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dc.contributor.authorReed, Karen L.en_US
dc.date.accessioned2014-03-14T21:41:08Z
dc.date.available2014-03-14T21:41:08Z
dc.date.issued1987-01-05en_US
dc.identifier.otheretd-07242012-040058en_US
dc.identifier.urihttp://hdl.handle.net/10919/43891
dc.description.abstractSclerotinia crown and stem rot (SCSR), caused by Sclerotinia trifoliorum Eriks., causes serious spring losses in some fall=sown, no-tillage alfalfa fields. In microplots artificially infested with sclerotia, greatest numbers of apothecia were found during November and December. Temperature and rainfall had significant impact on apothecium development. A proposed prediction method for apothecium appearance considers monitoring mean soil temperature. For apothecium initiation to occur, it was necessary for sclerotia to be subjected to an estimated 17 days of temperature at or below 15 C before apothecium production occurred. Soil temperatures were usually below 10 C at the time of apothecium appearance. Greatest numbers of apothecia occurred between 5-10 C. Rainfall influenced the number of apothecia, with significant increases occurring early in the 1984-85 production period.en_US
dc.format.mediumBTDen_US
dc.publisherVirginia Techen_US
dc.relation.haspartLD5655.V855_1987.R44.pdfen_US
dc.subjectAlfalfaen_US
dc.subject.lccLD5655.V855 1987.R44en_US
dc.titleThe influence of meteorological events and cultural practices on sclerotinia crown and stem rot of alfalfa, caused by Sclerotinia trifoliorum.en_US
dc.typeThesisen_US
dc.contributor.departmentPlant Pathology, Physiology, and Weed Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
dc.contributor.committeechairStromberg, Erik L.en_US
dc.contributor.committeememberVanScoyoc, S. W.en_US
dc.contributor.committeememberPhipps, Patrick M.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07242012-040058/en_US
dc.date.sdate2012-07-24en_US
dc.date.rdate2012-07-24
dc.date.adate2012-07-24en_US


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