Lalvin QA23™

(Saccharomyces cerevisiae bayanus)

QA23 was selected in Portugal by the University of Tras os Montes e Alto Douro (UTAD) in cooperation with the Viticultural Commission of the Vinhos Verdes region. Suited for production of fresh, fruit-focussed, clean white wines, maximises varietal concentration and expression. Produces glucosidase, which allows the release of bound terpenes when present in the must resulting in more fruity varietal aromas. Relative to other yeast strains, QA23 has low nutrient and oxygen requirements, and will ferment juice with low turbidity at low temperatures (10°C) to dryness. This yeast can ferment down to 10 degrees once the fermentation has started and there are no other limiting conditions. A cool climate winner.

Selected by Selected by the University of Tras o Montes e Alto Douro - Portugal