I have low heat going under there now, and it seems to have stopped it cold.
I will NOT be opening the stupid vents I had to put in in the spring, and when the inspections are finished I'll be permanently sealing the openings. (I also hear they are now OUTLAWING crawl space venting down south, likely for this exact problem. Now if they can just follow suit here....)
One drop of bleach should affect the mold. It will bleach it. Will not affect dirt. This is a test to determine biological vs dirt