Well, seems that I may have found something that will at least slow their growth. I was talking to an engineer friend of mine and he suggested borax, what? Yep just like you find in 20 mule team borax, he says its not harmful to humans but fungi don't seem to like it. Tried it out on Friday and it seems to be the best thing I can find since napalm is in short or restricted supply and I couldn't find anyone willing to fly the B-52.
(If applying 20 mule team borax is against any federal, state or local ordnances, this post is entirely fictional, and has only been posted for purely entertainment purposes only)