番茄晚疫病菌对甲霜灵的抗性  

The resistance of Phytophthora infestans isolates to metalaxyl

作　　者：杨宇红[1] 冯兰香[1] 谢丙炎[1] 冯东昕[1] 

机构地区：[1]中国农业科学院蔬菜花卉研究所,北京100081

出　　处：《植物保护学报》2003年第1期57-62,共6页Journal of Plant Protection

基　　金：ARC-AVRDC(亚洲蔬菜研究与发展中心的亚区域中心)资助

摘　　要：为了掌握我国番茄晚疫病菌对甲霜灵抗性的发生和分布状况,1999～2001年,陆续从全国16个省市的主要番茄产区采集晚疫病样本400余个,分离、纯化出番茄晚疫病菌株183个;采取离体和活体生测法对所有菌株进行了抗甲霜灵的测定。结果表明:我国番茄晚疫病菌对甲霜灵的抗性由北向南逐渐增强,北方地区以中等抗性菌株和敏感性菌株为主,南方地区则以抗性菌株和中等抗性菌株为主。其中东北、西北地区无抗性菌株,中抗和敏感菌株分别为33.3％、66.7％和36.1％、63.9％;华北、华东地区抗性、中抗和敏感菌株分别为5.6％、44.4％、50.0％和38.6％、36.8％、4.6％;华中和西南地区抗性菌株分别占55.6％和44.2％,中抗和敏感菌株则各占33.3％、26.8％和11.1％、18.8％;华南地区无敏感菌株,抗性菌株达66.7％,中抗菌株为33.3％。In order to investigate the occurrence and distribution of resistance of Phytophthora in-festans isolates to metalaxyl in China, over 400 samples of tomato late blight were collected in major tomato production areas among 16 provinces and cities during 1999-2001. From these samples 183 strains of Phytophthora infestans were isolated and purified. And their resistance to metalaxyl in vitro and in vivo was characterized. The results show that the proportion of metalaxyl-resistant isolates has a significant increase from north to south. In the northern areas, the predominant distribution is the isolates of metalaxyl-sensitive (MS) and -intermediate (MI), whereas in the southern areas, the predominant isolates show metalaxyl-resistant (MR) and MI. There is no isolates showing MR in northeast China and northwest China among our samples, and the proportion of MI or MS ( % of total) is 33.3% , 66.7% and 36.1 % , 63.9% respectively in these two areas. The distribution percentage of MR, MI or MS is 5.6% ,44.4% ,50.0% and 38.6% ,36.8% ,4.6% in north China and east China, respectively. However, 55.6%@@33.3%@@@11.1% in central China, and 44.2%, 26.8%,18.8% in southwest China respectively. High proportions of MR (66.7%) were found in south China, 33.3% were intermediate in response, but no sensitive isolates were collected.

关 键 词：番茄 晚疫病菌 甲霜灵 抗性 晚疫病 

分 类 号：S481[农业科学—农药学]