Why do Jolly Pumpkin dregs make the beer sour?

[Stiltzkin]

Hello,

In my experience, if I add JP dregs to ferment my wort it will make it slightly sour. Why is this?

My understanding is that:
Brett shouldn't produce sour beer unless stressed or in the presence of oxygen.
Lacto shouldn't survive in a wort with IBU > 8 - or is this just true for the White Labs/Wyeast strains?

Is it pedio?

Cheers

 

[smokinghole]

Not all lactobacillus is created equal. The labs sell weak strains. There are very hop tolerant strains in nature and in labs, just not sold commercially through yeast labs.

 

[joshrosborne]

Not all lactobacillus is created equal. The labs sell weak strains. There are very hop tolerant strains in nature and in labs, just not sold commercially through yeast labs.

This. Lacto Brevis is more IBU-resistant, from what I understand.

 

[nicklepickles]

Also brett will sour things. Not as quickly/effectively as lacto or pedio, but given enough time, it will make acetic acid.

 

[Stiltzkin]

Yeah, what I suspected. Hopefully the bigger yeast labs will release more aggressive strains.

 

[MileHighBrewer]

With some newer yeast companies popping up (The Yeast Bay, Gigayeast, etc) I think they'll probably corner the super-bugs before WL or WY will. What the big 2 make, sells, and is consistent. Homebrewers tend to be one of 2 sides....super safe/consistent or experimenters. I have a feeling the new companies will cater to the later (well I hope anyways).

What ever is in the air in Dexter, keep it coming. LOVE using JP dregs