This frequently occurring wine defect (also Bitscherl, Fasston, Muffton) is expressed by a musty smell and taste in the wine of mould and fungi. The main causes are poorly cleaned wooden barrels. Especially in older barrels, dirty pores or tartaric crusts are an ideal breeding ground for microorganisms. Contaminated barrels must be cleaned and/or disinfected by planing off the inner wall. In new barrels that have not been made wine green, the wine defect woody (acorn, tan taste, Neuerl) can occur. Both faults can be prevented by wet preservation. See also under mould taste as well as relevant keywords under barrel.
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