短穗鱼尾葵灰斑病菌的鉴定及生物学特性  

Identification of the pathogen of gray leaf spot on Caryota mitis and its biological characteristics

作　　者：陈剑[1] 纪烨斌[1] 张能[1] 谢昌平[1] 

机构地区：[1]海南大学环境与植物保护学院,儋州571737

出　　处：《植物保护》2011年第4期48-51,57,共5页Plant Protection

基　　金：海南大学科技基金项目(Rnd0524)

摘　　要：[目的]明确引起短穗鱼尾葵灰斑病的病原菌及该菌的生物学特性。[方法]从短穗鱼尾葵感病组织上分离、纯化病菌,经致病性测定后根据其形态特征进行种类鉴定,并测定其在不同培养条件下的生物学特性。[结果]引起短穗鱼尾葵灰斑病的病原菌为小孢拟盘多毛孢菌[Pestalotiopsis microspora(Speg.)Satista & Peresapud Batista]。该菌在PSA培养基上长势最好;菌丝生长和孢子萌发的最适温度为25℃;完全光照条件最利于菌丝的生长和产孢;在pH5时菌丝生长最好,pH6时孢子萌发率最高,pH2时孢子不萌发;孢子的致死温度为50℃。[结论]上述结果可以为短穗鱼尾葵灰斑病的防治提供依据。[Objective] To identify the pathogen causing the gray leaf spot of Caryota mitis Loureiro and understand its biological characteristics.[Method] The pathogen was isolated and purified from the infected C.mitis,and its pathogenicity to the host and its biological characteristics were tested.The pathogen was identified according to its characters.[Result] Gray leaf spot of C.mitis was caused by Pestalotiopsis microspora(Speg.) Satista & Peresapud Batista.The pathogen growth in the medium PSA was the best;The optimum temperature for hyphal growth and spore germination was 25 ℃.Full illumination was most conducive to hyphal growth and sporulation.Hyphal growth was the best at pH 5,and spore germination rate was the highest at pH 6,but pH 2 was not inhibitory to germination.The lethal temperature for spores was 50 ℃.[Conclusion] The results could provide a reference for the control of the gray leaf spot of C.mitis.

关 键 词：短穗鱼尾葵 拟盘多毛孢菌 生物学特性 

分 类 号：S436.8[农业科学—农业昆虫与害虫防治]