Wyeast 4007 Malolactic Bacteria

Wyeast 4007 Malolactic Bacteria

Malolactic Bacteria Accessories  
In Stock
Delivers to ( change ) by as part of our Fast & Free Shipping.
Faster Shipping Available. Details.
60 day no hassle return policy. Details

A liquid Malo-lactic culture that contains a blend of ER1A and Ey2d malo-lactic cultures suitable for a fermentation pH of 2.9 or above and temperatures as low as 55F (13C). Good for 5 gallons of wine.

Notes from Wyeast: Fresh liquid cultures of L. oenos ER1A and EY2D provide rapid and complete malic acid to lactic acid reduction to balance and soften wines. ER1A and EY2D perform well in conditions of low pH and cool cellaring. Typical conditions of high wine acidity can be improved by reducing the harsh, sharp malic acid in the wine to the softer and smoother lactic acid. Other flavor improvements including vanilla and buttery notes can be anticipated. Natural occurring malic acid bacteria on fruit may be of inferior quality or quantity to complete malo-lactic fermentation. Vinter's ChoiceTM malo-lactic cultures are suitable of pH 2.9 or greater and cellar temperatures as low as 55°F.

Test Results (At this time we do not know what strains of malo-lactic were involved in this test.):
The performance of two strains of Leuconostoc oenos, Er1a and Ey2d, isolated from Oregon wines was evaluated in experimentally and commercially produced wines. Experimental lots of Chardonnay, Pinot Blanc, and Pinot Noir were inoculated at the end of yeast fermentation at 18°C with approximately 106 cfu/ml of Er1a, Ey2d, ML-34, PSU-1, MLT-kli, and BB44-40. Under low pH conditions, the Oregon strains completed MALOLACTIC fermentations (MLF) more rapidly than the other commercially available strains: at pH less than 3.3 Er1a completed MLF in an average of 48 days, Ey2d in 94 days, MLT-kli in 127 days, and the other strains in 143 days or longer. At pH greater than 3.4 all the strains completed MLF within 31 days. Commercial wines were inoculated during yeast fermentations with 0.5 to 2.0% V/V Er1a and Ey2d grape juice cultures (109 cfu/ml) and wine cultures (108 cfu/ml). Er1a completed MLF in 1-2 months at cellar temperatures of 15°C or higher, but was sensitive to cooler temperatures. Ey2d was more cold tolerant and completed MLF in 2-3 months at temperatures in 12-15°C. In addition, Ey2d retained MALOLACTIC activity at temperatures as high as 80°C when all other strains including Er1a were inactive.

Click here for a PDF of the MoreWine Manual on Malolactic fementation.

Item # DYWM6
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.25LBS
Community Q&A

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 6 questions Browse 6 questions and 49 answers
Why did you choose this?
MoreFlavor Store
I have used it before and liked it
John B on Oct 16, 2019
I have used this product before.
David M on Oct 1, 2019
I have used it before and liked it
John B on Oct 16, 2019
used it before
OSWALD L B on Oct 14, 2019
I have used this product before.
David M on Oct 1, 2019
Will use this for this years Frontenac rouge vintage
Charles L on Sep 21, 2019
I only need enough MLB for a 6 gallon carboy
Peter N on Sep 21, 2019
Of the malolactic cultures I've used, this one works the best for small batches
Daniel M on Sep 19, 2019
Only need for 5 gals
Kenneth B on Sep 17, 2019
Recommended to me by fellow winemakers for red wine
Mario Montemor Da S on Sep 12, 2019
Used it last year
Travis B on Sep 5, 2019
size appeals to me
Margaret M on Jul 24, 2019
I liked it last time I used it
John B on Jun 11, 2019
Theresa G on May 20, 2019
I've used this before. It worked well and is very easy to just open and pour into mu must.
Don on May 14, 2019
Malolactic culture for Merlot
Goose on Apr 12, 2019
We've had consistently good results with this product when used on a variety of dark red juice.
James H on Apr 10, 2019
I plan to use for ML fermentation in my next pinot noir
Peter N on Apr 1, 2019
Buttery Chardonnay
Evan W on Mar 30, 2019
Has always worked for me in the past!
Valued C on Dec 31, 2018
Ease of use and need
Nicholas F on Oct 16, 2018
malic to lactic acid in wines
Daniel K on Oct 15, 2018
It works the best
Chris R on Oct 11, 2018
Used before with great results
Brian P on Sep 20, 2018
I don't want alot of sulfides in my wine
John f on Sep 17, 2018
Just why I need for now
Eric D on Aug 8, 2018
generic dry red malolactic culture
ALEXEY S on Jul 24, 2018
Need to restart a stuck malo fermentation
Mitchel Adam R on Jun 26, 2018
best price on line for malolactic bacteria
Judy B on May 30, 2018
For secondary fermentation
Peter F on Apr 21, 2018
The apples I'm using to make cider are too acidic. Need to experiment to reduce acidity.
Chelsea L on Mar 22, 2018
cheaper than the other product
David L on Mar 20, 2018
Making red wine
Tin N on Mar 16, 2018
Will doing MLF with some wines I’m making.
James P on Jan 15, 2018
Because the is one of the few packaged for small batches and has been relatively reliable for me
Craig on Jan 15, 2018
used it before
OSWALD L B on Oct 14, 2019
Will use this for this years Frontenac rouge vintage
Charles L on Sep 21, 2019
Storing for future use?
Jerry Martinez on Oct 6, 2019
BEST ANSWER: I’ve only stored for future use once. As long as it stays refrigerated. I did this with the malolactic last year as I made my whites a little later than normal. It was fine, worked well. As soon as I receive any orders of yeast from More Wine I immediately date them, write which type of wine I will be using with that certain yeast and then refrigerate. I usually by multiple kinds of yeast prior to buying my wine grapes or juice but I usually have an idea of what I want. Sometimes my local wine supplier does not get certain varieties that I’m looking for. Also, I enjoy More Wine’s yeast pairing guide!
Is it recommended to use OptiMalo nutrients with this liquid MLB? Or are nutrients already added in the liquid culture?
Kevin E Hart on May 29, 2019
BEST ANSWER: Hi Kevin - The nutrients aren't required for MLB, but can help aid the fermentation.
I've used Acti-ML in the hydration phase for dry malolactic bacterias. Already hydrated, I presume this is not necessary when using Wyeast 4007 Liquid Malolactic Bacteria. Is this correct?
Don on May 16, 2019
BEST ANSWER: Presumably it should not be added, but I don't think it would hurt. Read the info on the Acti-ML.

You should consider Opti-Malo as a nutrient though when adding the liquid Bacteria.
Is the packaging good enough for International Shipping without Ice Pack?
Kyaw Thuya on Mar 10, 2019
BEST ANSWER: Hello Kyaw - Wyeast's packaging is extremely sturdy as these are intended to puff up without exploding. It should be fine for Intl. shipping without ice, however may require some propagation to regain vitality.
Should this be shipped on ice?
Peter Gabriel on Oct 15, 2019

5.0 / 5.0
4 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Started right up after primary was complete. Keeping temp 70-75
October 8, 2019
1 month ago
Rapid MLF
Takes off fast and isn't picky! None of the stinky MLF aromas that some other strains produce.
October 3, 2019
1 month ago
Worth the effort & small expense
I have used this ML culture before with great results. Paper chromatography verified results. Added at the end of the alcohol fermentation after first racking. Economical to use compared to others I used. Pretty hard to show a picture of something that is on the pallet, but a double gold Merlot is proof for me.
April 27, 2019
6 months ago
No guess work required!
So far so good and it’s serving its intended purpose.
November 6, 2018
1 year ago