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在云南西双版纳橡胶树上发生了两种新病害,一种是引起橡胶树死亡的基腐病,另一种是引起胶树产量减少或不产胶的树干褐斑病.经镜检标本、病原菌分离、致病性测定和菌落形态特征观察、镜检分生孢子的形态和着生方式,鉴定结果为腹状镰刀菌Fusarium venfricosum,茎干褐斑病病原菌鉴定为多隔镰刀菌Fusarium decemcellulare.这两种新病害的出现可能与持续几十年种植橡胶树,在环境和营养的长期胁迫下出现树体衰退(Decline)有关.
Two new diseases occurred in the rubber tree of Xishuangbanna in Yunnan Province, one was the rot that caused the death of the rubber tree and the other was the brown leaf spot that caused the decrease of the yield of the rubber tree or the non-gum production.After the microscopic examination and separation of pathogenic bacteria, Pathogenicity test and morphological observation of colony, microscopic examination of conidia morphogenesis and way of birth, the identification result was Fusarium venfricosum, and the pathogen of stem brown spot was identified as Fusarium decemcellulare. Emergence of new diseases may be related to planting rubber trees for decades and causing declines under prolonged environmental and nutrient stress.