What the hell is this ??

I have a white powder on my fan leaves ,mold ?? temp is 70 humidity is 50 % lots of air movement ,what caused this and how do i get rid of this ,Happy Farming ,Cajun

same answer as before your grow room is dirty or something is wrong, mold dosent appear out of thin air.

Pics?? Making post not too short

Probably powdery mildew. I bet it gets cool at night.

without a pic it definetly sounds like powdrey mildew, like buds says try a sulphur candle. theres a thread on the diy section to make them i think.

powdery mildew for sure. No it doesn,t come out of thin air, but mold and mildew spores are everywhere...yes everywhere.

you can go the sulphur route, I just use serenade (its a fungicide). It's cheap and effective and OMRI listed. If you have a big boner about doing things the natural way you can use baking soda or milk sprays as well. I just don't like fucking with the PH of my leaves that much.

Cheers.