我省梨树的病害较多。对生产危害最大的属梨黑星病(Venturia pirina Aderh[Fusicla-dium pyrinum(Lib)Fuck]。有些产区在阴雨多湿年份,由于该病的危害,造成严重减产,果品质量下降,影响经济收入和市场供应;还会损伤树势,影响花芽分化和下年的果品产量。因 Pear trees in our province more disease. Venturia pirina Aderh [Fusicla-dium pyrinum (Lib) Fuck], which is the most damaging to the production, has serious production loss due to the damage of the disease in rainy and wet years, and the quality of the fruit declines, affecting the economic income And the market supply; Will also damage the tree potential, affecting the flower bud differentiation and the next year’s fruit production