Intact bunches of freshly harvested grapes were weighed into four replicates of 40 kg. Winemaking process, itemised in Fig. 1, was identical for all vinification experiments, as it was commented
above. Briefly, each grape sample were crushed and destemmed,introduced into independent metallic vessels of fermentation and supplied with SO2 (40 mg/L) and the fungicide (only for experiment B). After 24 h, commercial yeast (S. cerevisiae) was added.