马铃薯晚疫病菌对瑞毒霉与霜脲氰的交互抗性  

Cross Resistance of Phytophthora infestans Isolates to Metalaxyl and Cymoxanil

作　　者：王晨[1] 张铉哲[1] 刘铁男[1] 李新新[1] 解明静[1] 陈聪[1] 

机构地区：[1]东北农业大学农学院,哈尔滨黑龙江150030

出　　处：《中国马铃薯》2012年第2期100-104,共5页Chinese Potato Journal

基　　金：哈尔滨市科技攻关计划项目(20111AA613BN072-1);教育部留学回国人员科研启动基金(210150)

摘　　要：2008-2011年在黑龙江省共分离了41个马铃薯晚疫病菌,并测定了这些菌株对瑞毒霉和霜脲氰的敏感性和交互抗性。瑞毒霉测定结果显示6个（14.63%）菌株显示为敏感性,11个（26.83%）菌株显示为中抗,24个（58.54%）菌株显示为抗性。这说明黑龙江省分离的晚疫病菌已对瑞毒霉产生抗性。对于霜脲氰,EC50值为0.0630~2.1289μg/mL,最不敏感菌株是最敏感菌株的33.79倍,敏感性基线值为0.1879μg/mL。交互抗性分析结果显示,未产生交互抗性的菌株为73.16%,产生交互抗性菌株为26.84%。以上结果说明霜脲氰和瑞毒霉不能交叉使用。A total of 41 Phytophthora infestans isolates were isolated from Heilongjiang Province, and determined for the sensitivity and cross resistance of these isolates to metalaxyl and cymoxanil. As for metalaxyl resistance, six （14.63%） isolates were sensitive, 24 （58.54%）isolates were intermediate resistant, and 24 （58.54%） isolates were resistant. The results suggested that P. infestans isolates collected from Heilongjiang Province have occurred the resistance to metalaxyl. As for cymoxanil, EC50 values ranged from 0.0630 to 2.1289 μg / mL, with EC50 values of the most insensitive isolate being 33.79 times the most sensitive, and the value of base line sensitivity was 0.1879 μg / mL. The results of cross resistance indicated that no cross resistant isolates was 73.16%, and cross resistant isolates was 26.84%. The above results suggested that cymoxanil could not be cross used with metalaxyl.

关 键 词：马铃薯晚疫病菌 瑞毒霉 霜脲氰 敏感性 交互抗性 

分 类 号：S435.32[农业科学—农业昆虫与害虫防治]