Treating powdery mildew

[Mo Boggie]

Hi, I'm noticing what appears to be, what I can only describe as, a whiteish like dusting on my orchid leaves that doesn't wipe off. My humidity has been in the low 50's with temps in 70' s. I'm thinking it's powdery mildew. If someone has advice on how to remedy my situation, it would be greatly appreciated. Thank you

[Dollythehun]

My low tech solution for nursery plants was 1 tsp baking soda in a quart of water and a drop of dish soap. Spray and make sure your air circulation is good. Someone more knowledgeable than myself may know if that is really what you have. A picture would help.

[gngrhill]

a picture would definitely help