梨黑星病是我地梨产区主要病害之一，过去多使用早基托布津、多菌灵、代森锰锌等农药防治，全年喷６～７次，由于多年连续使用，产生抗药性，防治效果不太理想。为了寻找防治梨黑星病高效杀菌剂，１９９７年进行了多霉清田间防效试验，收到了良好的效果。１材料与方法试验... Pear scab is one of the major diseases in the pear-producing area in our country. In the past, we used pesticides such as early-base thiophanate, carbendazim and mancozeb for spraying and spraying for 6 to 7 times throughout the year. As a result of continuous use over many years, Medicinal, control effect is not ideal. In order to find the prevention and cure Pear Scythes efficient bactericides, in 1997 carried out more mold mildew field efficacy test, received good results. 1 materials and methods test ...