河南省玉米病害的发生特点和主推品种的田间抗性鉴定

以19个河南主推玉米品种为材料，连续2年分别在豫西南、豫中南、豫东、豫中、豫北进行抗病性评价试验。结果表明，河南省玉米区主要病害有褐斑病、南方锈病和弯孢叶斑病，其中褐斑病在豫东发病最重，豫北、豫中和豫中南发病较轻，豫西南基本不发病；南方锈病在豫西南发病最重，豫中南、豫东和豫中中度偏重发生，豫北发病较轻；弯孢叶斑病在豫中南发病最重，豫西南、豫东、豫中中度发病，豫北发病较轻。

The Incidence of Corn Diseases and the Main Features of Field Push-resistant Identification of Species in Henan Province

State-trial test for 19 corn varieties,respectively,at the south of Henan province,Yuzhongnan,Yudong,Yuzhong,Yubei,carried out eight corn varieties resistant disease investigation and evaluation.Experiments show that there were three main diseases in Henan province. Physoderma brown spot,Yudong incidence of the most serious,Yudong and Yubei,Yuzhong,Yuzhongnan was extremely significant,basic non-incidence of south of Henan province. Southern corn rust that the most serious incidence of south of Henan province,Yuzhongnan,Yudong,Yzhong occurred more moderate,less incidence Yubei.Curvularia leaf spot,the most serious incidence of Yuzhongnan,Yunan,Yudong,Yuzhong,Yubei a lesser incidence.