玉米交链孢叶枯病病原菌鉴定及生物学特性  

A Distinguished on Maize Leaf Sspot Caused by Alternaria Tenuis Nees and Study on Biological Characteristics of the Pathogen

作　　者：张定法[1] 张希福[1] 郎剑锋[1] 朱盛安 

机构地区：[1]河南科技学院植物保护系,河南新乡453003 [2]河南省新乡市农业局,河南新乡453003

出　　处：《安徽农业科学》2006年第10期2057-2058,共2页Journal of Anhui Agricultural Sciences

基　　金：国家粮食丰产科技工程河南专题部分研究内容(2004BA520A06-11)

摘　　要：对玉米交链孢叶枯病的病原、症状、生物学特性等进行了初步研究。结果表明:该病的病原菌为细交链孢叶枯病菌(Alternariatenuis Nees)。主要危害叶片,病斑椭圆形或近圆形,中央灰白色至枯白色,边缘红褐色。病菌生长的温度范围为5～35℃,适宜温度为25～30℃;分生孢子产生和萌发的温度范围分别为10～35℃和8～40℃,适宜温度分别为15～30℃和20～30℃;病菌生长和孢子萌发的pH值范围均为3～10,最适pH值均为8。分生孢子萌发要求95%以上的空气相对湿度。紫外光对分生孢子的杀灭作用较弱。In the paper the pathogen, symptom and biological characteristics of maize leaf spot were studied. The tesults showed that the pathogen was A hernaria tenuis Nees it mainly invaded leaf. The disease was elliptic .In the central of the disease was gray-white to white, in the marginal was red-brown. The pathoge ofA hernaria tenuis Noes could grow under the temperature from 5-35℃, and optimal temperature was 25- 30℃.The temperature of the spore production and germination were 10-35 ℃and 8-40 ℃ ,optimal temperature were 15-30 and 20-30℃.The range of pH value about mycelium growth and spore germination were 3- 10, the optimum pH value of the both were 8.The spore production and germination needed relative humidity over 95 %. The ultraviolet light was the weakest toxic for spores,

关 键 词：玉米 交链孢叶枯病 病原菌 症状 生物学特性 

分 类 号：S435.13[农业科学—农业昆虫与害虫防治]