MLF during or after fermentation for Zin, Cab, Merlot?

MLF during or after fermentation for Zin, Cab, Merlot?

Post by Daniel Tortoricc » Mon, 30 Aug 2004 11:56:45



This is the first year I am planning on malolactic fermentation for my
reds if acidity is right. Two questions:

1. Given that Zin tends to get high in ***, I am considering adding
MLF during primary fermentation. This make sense?

2. Tempeture wise, I have two choices - a wine room at 56 deg or in the
house which probably averages mid 70s. Looks like the house is the
better temp for this but would like to get it into the wine room as soon
as possible. Any experience if adding MLF bacteria during or after
primary fermentation hastens MLF?

thx for any insight,
dan

 
 
 

MLF during or after fermentation for Zin, Cab, Merlot?

Post by Tom » Tue, 31 Aug 2004 03:58:36



Quote:
> This is the first year I am planning on malolactic fermentation for my
> reds if acidity is right. Two questions:

> 1. Given that Zin tends to get high in ***, I am considering adding
> MLF during primary fermentation. This make sense?

Yes.  It's useful to take advantage of the temperature spike during
fermentation to get the ML going.  If you're going to do this, let the
fermentation get started for a day or so and then add the ML culture.  BTW,
you should not add any sulfite at crush or the ML may not start until much
later.  Also, don't do this using a Bayanus strain of yeast such as the
ever-popular EC1118 (Prise de Mousse).  Bayanus and ML bacteria compete for
the same nutrients IIRC.

The above are recommendations from The Wine Lab.  I've followed their advice
for many years with no problem.

Quote:
> 2. Temperature wise, I have two choices - a wine room at 56 deg or in the
> house which probably averages mid 70s.

You want red fermentations to develop some heat.  Peak temps in the 80s and
90s are OK.  That won't kill the yeast, and it makes for good color
extraction.  I once had a Pinot Noir peak at over 100oF without sticking.
It went dry virtually overnight!  (That was in 1983, and it was really hot
that year.)  Anyway, the time for the cold room is after the wine finishes
ML.  That's also when you should first add sulfite.

Tom S

 
 
 

MLF during or after fermentation for Zin, Cab, Merlot?

Post by Daniel Tortoricc » Tue, 31 Aug 2004 08:59:27


Thanks Tom, additional questions below:



Quote:



> > This is the first year I am planning on malolactic fermentation for my
> > reds if acidity is right. Two questions:

> > 1. Given that Zin tends to get high in ***, I am considering adding
> > MLF during primary fermentation. This make sense?

> Yes.  It's useful to take advantage of the temperature spike during
> fermentation to get the ML going.  If you're going to do this, let the
> fermentation get started for a day or so and then add the ML culture.  BTW,
> you should not add any sulfite at crush or the ML may not start until much
> later.  Also, don't do this using a Bayanus strain of yeast such as the
> ever-popular EC1118 (Prise de Mousse).  Bayanus and ML bacteria compete for
> the same nutrients IIRC.

> The above are recommendations from The Wine Lab.  I've followed their advice
> for many years with no problem.

Absolutely no sulfite or minimal, something minimal like 10?

Quote:
> > 2. Temperature wise, I have two choices - a wine room at 56 deg or in the
> > house which probably averages mid 70s.

> You want red fermentations to develop some heat.  Peak temps in the 80s and
> 90s are OK.  That won't kill the yeast, and it makes for good color
> extraction.  I once had a Pinot Noir peak at over 100oF without sticking.
> It went dry virtually overnight!  (That was in 1983, and it was really hot
> that year.)  Anyway, the time for the cold room is after the wine finishes
> ML.  That's also when you should first add sulfite.

> Tom S

Primary I always do in the house (avg mid 70s) and temperature peaks in
the 90's during primary fermentation. I guess I need the same
environment for MLF as well (which means I'll be looking at those tanks
for a number of weeks).
 
 
 

MLF during or after fermentation for Zin, Cab, Merlot?

Post by Ben Rott » Tue, 31 Aug 2004 10:13:14


Quote:
> 1. Given that Zin tends to get high in ***, I am considering adding
> MLF during primary fermentation. This make sense?

Definitely.

Quote:
> 2. Tempeture wise, I have two choices - a wine room at 56 deg or in the
> house which probably averages mid 70s. Looks like the house is the
> better temp for this but would like to get it into the wine room as soon
> as possible. Any experience if adding MLF bacteria during or after
> primary fermentation hastens MLF?

I don't believe inoculating MLB during fermentation necessarily
hastens MLF. Mid-70's in the house is certainly preferable. One thing
to keep in mind if you are inoculating during fermentation is
yeast-MLB compatability (e.g. bayanus yeast strains tend to compete
for nutrients and this can be an issue).

HTH,
Ben

 
 
 

MLF during or after fermentation for Zin, Cab, Merlot?

Post by Tom » Tue, 31 Aug 2004 11:11:36



Thanks Tom, additional questions below:

Absolutely no sulfite or minimal, something minimal like 10?

I use none if the fruit looks clean (no rot).

Tom S