滇楸叶斑病病原菌的生物学特性及其抑菌药剂筛选  

Biological characteristics of leaf spot disease pathogen on Catalpafargesii and its fungicides screening

作　　者：傅本重[1,2] 杨敏[2] 李国元[1] 王立华[1] 邹礼平[1] 吴瑶[1] 

机构地区：[1]湖北工程学院生命科学技术学院/特色果蔬质量安全控制湖北省重点实验室,孝感432000 [2]西南林业大学林学院,昆明650224

出　　处：《华中农业大学学报》2013年第6期65-69,共5页Journal of Huazhong Agricultural University

基　　金：国家自然科学基金项目(31200488);云南省应用基础研究计划项目(2011FB066);特色果蔬质量安全控制湖北省重点实验室开放基金项目(2013K02)

摘　　要：为明确滇楸叶斑病病原菌（Glomerella cingulata）的生物学特性和选用最适抑菌剂,对不同条件下的病原菌菌丝生长进行了观察和室内药剂平板筛选。结果表明：该病原菌菌丝生长的适温为21~28℃,致死温度为45℃,在pH 4~7的范围内生长良好,碳源和氮源分别以蔗糖和硝酸钠为宜;在供试5种药剂中,10%苯醚甲环唑抑菌效果最好,在质量浓度1.00mg/mL时相对抑菌率为93.6%;45%石硫合剂抑菌效果最差,在质量浓度6.70mg/mL时相对抑菌率仅为13.4%。In order to describe the biological characteristics of Catalpa fargesii f. duclonxii leaf spot pathogen （Glomerella cingulate）, and to select suitable fungicides against it, the mycelial growth in different conditions were observed, and the fungicides against the pathogen were investigated in this pa- per. The results indicated that the pathogen mycelia grew well under 21-28 ℃, pH 4-7, and the lethal temperature was 45 ℃. Optimal carbon and nitrogen source were sucrose and NaNOa respectively. The most effective fungicide was 10% difenoconazole among the 5 tested reagents, and the relative inhibition rate was 93. 6% with the recommended concentration.

关 键 词：滇楸 叶斑病 病原菌 生物学特性 药剂筛选 

分 类 号：S436.8[农业科学—农业昆虫与害虫防治] S432.44[农业科学—植物保护]