Here is a DIY fungicide mix....dunno if it works tho....

1 heaped tbl spoon of bicarb of soda
1 tbl spoon of neem oil
1/2 tbl spoon soap
1 gallon of water

Some research suggests it works as good as commercial products.

Use of Baking Soda as a Fungicide
zebulon Reviewed by zebulon on . Battling mold in rainy climates I was thinking about growing outdoors, and the things one might do to help prevent mold or bud rot. If youâ??re lucky enough to grow in an area where end of season rain is not an issue, then this probably wonâ??t interest you. I envisioned all these contraptions I might build using camouflaged or transparent tarps, plastic bags, or fans with really long extension cords. The more I thought about it, fans were definitely out, plastic bags would only hold moisture in, and the tarps would be a Rating: 5