陕西省苹果黑星病菌的致病力分化研究  

Studies on Pathogenicity Differentiation of Venturia inaequalis of Apple in Shaanxi

作　　者：梁振宇[1] 胡小平[1] 杨家荣[1] 郭世保[1] 

机构地区：[1]西北农林科技大学植保资源与病虫害治理教育部重点实验室,陕西杨凌712100

出　　处：《西北农业学报》2006年第4期76-79,共4页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：欧盟科技合作项目(ICA4-CT-2001-10001);西北农林科技大学优秀人才项目(04ZR018)资助

摘　　要：选用陕西省18个有代表性的苹果黑星病菌菌株分别接种秦冠、富士、嘎啦、红星和乔纳金等5个寄主品种进行致病力测定。结果表明,不同菌株在相同寄主上能产生不同类型的病斑,其大小、形状、颜色存在较大差异。根据寄主对病菌的反应类型并结合病害严重度聚类分析结果,可将18个菌株划分为:强致病力Ⅰ型;中等致病力Ⅱ型和弱致病力Ⅲ型。Five apple cultivars were individually inoculated with 18 representative single spore isolates of Venturia inaequalis collected from main apple grown areas in Shaanxi province. Results showed that there was obvious difference in pathogenicity among those testing isolates that could produce different types of disease spots in their size, shape and color on the same inoculation host. Based on the host reaction and cluster analysis of disease severity, the isolates could be divided into three categories： strong（pathotype Ⅰ） ,intermediate（pathotype Ⅱ） and weak pathogenicity （pathotype Ⅲ）respectively.

关 键 词：苹果黑星病菌 反应型 致病力分化 陕西 

分 类 号：S436.611[农业科学—农业昆虫与害虫防治]