一、软腐病。该病是夏季铁皮石斛的主要病害,高温高湿环境最易发生,且发病快。其病原菌多从根茎处侵染,开始受害处为暗绿色水浸状,迅速扩展呈黄褐色软化腐烂。腐烂部位有特殊臭味。严重时,叶片迅速变黄。因此,要加强棚内管理,注意通风透光和降低棚内湿度;该病原菌从移植及管理作业中产生的伤口、害虫食痕处或植株基部自然脱叶裂口伤口侵染为害。 First, soft rot. The disease is the main disease of Dendrobium candidum, the most likely to occur in high temperature and humidity environment, and the incidence of fast. The pathogen mostly infected from the rhizome, the victim began to dark green flooding, rapid expansion of yellow brown softening decay. Rotten parts have a special smell. In severe cases, the leaves turn yellow rapidly. Therefore, we should strengthen the shed management, pay attention to ventilation and reduce shed humidity; the pathogen from the transplant and management operations arising from the wounds, pests eaten marks at the base of the plant or the natural defoliation split wound damage.