(boh-TRI-tihs): The â€˜Noble Rotâ€™ - a beneficial kind of mould or fungus that may appear on late-harvested grapes, causing them to shrink and dry so the natural sugars become highly concentrated.
A grey mould or fungus which affects plants in humid conditions.
Noble Rot. A fungus that shrivels the grapes and concentrates the sugar content. Under controlled conditions this can result in a very pleasant wine. Sauternes are vastly improved when made with this sort of grape.