Process and conditions of noble rot

Germany are produced from similar quality grapes the highest sugar content ever measured in a TBA must was 327 °Oe, corresponding to more than 65°Brix (Dittrich and Grossmann, 2011). 

Several other varietal properties influence susceptibility to noble rot. Very thin cuticles and the compact grape clusters favor gray rot, whereas thick cuticles resist Botrytis attack (Ribereau-Gayon et ah, 2000). High stomatal number, which is variety- or even clone-dependent, favors infection by Botrytis (Pucheu-Plante and Leclair, 1990 Pulcheu-Plante and Mercier, 1983). 

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