Did you spray with the lights on?? You
can't shouldn't do that.
Perhaps with your current grow, but there are lots of people who had pm and eradicated it.
There are some products made by Marrone Bio, namely Regalia, that are supposed to be great and were recommended to me by several members here. I am trying it now. It's not cheap! I am using it 2 x a week now. You can spray it even on flowering pants and it is certified organic. It works differently than all the other band -aids
Regalia® Bioungicide delivers improved crop yield and harvest quality by stimulating a plant’s ability to fight diseases. Effectively control Powdery mildew.
marronebio.com
I'm battling it too...It is like the f***ing herpies of the plant world. I even tried eradicating it with an ozone generator!
Personally I would throw away the sprouts, clean up everything,and start again! Think sterilization like your life depended on it. Everything needs to be cleaned. You're not using any of the old soil are you??
Here's a thread worth reading for you, and anyone else who doesn't have an IPM
Has anyone successfully gotten rid of powdery mildew for good . If so how? I'm in mid flower stage just using a mild milk and water solution to maintain , but spraying anything on your plants that heavy will always impact them in a negative way somehow. Yesterday I tried the heat method. Can...
www.rollitup.org
Good luck to you, me, and anyone else who gets this freakin' soul crushing plague!!
my older Grow i dealing with this Shit and i thought i have won the battle and now i see a Spot on my New Seedling Plant that's makes my Nervous.... What can i do now? I don't want to Spray the Rest of the Grow 
