小麦叶枯病病原菌及发病动态研究

A Study on the Pathogen and Disease occurance Trend of Wheat Leaf Blight

辉县地区小麦叶枯病症状有急性型、普通型两种类型；病原菌为细交链孢（ＡｔｅｒｎａｒｉａｔｅｎｎｉｓＮｅｅｓ）和麦类很腐德氏霉（ＤｒｅｃｈｓｌｅｒａｓｏｒｏＲｉｎａｎａ（Ｓａｃｃ）ＳｕｂｒａｍＪａｉｎ）．小麦叶枯病在拨节后始发，孕穗缓慢发展，抽穗期发展迅速，灌浆期达发病高峰。小麦孕穗期为药剂防治关键时期。小麦品种对叶枯病抗性有显著差异，生产上应将利用抗病品种作为防治的重要措施。产量损失测定结果表明，叶枯病已成为小麦重大病害。

The wheat leaf blight of Hut Xian Country has two kinds of symptom,which include emergency type and common type.It is Occured by Alternaria tennis Nces and Drechslera sororinana (Sacc)Subram& Jain.The diseasa starts in stem pushing stage,develops betweenbooting stage and come into ear stage,and reaches peak in filling stage,The key term of farm chemical control is in booting stage.The disease-resistance among wheat varieties exists notable divergence,so making use of disease resistant varieties is a very improtant measure of the control in practice.