Winemaking techniques: Co-inoculation of yeasts and bacteria – Discover the Best Wines

The co-inoculation with exogenous yeasts and bacteria  is an advanced winemaking technique that makes it possible to manage alcoholic fermentation and malolactic fermentation at the same time. This method, used in particular for structured, complex red wines, guarantees efficiency, microbiological control and greater aromatic expression.What is Co-inoculation? The co-inoculation involves the simultaneous introduction of selected yeasts, responsible for alcoholic fermentation, and of exogenous lactic bacteria, which convert malic acid into lactic acid (malolactic fermentation). This process makes it possible to optimise time and resources, ensuring greater control over microbiological parameters. Benefits of Co-inoculationMicrobiological control: It reduces the risk of contamination by unwanted micro-organisms. Optimising timings: The two fermentations run in parallel, shortening the overall process. Aromatic balance: It encourages a harmonious taste profile, with softer tannins and a reduction in aggressive acidity.Stages of the Process 1. Preparing the Must After the grapes have been pressed, the must is transferred to the tanks, with temperature monitoring to ensure ideal conditions for yeasts and bacteria. 2. Simultaneous InoculationSelected yeasts: They start alcoholic fermentation, turning the sugars into alcohol and CO₂. Exogenous lactic bacteria: At the same time, they begin to convert malic acid into lactic acid.3. Fermentation Controlled temperature makes it possible to:Efficient work by the yeasts and bacteria. Preservation of the fruity aromas and of freshness. Development of soft tannins in red wines.4. Stabilisation Once the fermentations are complete, the wine is racked to remove the coarse lees and moved on to ageing.Characteristics of the Wines Produced ColourIn the reds: Intense ruby red, with purple highlights in young wines. In structured whites: Golden yellow, with marked brightness.AromasFruit: Blackcurrant, cherry, blackberry (in the reds); citrus and tropical fruit (in the whites). Lactic notes: Yoghurt, butter (thanks to malolactic fermentation). Spices and toast: Where the wine is later aged in wood.PalateSoft and enveloping, thanks to the reduction of malic acidity. Structured and balanced, with polished tannins in the reds. Finish long and harmonious, with a good balance between freshness and complexity.Ideal Grape Varieties for Co-inoculation Black Grape VarietiesCabernet Sauvignon: Structured, with refined tannins and aromas of dark fruit. Merlot: Soft and fruity, with a velvety texture. Syrah: Spicy and complex, with notes of black pepper and berries.White Grape VarietiesChardonnay: Structured and creamy, with notes of butter and tropical fruit. Viognier: Aromatic and full-bodied, with hints of peach and apricot.Benefits of Co-inoculation with Exogenous Yeasts and Bacteria 1. Time Saving The two fermentations take place at the same time, reducing the overall length of the process. 2. Control and Precision Managing yeasts and bacteria makes it possible to avoid microbiological faults and to achieve the desired aromatic profile. 3. Greater Aromatic Complexity Co-inoculation favours a harmonious integration of fruity, lactic and spicy notes.Food Pairings Wines made with co-inoculation pair with rich, structured dishes, thanks to their softness and complexity. Red WinesGrilled red meat or braised. Game, such as wild boar and venison. Aged cheeses and blue cheeses.Structured White WinesBaked fish or in a salt crust. Creamy first courses, such as risotto and pasta with truffle. Medium-aged cheeses.Why Choose a Wine Fermented with Co-inoculation? A wine produced with co-inoculation with exogenous yeasts and bacteria offers a perfect balance between structure, softness and freshness. This technique guarantees precision and a rich aromatic profile, ideal for anyone looking for wines of great personality and quality.