Alcohol isn't good for your plants and the yeast will consume the sugars and continue to thrive as long as they have food. (sugar) Don't add any sugars and it will go away. Problem is, plants like sugars. Now your plant is competing with the yeast for sugar.
Wikipedia:
See also: Mating of yeast Yeasts have
asexual and
sexual reproductive cycles; however the most common mode of vegetative growth in yeast is
asexual reproduction by
budding or
fission.
[16] Here a small bud, or daughter cell, is formed on the parent cell. The
nucleus of the parent cell splits into a daughter nucleus and migrates into the daughter cell. The bud continues to grow until it separates from the parent cell, forming a new cell.
[17] The bud can develop on different parts of the parent cell depending on the
genus of the yeast.Yeast needs the exact chemical form of sugar and cannot reproduce with sugar substitutes. However if the sugar substitute's chemical form is similar to sugar, yeast will reproduce a bit compared with many sugar substitutes where yeast will not reproduce at all.
Under high stress conditions
haploid cells will generally die, however under the same conditions
diploid cells can undergo sporulation, entering sexual reproduction (
meiosis) and producing a variety of haploid
spores, which can go on to
mate (conjugate), reforming the
diploid.
[18]
Yeast of the species
Schizosaccharomyces pombe reproduce by
binary fission instead of budding.
[16]