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<一>黑斑病(黑痣病):为害果实,亦可侵染叶、基、枝梢等。病斑为褐色粉点状,严重时3—5个病斑连接成0.5—5毫米的龟裂。叶面病斑最初出现小斑,内部干燥后病斑脱落,形成圆孔。为害枝干时,在新梢处出现褐色圆形隆起斑,引起枝条枯死。防治方法:整枝,增加肥料,早春喷波美4—5度石硫合剂,花期前后每隔10—15天喷65％代森锌500倍液或0.3度波美石硫合剂。
black spot disease (mole disease): harmful fruit, but also invade the leaves, roots, shoots and so on. Lesions are brown powdery spots, 3-5 lesions in serious connection 0.5-5 mm crack. The initial appearance of foliar lesion small spots, internal dry spots off after the formation of round holes. Damage to the branches, the new shoots appear brown round bumps, causing branches dead. Prevention and treatment methods: pruning, increase fertilizer, early spring Spray beauty 4-5 degrees stone sulfur mixture, before and after florescence every 10-15 days spray 65% dendritic zinc 500 times liquid or 0.3 degrees Boulder sulfur mixture.