梨黑屁股病是随着套袋梨的发展逐步严重起来的一种新病害,果农称之为梨黑屁股病,主要指的是在梨花萼处出现黑点或者黑斑,一旦发病任何药剂都无法消除黑色病斑,使大量梨果失去商品价值,给果农造成严重损失。特别是黄冠梨、绿宝石在果实生长后期遇到降雨多、 Pear black buttock disease is with the development of bagged pear gradually serious a new disease, farmers call it pear black ass disease, mainly refers to the pear calyx at spots or dark spots, once the onset of any drug are Can not eliminate black spots, so that a large number of pear fruit lose the value of commodities, causing serious losses to farmers. In particular, Huang Guan pear, emerald met more rainfall in the late fruit growth,