Term for the one to two centimeters thick, gray-green to black mold with the botanical name Zasmidium cellare or obsolete Cladosporium cellare. Other names after the fur-like or cloth-like appearance or after the nature are cellar cat (dialect in Austria "Köllakotz") or black cat as well as cellar cloth (picture on the right). The mold forms especially in wine cellars with stock of wooden barrels and very high humidity over 80% on walls, bottles and barrels. However, it is not tolerated on the latter, because it will attack or negatively affect the wood.
The cellar mold feeds on the volatile substances of the wine like alcohol. acetic acid and ester, The need for nitrogen and sulfur vapors of carbon disulfide, hydrogen sulfide and sulphurous acid educated. In contrast to other types of mold, no unpleasant odors are formed. By regulating the air humidity it is very desirable and the presence indicates optimal conditions. The "real" has a completely different meaning basement cat, who used to like to stay in cellars because of the mice. See also under Customs in viticulture,