It’s very possible this mold bloom was caused by a change in the weather or a change in your cellar environment.
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Oxygen Ingression, Volatile Acidity Interventions, Sorbate Question, and Malolactic Timing
Sometimes we get several questions that revolve around a similar theme. The Wine Wizard had several questions this go-round on volatile acidity and malolactic fermentation. She provides some specifics for winemakers who have bigger picture problems on their hands.
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Dumping your pomace and finding the grapes still juice-laden after pressing is frustrating. The Wizard has some pointers for getting the most from your grapes as well as baking bread with wine yeast and the concerns of light strike on your wines.