Ok, got a few things I dont think i saw on this thread yet in a quick read thru, sorry if im repeating. Im in NY and its been jungle conditions here too. I had a little pm on my outdoor patio autos, raising the ph of the leaves was key to fixing my issue, along with a good defoliation. Foliar with silica can help short term raising ph and help long term leaf health so they can fight back better. Whole laundry list of benefits for mold and pest management along with the structural support it provides. Any saponin will also be great for them, there's an older thread on here from 2017 that will help. I like aloe and u could grow a bunch in ur greenhouse. I had good luck with Dr. Zymes, its better for smaller infestations though, maybe try the higher dose. I used
mammoth Canncontrol first right before flowering started. After the foliar i used excess as a soil drench. Both kill mold, mildew, and a bunch of other pests, but I only use Dr. Zymes during flower. Sprayed it right on flowering autos, rinsed 2 hrs later and then direct fan to dry. Not oil based, doesn't need a surfactant. And can be used often, just spray off a cpl hours after with water with a higher ph (7.8-8.0 is what i used) A little discoloration of pistils but they recovered. Killed my thrips and the pm. Never run a greenhouse but it wouldn't hurt to look at some filters for ur fan intakes and maybe vinegar spray all your walls and surfaces. Cant keep out all the spores but its a numbers game, knock them down as much as possible. Sorry if my post jumped around but i harvested my tent monday night and havent gone to sleep yet. I'm wasted off adrenalin and the test branches i cut a week ago and fast dried. Good luck!