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[目的]为番木瓜高产优质栽培提供依据。[方法]对云南种植区番木瓜白粉病的病原菌进行了鉴定,并对其危害症状、发生和流行因素进行了观察和分析。[结果]番木瓜白粉病病原菌无性世代属半知菌亚门、丝孢纲、丝孢目,其子实层呈白粉状,分生孢子近椭圆形;该病主要危害番木瓜叶片、花芽,严重时也危害果实、果梗;番木瓜白粉病的发生和流行与气象条件关系密切,空气相对湿度低于25%时其分生孢子仍可萌发并侵入危害,分生孢子的最适萌发温度为20～25℃;栽培管理不当也是病害发生、流行的重要因素之一。[结论]加强栽培管理,同时结合药剂防治可有效控制番木瓜白粉病的发生和蔓延。
[Objective] The research aimed to provide the basis for high-yielding and high-quality cultivation of papaya. [Method] The pathogenic bacteria of papaya powdery mildew in Yunnan planting area were identified, and their harmful symptoms, occurrence and epidemic factors were observed and analyzed. [Result] The pathogens of papaya powdery mildew were subdivided into the subdivision Amycolatopsis, the family Silicocerca and the family Silicocarp. The fruiting layer of the papaya powdery mildew was white powder and the conidia were nearly oval. The disease was the main hazard to papaya leaves and flower buds , Serious harm to fruit, fruit stems; Papaya powdery mildew occurrence and prevalence and weather conditions are closely related to the air relative humidity below 25% of the conidia can still germinate and invasive, conidial optimum germination The temperature is 20 ~ 25 ℃; improper cultivation management is also one of the important factors of disease occurrence and epidemic. [Conclusion] Strengthening the cultivation management and controlling the occurrence and spread of Papaya powdery mildew effectively with the combination of chemical agents.