梨黑星病(Venturia nashicola)是豫东地区梨树的主要病害,近几年,发病呈上升趋势。笔者于1995～1998年对梨黑星病的发病规律及防治技术进行了试验研究,初步探索出一套有效的防治措施。1 发生特点1.1 梨黑星病菌主要以菌丝体在梨芽内越冬,翌春梨芽萌发,病菌随之扩展,经短期潜育,于4月中下旬开始产孢,并延续到6月中下旬。此期正值梨树 Pear scab (Venturia nashicola) is the major disease of pear trees in eastern Henan, in recent years, the incidence is on the rise. The author from 1995 to 1998 on the incidence of pear scab law and prevention and treatment of experimental research, initially explored an effective control measures. 1 Occurrence characteristics 1.1 Pearsis pear mainly mycelium winter in the pear bud, pear sprout germination next spring, the bacteria will expand, short-term potential, in April beginning of late sporulation, and continued until mid-June Late. This period is at a pear tree