Hey bro... since I read about your possible PM issues I've been thinking... Have you considered using straight, undiluted microbe tea as a foliar spray? I have a book on compost tea making that talks about vineyards using fungal dominated teas to combat powdery mildew, downey mildew and Botrytis cinerea one the grape vines. You could also use a very good balanced tea like Natures Own.
I'd be glad to look through it and post some excerpts and additional info if you're interested. I can also see what they have for fungal tea recipes in the book.
I'd be glad to look through it and post some excerpts and additional info if you're interested. I can also see what they have for fungal tea recipes in the book.