番茄芝麻斑病菌的侵染条件及致病性研究  

Studies on Infectious Condition and Pathogenicity of Tomato Helminthosporium carposaprum Pathogen

作　　者：康立功[1] 齐凤坤[1] 许向阳[1] 李景富[1] 

机构地区：[1]东北农业大学园艺学院番茄研究所,黑龙江哈尔滨150030

出　　处：《中国蔬菜》2010年第10期64-67,共4页China Vegetables

基　　金：国家科技支撑计划项目(2006BAD01A7-3-02);黑龙江省科技创新团队项目

摘　　要：对番茄芝麻斑病菌侵染条件及致病性的研究表明,温度与保湿时间对番茄芝麻斑病菌的侵染有很大的影响。当温度为10℃时,病原菌潜育期达120h;当温度为25～30℃时,潜育期仅为74h。叶面保湿时间越长,越有利于病原菌的侵染,叶面最少保湿时间为6h。病原菌侵染的最佳温度和保湿时间组合为:温度25～30℃,保湿时间42～48h。不同番茄品种对病菌的敏感性差异较显著,704、7929、7913为感病品种,08HN31、7945、08HN30为抗病品种。不同菌龄病原菌对番茄的致病性也有差异,培养10d的菌株致病力较强,培养5d和20d的菌株致病力较差。Studies on infectious condition and pathogenicity of Helminthosporium carposaprum have indicated that temperature and moisture keeping period can greatly affect the infection of Helminthosporium carposaprum.When the temperature was 10 ℃,the pathogen incubation period was 120 h.When the temperature was 25 - 30 ℃,the incubation period was only 74 h.The longer the moisture keeping period,the shorter the being infectious period.The shortest leaf moisture keeping period was about 6 h.The best combination of temperature and moisture keeping period for infection was 25 - 30 ℃ and 42-48 h.The susceptibilities of different tomato varieties to Helminthosporium carposaprum were significantly different.704,7929,7913 were susceptible varieties,08HN31,7945,08HN30 were resistant varieties.There existed differences in pathogenicities of different seedling ages.The pathogenicity of 10 days age was the strongest,while that of 5 days or 20 days ages were the weakest.

关 键 词：番茄 芝麻斑病菌 侵染 致病性 

分 类 号：S436.412.19[农业科学—农业昆虫与害虫防治]