Botrytis cinerea, when it develops in a particular form named “noble rot” is at the origin of the great sweet white wines of Sauternes, from the Semillon grape variety.
- STAGE 1 : Golden grapes
- STAGE 2 : Fungus installation, the botrytis cinerea
- STAGE 3 : Full rotten
- STAGE 4 : Roasted rotten
Moreover, Botrytis cinerea colonises the grapes in a heterogeneous way. Thus, a single grape can present all stages of evolution of the fungus : berries at maturity, full rotten and roasted rotten.
It is this parameter wich requires a strictly manual harvest by successive passages (selections) to collect only those parts of the grapes affected by the fungus.