Meteorological conditions determine the thermal-temporal position of the annual Botrytis bunch rot epidemic on <em>Vitis vinifera</em> L. cv. Riesling grapes [* Cross-Reference *]

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Daniel Molitor; Ottmar Baus; Lucien Hoffmann; Marco Beyer, 2026, "Meteorological conditions determine the thermal-temporal position of the annual Botrytis bunch rot epidemic on <em>Vitis vinifera</em> L. cv. Riesling grapes [* Cross-Reference *]", https://lore.list.lu/citation?persistentId=perma:LIST.JW3WXP, LIST Open Repository, V1
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<p style="text-align: justify;"><strong>Aims</strong>:</p><p class="Tabelle" style="text-align: justify;">Under Central European climatic conditions, bunch rot caused by <em>Botrytis cinerea</em> occurs virtually every season on <em>Vitis vinifera</em> L. cv. Riesling grapes. Statistical investigations based on at least three annual disease severity assessments in 7 seasons (2007-2013) aimed at (i) simulating the disease progress and (ii) identifying meteorological conditions with predictive value for epidemics.</p><p class="Tabelle" style="text-align: justify;"><strong>Methods and results</strong>:</p><p class="Tabelle" style="text-align: justify;">Sigmoidal regression models were used to describe the disease progress as function of thermal time. Coefficients of determination were &gt; 0.97. The thermal time adjusted pace of the epidemic was almost constant in all seasons while the point of time when 5% disease severity was reached varied among years. Window pane analyses showed that relatively low temperatures and wet conditions during bloom as well as relatively high temperatures and low precipitation sums around/after veraison were associated with thermal-temporally late epidemics.</p><p class="Tabelle" style="text-align: justify;"><strong>Conclusions</strong>:</p><p class="Tabelle" style="text-align: justify;">Environmental conditions determine the timing of annual bunch rot epidemics. Analyses indicate a strong link between meteorological conditions around grape bloom (probably affecting fruit set and cluster structure) and the predisposition of the grape clusters to bunch rot.</p><p class="Tabelle" style="text-align: justify;"><strong>Significance and impact of the study</strong>:</p><p class="Tabelle" style="text-align: justify;">The enhanced understanding of the effect of environmental conditions on the bunch rot epidemics supports growers to optimize control measures and is supposed to result in a Botrytis bunch rot model.</p> (2016-09-26)
***This entry has been automatically imported via OpenAlex by LIST harvest scripts. Please refer to https://doi.org/10.20870/oeno-one.2016.50.3.36 for the original and latest version of the publication*** (2026-07-01)
Subject Agricultural Sciences; Arts and Humanities; Chemistry; Earth and Environmental Sciences; Medicine, Health and Life Sciences; Physics
Keyword Horticulture, Vitis vinifera, Botrytis cinerea, Mathematics, Biology
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