•RESEARCHREPORTS•doi:10.16801/j.issn.1008-7303.2022.0117BioactivitiesoffivefungicidesagainstRhizoctoniasolani,thecausalagentoftobaccosoreshinXIANGLigang1,WANGHancheng*,2,CAILiuti2,LUNing2,CHENXingjiang2,YUZhihe3(1.CollegeofAgriculture,YangtzeUniversity,Jingzhou434025,HubeiProvince,China;2.GuizhouAcademyofTobaccoScience,Guiyang550081,China;3.CollegeofLifeScience,YangtzeUniversity,Jingzhou434025,HubeiProvince,China)Abstract:TobaccosoreshincausedbyRhizoctoniasolaniisoneofthemostdestructivediseasesintheseedbedsufferedbytobaccoinChina.Thisstudyevaluatedtheactivitiesofthefungicidesazoxystrobin,boscalid,fluazinam,propiconazole,andpyrimethanilagainstmycelialgrowth,sclerotiaformationandgerminationofR.solani,andalsotheirprotectiveandcurativeefficaciesagainsttobaccosoreshin.ThemycelialgrowthofR.solaniwasmoresensitivetofluazinamandazoxystrobinthantopropiconazoleandboscalid,andleastsensitivetopyrimethanil.Azoxystrobinshowedstrongerinhibitionofsclerotiaproductionthanpropiconazole,fluazinam,pyrimethanil,andboscalid.NoneofthefivefungicidesinhibitedthesclerotiagerminationofR.solani.Intermsoftheprotectiveactivityofdetachedtobaccoleaves,azoxystrobinandboscalidat12.5and50mg/Lweresuperiortofluazinam,propiconazole,andpyrimethanilinreducingsoreshin.Forcurativeactivity,azoxystrobinat50and200mg/Lwassuperiortotheotherfourfungicidesinreducingdisease.Therefore,amongthefivefungicides,azoxystrobinismostsuitableforthecontroloftobaccosoreshin.Keywords:Rhizoctoniasolani;azoxystrobin;sensitivity;sclerotiumproduction;controlefficacy五种杀菌剂对烟草立枯病菌的生物活性向立刚1,汪汉成*,2,蔡刘体2,陆宁2,陈兴江2,余知和3(1.长江大学农学院，湖北荆州434025；2.贵州省烟草科学研究院，贵阳550081；3.长江大学生命科学学院，湖北荆州434025)摘要：由立枯病丝核菌引起的烟草立枯病是我国烟草苗床上危害最严重的病害之一。本研究评价了5种杀菌剂(嘧菌酯、啶酰菌胺、氟啶胺、丙环唑和嘧霉胺)对立枯丝核菌菌丝生长、菌核形成和萌发的影响，以及其对烟草立枯病的防治效果。结果表明：立枯丝核菌菌丝对氟啶胺和嘧菌酯的敏感性高于丙环唑和啶酰菌胺，...
