梨“黑星病”也称“雾病”,在辽宁西部地区历年普遍发生,危害甚重,尤其花盖梨品种,常因雾病危害造成毁灭性的损失。因此,防治梨黑星病是当前梨树生产上迫切需要解决的问题。多年生产实践证明,防治梨黑星病喷布波尔多液有良好的效果。但是,过去各地多喷用200～240倍液波尔多液,由于药剂浓度较大,前期梨果普遍地出现了程度不同的药 Pear “scab” also known as “fog disease”, occurred in the western Liaoning over the calendar year, is very dangerous, especially to cover pear varieties, often caused by devastating damage caused by fog. Therefore, the prevention and control pear scab is an urgent need to solve the current pear production. Years of production practice has proved that prevention and treatment of pear scab spray Bordeaux mixture has a good effect. However, in the past with more spray 200 ~ 240 times the liquid Bordeaux mixture, due to the greater concentration of pesticides, pre-pear generally appeared in varying degrees of medicine