戊唑醇对2种辣椒炭疽菌的敏感性差异

The Sensitivity Difference of Tebuconazole against Colletotrichum scovillei and Colletotrichum truncatum

为明确戊唑醇对2种辣椒炭疽菌的敏感性差异,通过菌丝生长速率法测定了戊唑醇对2种辣椒炭疽菌的室内抑菌效果。结果表明,戊唑醇对5株不同地点平头炭疽菌的EC 50值分别为187.1574、22.1894、82.0575、54.5379和28.3635μg/mL,对3株不同地点的斯高威尔炭疽菌的EC 50值分别为0.2980、0.3404和0.2404μg/mL。戊唑醇对斯高威尔炭疽菌敏感而对平头炭疽菌表现为不敏感。准确鉴定出辣椒炭疽病病原种类,筛选出对病原菌敏感的化学药剂,为进一步科学防治辣椒炭疽病提供理论依据。

In order to define the inhibitory effect of tebuconazole against C.scovillei and C.truncatum,tebuconazole against the pathogen by the method of mycelium growth rate in the laboratary were determined.The results indicated that EC 50 of tebuconazole against the growth of mycelium of five C.truncatum strains were 187.1574,22.1894,82.0575,54.5379 and 28.3635μg/mL respectively,but tebuconazole had good inhibitory effect on the growth of mycelium of three C.scovillei strains,which EC 50 were 0.2980、0.3404 and 0.2404μg/mL respectively.Therefore,tebuconazole was sensitive to C.scovillei,but was not sensitive to C.truncatum.The species of the pathogen of pepper anthracnose should be identified and effective fungicides against the disease should be screened,and it could provide theoretical basis for controlling the disease.