The influence of meteorological events and cultural practices on sclerotinia crown and stem rot of alfalfa, caused by Sclerotinia trifoliorum
Sclerotinia 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 r...
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ndltd-VTETD-oai-vtechworks.lib.vt.edu-10919-438912021-05-05T05:40:20Z The influence of meteorological events and cultural practices on sclerotinia crown and stem rot of alfalfa, caused by Sclerotinia trifoliorum Reed, Karen L. Plant Pathology, Physiology, and Weed Science Stromberg, Erik L. VanScoyoc, S. W. Phipps, Patrick M. LD5655.V855 1987.R44 Alfalfa Apothecium Sclerotinia Sclerotinia 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. Master of Science 2014-03-14T21:41:08Z 2014-03-14T21:41:08Z 1987-01-05 2012-07-24 2012-07-24 2012-07-24 Thesis Text etd-07242012-040058 http://hdl.handle.net/10919/43891 http://scholar.lib.vt.edu/theses/available/etd-07242012-040058/ OCLC# 16665684 LD5655.V855_1987.R44.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ ix, 96 leaves BTD application/pdf application/pdf Virginia Tech |
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LD5655.V855 1987.R44 Alfalfa Apothecium Sclerotinia |
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LD5655.V855 1987.R44 Alfalfa Apothecium Sclerotinia Reed, Karen L. The influence of meteorological events and cultural practices on sclerotinia crown and stem rot of alfalfa, caused by Sclerotinia trifoliorum |
description |
Sclerotinia 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. === Master of Science |
author2 |
Plant Pathology, Physiology, and Weed Science |
author_facet |
Plant Pathology, Physiology, and Weed Science Reed, Karen L. |
author |
Reed, Karen L. |
author_sort |
Reed, Karen L. |
title |
The influence of meteorological events and cultural practices on sclerotinia crown and stem rot of alfalfa, caused by Sclerotinia trifoliorum |
title_short |
The influence of meteorological events and cultural practices on sclerotinia crown and stem rot of alfalfa, caused by Sclerotinia trifoliorum |
title_full |
The influence of meteorological events and cultural practices on sclerotinia crown and stem rot of alfalfa, caused by Sclerotinia trifoliorum |
title_fullStr |
The influence of meteorological events and cultural practices on sclerotinia crown and stem rot of alfalfa, caused by Sclerotinia trifoliorum |
title_full_unstemmed |
The influence of meteorological events and cultural practices on sclerotinia crown and stem rot of alfalfa, caused by Sclerotinia trifoliorum |
title_sort |
influence of meteorological events and cultural practices on sclerotinia crown and stem rot of alfalfa, caused by sclerotinia trifoliorum |
publisher |
Virginia Tech |
publishDate |
2014 |
url |
http://hdl.handle.net/10919/43891 http://scholar.lib.vt.edu/theses/available/etd-07242012-040058/ |
work_keys_str_mv |
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