香草兰细菌性软腐病发生规律研究初报

Occurrence Regularity of Bacterial Soft Rot in Vanilla

田间病害调查及系统观察结果表明；香草兰细菌性软腐病在海南省分布较广且周年均可发生。４～１０月份为病害盛发期。高温、多雨、高湿是病害发生发展的重要条件。低温干旱季节发病较轻。植株病残体和株下表土是本病浸染来源。在植株上爬行的昆虫和软体动物是本病菌传播媒介。

Field investigation and observation showed that bacterial soft rot in vanillafragrans might occur all the year round with the peak period starting from April to October. High temperature, rainy days and high humidity are the major factors for development of this disease, and lower temperature and dry seasons will reduce or con-strain its developmint. The remnants of the diseased plant and the surface soil underneath are disease sources. Insects and mollusks feeding on or crawling on diseased plants are Vectors of the disease.