Zymocidal
yeast contaminants are implicated as one of the
causes of sluggish or stuck fermentations, but they
are also promoted for inhibiting the proliferation of
unwanted yeast contaminants. However, their ef®-
cacy under winemaking conditions has yet to be
demonstrated. Furthermore, zymocins produced by
S. cerevisiae are lethal only to sensitive strains of
S. cerevisiae, whereas those produced by non-
Saccharomyces species may be toxic to S. cerevisiae
as well as non-Saccharomyces species