Wickerhamomyces anomalus is a species of ascomycete and teleomorphic fungi of the genus Wickerhamomyces. It is used as a preventive (biocontrol agent) for undesirable fungi or mold, nevertheless it may spoil food in large quantities. It is used in wine making, airtight stored grain (preventing Aspergillus flavus aflatoxins), apples, and grapevines. Pichia anomala has been reclassified as Wickerhamomyces anomalus.
Wickerhamomyces anomalus has high osmotolerance and ferments sucrose, and assimilates raffinose. Does not exhibit crabtree effect but rather Pasteur effect.