Quote:
Originally Posted by greentiger87
Hi Ray,
The yeast in this case are dead. They're meant to be a source of nutrients and growth factors. Any that are alive in the brewer's yeast powder will quickly be killed by the boiling or pressure cooking.
Common brewers yeast (Saccharomyces cerevisiae) has only very small amounts of chitin in their cell walls.
The active organism here is whatever you inoculate with right before you turn on the air pump and let it sit. In my case, it's Streptomyces lydicus. I have access to useful Streptomyces griseus and Streptomyces violaceousniger strains, so I will try them as well.
And yes, I did try them on my roses, for active blackspot. Because I didn't have a control, it's hard to draw useful conclusions. But the blackspot did not spread after spraying with it. I had too many roses to really keep it up though.
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OK, I wasn't sure if you were using a culture that could be activated or a spent one. Regardless my mistake, you were sterilizing the mixture beforehand. so it wouldn't matter anyway.
The yeast has a lot of vitamins, amino's and minerals in it from the dead organisms and the food sources they were grown in. I guess that's why it's used in other culture mediums. Good food supplement for people and animals too.