The influence of meteorological events and cultural practices on sclerotinia crown and stem rot of alfalfa, caused by Sclerotinia trifoliorum

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dc.contributor.authorReed, Karen L.en
dc.contributor.committeechairStromberg, Erik L.en
dc.contributor.committeememberVanScoyoc, S. W.en
dc.contributor.committeememberPhipps, Patrick M.en
dc.contributor.departmentPlant Pathology, Physiology, and Weed Scienceen
dc.date.accessioned2014-03-14T21:41:08Zen
dc.date.adate2012-07-24en
dc.date.available2014-03-14T21:41:08Zen
dc.date.issued1987-01-05en
dc.date.rdate2012-07-24en
dc.date.sdate2012-07-24en
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
dc.description.degreeMaster of Scienceen
dc.format.extentix, 96 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-07242012-040058en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-07242012-040058/en
dc.identifier.urihttp://hdl.handle.net/10919/43891en
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1987.R44.pdfen
dc.relation.isformatofOCLC# 16665684en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1987.R44en
dc.subject.lcshAlfalfaen
dc.subject.lcshApotheciumen
dc.subject.lcshSclerotiniaen
dc.titleThe influence of meteorological events and cultural practices on sclerotinia crown and stem rot of alfalfa, caused by Sclerotinia trifoliorumen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplinePlant Pathology, Physiology, and Weed Scienceen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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