DBannedanswered grow question 4 years ago Hi,
Decrease humidity, decrease water intake, Make sure there is a lot air flow. Remove infected areas. You can also wipe the leaves and clean the Powdery stuff off the leaves. (usually, i removed the leaves, and keep the plant between moist and dry.
I saw this online you can try it out Apple cider vinegar.
This is an old, trusted way to combat powdery mildew. Mix 2 teaspoons of apple cider vinegar (organic is best) per quart of clean water. Then spray the mixture onto your plants to help organically kill powdery mildew traces
Happy grow!!