Commercial Winemaking Production Series: Treatment of Film Yeasts

Wild yeasts on the surface of wines in tanks and barrels can generate an off-aroma, and this three-page publication gives advice on how to avoid them. The No. 1 preventative is to keep tanks and barrels full, so there is no airspace. It also helps to filter the air in the wine cellar and to add proper amounts of sulfur dioxide to the wine.