesis (A) pear scab The main mycelium and conidia in the buds of pear, disease tip, diseased leaves, sick fruit on the winter. The following year in April, mid,