Yah I think it's too late (assuming you're running 8-10 week strains) to use sulfur or any oils and not taste it in the finished product. I would use a potassium bicarbonate product such as green cure, or potassium bicarbonate powder. Mix it with some dutch masters penetrator. Keep it on hand and spray once today, once again in 3 days and again 3 days later. So 6 days from now you would have sprayed the 3rd time and it should take care of your PM problem until you crop.
You should also address the source of the PM, high humidity, sitting water, PM on vegetation around your grow room, etc.
How many CFM's are you pulling out of your room?
I am using a 165 cfm for a 12 cubic foot cabinet with carbon filter attached
Maybe you need to pull more air from the tent?
I discoverd my girls had some bad PM around week 6, my retarded ass has never had it before so I wasnt preped. I sprayed with serenade, bi-carb, 35% perxoide with a ryobi paint sprayer, and I honestly wish I would have just burnt sulfur,depending on how bad it is dude you might want to just burn sulfur. It may take some cure to get the sulfur smell gone ( I know good friends who claim they burn real late without problems) but if its gets out of control you will be worse off with powder donut buds . I have 24cans of duster infront of me and I have just spent 8hrs cleaning a 1/2lbs watching judge judy. not to mention the shit buttfucks your yeilds.
Good luck bro I would trade PM for all the mites in the world
Chopping early sucks. An h202 mix will literally eat the mildew off of your buds if they are powdery when you get home. Spray PB, then hope PM doesn't come back real hard. If it does, spray some h202 to get rid of it and then harvest.
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