试验设在青岛市农科所果园，供试品种为易感病的新红星，树龄6年生，树势中等、均匀一致，每一药剂浓度为一处理，每处理重复3次。1.5％多抗霉素试验浓度为200、300、350、400、450、500倍液，以法国产50％扑海因1500倍液和国产70％代森锰锌700倍液为标准对比药剂，以生产防治 The experiment is located in the orchard of Qingdao Agricultural Institute, the tested varieties are susceptible disease of New Star, 6-year-old trees, trees moderate, uniform, each concentration of a treatment agent, each treatment repeated three times. 1.5% polyoxin test concentration of 200,300,350,400,450,500 times, to France 50% of the domestic seaweed 1500 times and domestic 70% mancozeb 700 times as the standard contrast agent, To produce control