What stops the growth (reproductive) phase? Usually its running out of Oxygen in the brew.
Yeast doesnt want to make Alcohol; it wants to make Yeast, under adverse conditions it will switch over to alcohol production, to poison its neighbours so when conditions change (i.e. more O2 becomes available) it has more opportunity go back to making yeast.
We just subvert the process to get the yeast to do what we want, but yeast is always hungry for Oxygen.
MHB
Yeast doesnt want to make Alcohol; it wants to make Yeast, under adverse conditions it will switch over to alcohol production, to poison its neighbours so when conditions change (i.e. more O2 becomes available) it has more opportunity go back to making yeast.
We just subvert the process to get the yeast to do what we want, but yeast is always hungry for Oxygen.
MHB