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Am I to worry? This stuff is like a frosty film, only down low where branches meet the main stem... Also spotty on a few of the leafs... Its only on 2 of my 6plants... There both LST
powdery mildew sorry man... are you flowering yet? Treat it now before you start flowering.. pm sucks. i hate it with a passion.. after my current run im shutting down and gonna bleach everything and move. LOL
If you have access I would use some systemic like the people here suggest and then take some cloens to have some clean plants. Or you can try some of the other stuff like serenade or greencure.. If you can fix your environment tho you can usually keep it at bay unless your in a really bad area for it. Wats your RH and temps? Usuaully lower RH will help with it.
RH is 70% max when lights off, and bout 50% lights on... RT 77F high and 63F low... They are in veg for the fourth week since I got the clones, these two are my biggest ones(Durban Poison)... I was gonna clone like this Friday and switch 12/12 saturday...Does Milk really help? I really dont want to loose these bushes!!!
I haev used milk to save a harvest. It does not kill it at all but it does keep it controlled as long as your not under heavy mildew pressure. I think the 70% is a little high... you might wanan try to get it lower.. and get air flow up if you dont have oscillating fans already. ( after you spray em .. ) If you haev nothing now. I would spray em with a 10% milk solution ( use skim milk.. fat milk will stink ) then set up the fans... dont set up the fans if you havent sprayed or washed at least most of th spores off.. otherwise your just blowing em all over for em to replicate..