Managing oxidative risk

Throughout winemaking, several steps are known as strategic key points where oxidation mechanisms can occur: transport of grapes, at pressing, stabulation, racking, at the beginning of AF, during cold stabilization, storage and transport. This Winemaking Update will focus on biological tools available to winemakers to control oxidation prior to the onset of alcoholic fermentation, more specifically on how the specific yeast derivative, Glutastar™ can support the process of managing oxidation in white and rosé wines in a strategy to reduce chemical intrant such as SO2. WUP - Oxidation - Glutastar ENG

Managing Oxidative Risk

We have seen in Part I of Managing oxidative risk with biological tools how to fight #oxidation in must with specific inactivated #yeast, such as Glutastar™, during pre-fermentation stages. But there are also sensitive stages post fermentation, where #wine needs to be protected from oxidation.   📝 A research conducted by the INRAE, under the supervision of SALMON JM showed the potential of specific inactivated yeasts to consume oxygen and protect wine from oxidation. One of the tested SIYs particularly stood out for its outstanding ability to scavenge oxygen. And it is now made available to #winemakers: PURE-LEES LONGEVITY.   Winery scale trials demonstrated that using PURE-LEES LONGEVITY at the most sensitive post-fermentation stages enables to protect the wine against oxidation while reducing SO₂ additions.   🍷 PURE-LEES LONGEVITY is an essential tool to control wine oxidation post-fermentation and can be part of an overall #bioprotection strategy to preserve wine #aromas and color, and confer a longer shelf life and a better market value to your wine.   Discover all the results in our Winemaking Update Part II 👉 WUP - Oxidation - Pure-Lees ENG

In 2006, the world production of rosé wines was estimated at 21.5 million hL – 9% of the total world production of wine (Aigrain 2009). Production has been increasing for several years. In the United Kingdom, for example the main sellers are rosé wines from the United States – almost half of the total wines sold in supermarkets. From a technical point of view, the production of rosé wine involves particular considerations as rosé is mid-way between white wine (avoiding the extraction of phenolic compounds at the tannin level) and red wine (involving potential problems with colour extraction and structure). When short maceration times are used in the production of high quality rosé wines, the wines can be fragile and evolve rapidly. One of the most frequent developments is the appearance of premature lactic and creamy aromas that can override the fruity aromas in the nose and the refreshing sensation in retronasal perception. Download PDF