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台湾相思(Acacia confusa Merr)是海南岛防护林的主要树种之一。多年来,在该岛北部各县台湾相思上发生一种根腐病,为害严重,造成树木大量死亡。1982年调查了国营红华农场17条防护林带,原有台湾相思41.5亩,因根腐病大量致死,仅残存1,680株,保存面积只有10%,个别林带的台湾相思全部死光。过去有人将它误认为是橡胶红根病(Ganodermapseudoffereum (Walkef) Over & Steinm)。但这种新的根腐病症状和病菌产生的子实体与橡胶红根病菌有明显的区别。经中国科学院微生物研究所鉴定后,认为此菌是热带灵芝(Ga-noderma tropicus (Jungh) Bress),与橡胶红根病菌同属担子菌多孔菌科灵芝菌属。此菌终年为害。从4月起到11月止,在寄主植物上大量形成子实体,一般着生在感病植
Acacia confusa Merr is one of the main species of shelterbelts in Hainan Island. Over the years, a root rot occurred in the various counties of Taiwan in the northern part of the island, causing serious devastation and causing a large number of trees to die. In 1982, 17 shelter belts of state-owned Honghua Farm were investigated. The original 51.5 acre of Acacia in Taiwan was found to have died of a large number of root rots, leaving only 1,680 remaining plants with a preserved area of only 10%. All the acacia plants in Taiwan were dead. In the past it was mistaken for Rhododendron disease (Ganodermapseudoffereum (Walkef) Over & Steinm). However, this new root rot symptoms and pathogens produced by fruiting bodies and Rhodococcus rhodochrous have significant differences. After identification by Institute of Microbiology, Chinese Academy of Sciences, the strain is considered to be Ga-noderma tropicus (Jungh) Bress. The bacteria harmful. From April until November, a large number of fruiting bodies are formed on host plants,