萝卜丝核菌根腐病病原鉴定及其对杀菌剂的敏感性  

Identification of Rhizoctonia Species Causing Radish Root Rot and Pathogen Sensitivity to Fungicides

作　　者：杨利娟 高苇 李海燕 薛涛 张春祥 霍建飞 王勇[1] YANG Li-juan;GAO Wei;LI Hai-yan(Institute of Plant Protection,Tianjin Academy of Agricultural Sciences,Tianjin 300192;Tianjin Agricultural Development Service Center,Tianjin 300061)

机构地区：[1]天津市农业科学院植物保护研究所,天津300192 [2]天津市农业发展服务中心,天津300061 [3]扬州大学农学院,江苏扬州225009

出　　处：《安徽农业科学》2024年第2期117-120,共4页Journal of Anhui Agricultural Sciences

基　　金：天津市农业科学院财政种业创新研究项目(2022ZYCX017)。

摘　　要：为明确萝卜丝核菌根腐病的病原种类及筛选防治丝核菌根腐病的有效杀菌剂,基于形态学、致病性测定和rDNA-ITS的序列分析,明确天津地区的萝卜丝核菌根腐病的病原为立枯丝核菌(Rhizoctonia solani),属于融合群AG-2-1。采用菌丝生长速率法评价病原对5种杀菌剂的敏感性,结果表明:病原对咯菌腈、吡唑醚菌酯、氟啶胺和噻呋酰胺均具有较高的敏感性,EC_(50)为0.0181~0.9966μg/mL,可作为生产上防治萝卜丝核菌根腐病的候选药剂使用;而病原对咪鲜胺的敏感性较差,EC_(50)为10.8828μg/mL,在生产上不推荐使用。This study aims to identify the Rhizoctonia species causing radish root rot and select efficient fungicides for controlling this disease.The pathogen of the diseased samples from Tianjin was isolated and identified as Rhizoctonia solani AG⁃2⁃1 based on morphology,pathogenicity test,and rDNA⁃ITS sequence analysis.The sensitivity of Rhizoctonia solani AG⁃2⁃1 to 5 fungicides was conducted by mycelial growth rate meth⁃od.The results indicated Rhizoctonia solani AG⁃2⁃1 was sensitive to fludioxonil,pyraclostrobin,fluazinam and thifluzamide with EC_(50)of 0.0181-0.9966μg/mL,and these four fungicides can be used as candidate agents to control radish root rot in production;while Rhizoctonia solani AG⁃2⁃1 was poorly sensitive to prochloraz with EC_(50)of 10.8828μg/mL and prochloraz was not recommend in radish production.

关 键 词：萝卜根腐病 丝核菌 杀菌剂 

分 类 号：S436.3[农业科学—农业昆虫与害虫防治]