here ya go dude should clear it up for you

Powdery Mildew : To one bucket of water add 7 teaspoons (20 grams) of bicarbonate of soda and sufficient laundry soap to make a rich lather. Stir the mixture to dissolve the bicarbonate of soda powder. Spray both sides of the affected leaves.
bud breath420 Reviewed by bud breath420 on . Powdery Mildew I have a problem with some of my girls. We had lots of heavy rain in August at my spot on the planet, with correspondingly high humidity. My babies were wet and damp for prolonged periods. Now the lower leaves on some plants have powdery mildew. For people who don't know what that is, its a mildew (like a fungus) which feeds off the plant leaves and propagates using spores to infect healthy plants. Now I know the classic cure for this problem is a Sulphur spray or the use of Potassium Rating: 5