Influence of the harvesting date on quality of the must and wine of Garanoir grape | Influence de la date de vendange sur la qualite des vins de Garanoir
Spring, J.-L.(Agroscope RAC Changins, Station federale de recherches agronomiques, Pully (Switzerland). Centre viticole du Caudoz)
The influence of the harvesting date on must and wine quality has been studied from 1999 to 2002 on the cultivar Garanoir at Agroscope RAC Changins in Nyon (VD). The experiments were designed to compare two harvesting times: when the sugar of the grapes reached 88-90 °Oe and two or three weeks later, about ten days after the harvest of the reference cultivar Gamay. The must of late harvested grapes had a lower content in tartaric acid. As it was found for Gamaret, later harvested Garanoir wines were more coloured and had a higher content in phenolic compoundsthey were always preferred in wine testing with their better structure and their tannins of better quality.
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