I've just applied a new product, Micro 108, to my plants to control PM. I picked it up at a local Ag supplier "Western Farm" - but you can chase down a local supplier thru the company's web site. $100 for 18oz.
Living in a coastal area, marine-influence humidity is a constant plague.
I've used Neem, it's very effective, but I don't like to apply it late harvest. Sulfur smells bad to me.
Micro 108 should control (prevent) bud rot, and PM, according to the label. It's sold in Garden Centers as Actinovate. ($25 for 2 oz)
Here's a link: http://www.naturalindustries.com/
It's a biological organism, NO RESIDUE! It mixes us easily, just 1 tsp/gal . It comes in a carrier/powder (milk whey), to it's totally safe, and cheap at no more than US$2.00 per gal RTU spray.
I just sprayed some plants with 2 weeks left, others in veg. The PM disappeared overnite, on anything except lower leaves of an Ae77 Calio in early veg. I re-appllied affected leaves and it hasn't returned after 4 days.
Sorry, no photos for now, I'll be back with follow-ups after a couple more weeks.
Y'al that know me know that in Winter it's the PM, summer, the borg! Maybe I'll be able to go back to some of those chunky strains from Red!
PS - Congrats on the new site!