辣椒叶斑病的病原菌生物学特性研究  

Biological Characteristics of Pepper Leaf Spot Pathogen——A New Disease in China

作　　者：黄欣阳[1] 刘志恒[1] 杨红 亓烨[1] 胡积祥[1] 王世维[1] 

机构地区：[1]沈阳农业大学植物保护学院,沈阳110866 [2]大连民族大学环境与资源学院,辽宁大连116600

出　　处：《园艺学报》2013年第2期275-282,共8页Acta Horticulturae Sinica

摘　　要：针对在中国辽宁省设施栽培辣椒上首次发现的新病害辣椒叶斑病,鉴定其致病菌为尖孢枝孢(Cladosporium oxysporum)。对该病的症状进行了描述,并对病菌的生物学特性进行了系统测定:病菌菌丝生长以V8汁培养基为最适;能有效利用多种糖和氮源,分别以山梨醇和麦芽浸膏最佳;菌丝适宜生长温度为20～25℃;最适pH6～8;光照可促进菌丝生长;菌丝致死温度为77℃。病菌分生孢子萌发适宜温度为20～30℃;最适pH7;光照对孢子萌发无明显的促进作用;分生孢子致死温度为48℃。The newly occurred pepper disease, pepper leaf spot, observed in greenhouse of Liaoning Province was studied. The pathogen was identified as Cladosporium oxysporum. The damage and symptoms of this disease were reported. The results of the biological characteristics of the pathogen showed that the best medium for mycelial growth was V8 juice. Pathogens can effectively use of sugar and nitrogen sources. Sorbitol and malt extract could be used as better carbon and nitrogen sources for growth. The optimum temperature for mycelial growth was 20 ℃ to 25 ℃. The optimum pH was 6 to 8. Light could promote mycelial growth. The mycelia lethal temperature was 77 ℃. The optimum temperature for eonidium germination was 20 ℃ to 30 ℃. The optimum pH was 7. Light had no obvious promoting effect on conidium germination. The conidium lethal temperature was 48 ℃.

关 键 词：辣椒 叶斑病 尖孢枝孢 生物学特性 

分 类 号：S641.3[农业科学—蔬菜学]