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苹果树腐烂病的发生发展规律,经近年来在陕西秦岭高地凤县研究发现,腐烂病菌主要是先在树皮的落皮层扩展,积聚侵染势,进而侵害树皮健组织.夏季,苹果树体的某些部位形成落皮层.当落皮层组织已经死亡而尚未失水干翘时,由于病菌在这类组织中扩展,树体的这些部位即发生病变.夏秋季内苹果树处于活跃生长期,生活力旺盛,抵抗力较强,病菌的扩展受到限制,发病后一般是形成表面溃疡.
Apple tree rot disease occurrence and development of law, in recent years in Shaanxi Qinling Highland Fengxian study found that rot bacteria mainly in the bark of the deciduous layer expansion, accumulation of infectivity, and thus damage bark tissue.In summer, apple trees Some parts of the body forming the drooping layer.When the drooping tissue has died and not yet dehydration and dry, due to the expansion of bacteria in these tissues, these parts of the tree that lesions occur.In summer and autumn, the apple tree is in an active growth period, Strong vitality, strong resistance, pathogen expansion is limited, the incidence is generally the formation of surface ulcers.