| 玉米弯孢菌叶斑病研究 |
| |
| 引用本文： | 戴法超.玉米弯孢菌叶斑病研究[J].植物病理学报,1998,28(2):123-129. |
| |
| 作者姓名： | 戴法超 |
| |
| 作者单位： | 1. 中国农业科学院作物品种资源研究所, 北京 100081;2. 北京市植物保护站, 北京 100029 |
| |
| 摘 要： | 玉米弯孢菌叶斑病是近年来北京、河北、河南、山东、辽宁、吉林等北方玉米产区新发生的重要病害之一。其主要病原菌为弯孢菌Curvularia lunata(Walk) Boed.,局部地区同时存在Curvularia inaequalis(Shear) Boed.,但以前者为主要。弯孢菌C.lunata生长适温为28~32℃,对pH适应范围广。玉米叶片浸汁可以促进分生孢子的萌发和芽管的生长。干燥条件下,病原菌在植株病残体上可以安全越冬,成为次年田间的初侵染源。病菌分生孢子形态为多态型,但单孢分离后代仍保持孢子的多态型,致病性无变化。病菌不同菌株间致病力有差异,强致病力菌株存在于北京及周边地区。人工接种鉴定120份玉米品种(组合)、自交系,材料间存在明显的抗性差异,抗性较好材料有农大108、中玉5号、高油115等及自交系CN95、CN165等。品种抗病性随植株生长而递减。苗期抗性较好,13叶期极为感病,因此弯孢菌叶斑病属于成株期病害。
|
| 关 键 词： | 玉米 弯孢菌叶斑病 生物学特性 致病性 品种抗性 |
CURVULARIA LEAF SPOT OF MAIZE:PATHOGENS AND VARIETAL RESISTANCE |
| |
| Dai Fachao,Wang Xiaoming,Zhu Zhendong,Gao Weidong,Huo Naxin.CURVULARIA LEAF SPOT OF MAIZE:PATHOGENS AND VARIETAL RESISTANCE[J].Acta Phytopathologica Sinica,1998,28(2):123-129. |
| |
| Authors: | Dai Fachao Wang Xiaoming Zhu Zhendong Gao Weidong Huo Naxin |
| |
| Institution: | 1. Institute of Crop Germplasm Resources, CAAS, Beijing 100081;2. Beijing Station of Plant Protection, Beijing 100029 |
| |
| Abstract: | A new leaf spot disease of maize,mainly caused by Curvularia lunata (Walk) Boed. and C.inaequalis (Shear) Boed.,is becoming prevalent in north China.The optimum temperature for growth of C.lunata is 28~32℃,and it grows well at 4~12 pH values,maize leaf extract accelerated germination of conidia and growth of germ tube.At dry condition, C.lunata successfully overwintered in diseased leaves and become primary infection sources in fields.The conidia of C.lunata are different in shape,and progenies isolated by using single spore technique are same on pathogenicity. Some isolates of C.lunata,especially isolated from Beijing are high in pathogenicity.Under artificial inoculation condition,120 maize accessions are evaluated for resistance to Curvularia leaf spot,of which,49 accessions were resistant types (HR,R and MR),and Nongda 108,Zhongyu 5,Gaoyou 115,CN95 and CN165 are high resistant.The resistance was high in seedling stage and low in adult plant. |
| |
| Keywords: | Maize Curvularia leaf spot Biological characteristics Pathogenicity Variety resistance |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《植物病理学报》浏览原始摘要信息 |
| 点击此处可从《植物病理学报》下载免费的PDF全文 |
|
