Grechetto is one of the few Italian vines for which it is expected to wither through the Milda Nobile Botrytis Cinerea. This mould is formed only in few territories of the world and in particular: in Sauternes in the Bordeaux area (from which the very famous Sauternes with Semillon, Sauvignon Blanc and Muscadelle vines); in Hungary in the ToKaji area with Furmint vine; in Germany for the Trockenbeerenausle with the Riesling and Gewurztraminer vines.
This mould, which is formed in areas that are usually very humid, feeds on the water present in the berries, dilating the pores of the skin without breaking them and making it evaporate during the day with increasing temperatures. The wines that are obtained, wilting on the plant, are rich in glycerine, sugars and a wide and deep aromaticity. They are combined with desserts with light bitter notes, blue-veined cheeses and goose liver. The best known Grechetto Muffato is that of Orvieto even if present, in small productions, in the whole region (see image muffled bunch).