2011年我国主要麦区小麦白粉病菌群体对三唑酮和苯锈啶的敏感性  

Sensitivity of Blumeria graminis f.sp.tritici isolates to triadimefon and fenpropidin in China in 2011

作　　者：杨璐[1] 周益林[1] 段霞瑜[1] 曹学仁[2] 邹亚飞[1] 

机构地区：[1]中国农业科学院植物保护研究所,植物病虫害生物学国家重点实验室,北京100193 [2]中国热带农业科学院环境与植物保护研究所,海口571101

出　　处：《植物病理学报》2013年第4期430-434,共5页Acta Phytopathologica Sinica

基　　金：国家重点基础研究发展计划项目(2013CB127700);国家科技支撑计划项目(2012BAD19B04);公益性行业科研专项(201303016)

摘　　要：小麦白粉病（WheatPowderyMildew）是我国小麦生产上常发性病害之一。小麦白粉病的防治主要采用抗病品种和化学药剂，辅之以栽培措施的综合防治技术。由于目前生产上抗病品种相对缺乏，药剂防治成为我国小麦白粉病防治的主要措施之一。自20世纪80年代以来三唑类杀菌剂一直是我国防治小麦白粉病的主要药剂，由于长期、大范围、单一的使用导致小麦白粉病菌对三唑类杀菌剂的抗药性大大提高。The sensitivity of 100 isolates of Blumeria grarninis f. sp. tritici sampled from eight provinces or cities to triadimefon and fenpropidin was tested by seed treatment and detached leaf segment methods. The re- suits showed that the mean EC50 of all the tested isolates to triadimefon was 47.27 mg/L, and the mean resis- tance factor （RF） was 22.62. The frequency of resistant isolates to triadimefon reached 97.00%. The resistance factor of the tested isolates from Shandong to triadimefon was the highest, reached 52.63. The base-line of sen- sitivity of B. graminis f. sp. tritici to fenpropidin was 100.47 mg/L. There was no significant cross-resistance between triadimefon and fenpropidin in B. graminis f. sp. tritici population. These results will provide the refe- rence for fungicide resistant management and the rational use of fungicides.

关 键 词：小麦白粉病菌 敏感性 三唑酮 菌群体 综合防治技术 三唑类杀菌剂 麦区 小麦生产 

分 类 号：S435.121.4[农业科学—农业昆虫与害虫防治]