草坪草品种抗叶枯病的结构抗病性与病害发生因素  

Structural defense of turf grass varieties resistant to leaf blight and the factors affecting disease progress

作　　者：徐秉良[1] 郁继华[1] 

机构地区：[1]甘肃农业大学植物保护系,甘肃兰州730070

出　　处：《草业学报》2003年第1期80-84,共5页Acta Prataculturae Sinica

基　　金：博士后基金项目(9309)。

摘　　要：引起兰州地区叶枯病主要致病菌为禾草离蠕孢(Bipolarissarokiniaha)。经室内采用不同方法对草坪草16个品种接种禾草离蠕孢菌的结果表明,供试紫羊茅的4个品种均较抗病,其次是草地早熟禾和黑麦草,而供试高羊茅的4个品种均较感病。高温高湿的环境利于病害的发生,温度低于10℃,感病品种病叶率平均为6.3%,温度为25℃时达59.8%;相对湿度为80%以下,病叶率很低,95%以上时,病叶率急剧上升。品种的抗病性与其叶片的结构有关,气孔数目多且蜡质层薄的品种抗病性较差,气孔数目少且蜡质层厚的品种抗病性较强。The main pathogen causing leaf blight on turf grass in Lanzhou was Bipolaris sarokiniaha. The results showed Festuca rubra was the most resistant to the disease and then Poa pratensis and Lolium perenne. Festuca arundinacea was the most susceptible to the disease. High temperature and high humidity were suitable conditions for the disease .When the temperature was below 10℃,the rate of infected leaves of susceptible varieties was 6.3%, while when the temperature increased to 25℃, 59.8% leaves were infected. When related humidity was below 80%, the rate of infected leaves were very low, while when related humidity exceeded 95%, the numbers of infected leaves increased rapidly. The variety disease resistance was related to the structures of the plant leaves.The disease resistant varieties were with less stomatas and thicker wax layer.

关 键 词：草坪草 叶枯病 发生因素 抗病性 叶片结构 病害 

分 类 号：S436.8[农业科学—农业昆虫与害虫防治] S688.4[农业科学—植物保护]