White Powder near the end of flowering

that looks like chlorine have you used any tap water to spray on your plants? could be that.... otherwise i dont have a clue id love to find out tho .....
 
Worst case of mildew ive seen(looks like its snowing inside). Not much you can do now the buds will be moldy. Dehumidifiers fans and more fans next grow.
 
Definitely some bad pm (powdery mildew). I have some popping up too. I'm using Neem and high temps now but on the recommendation of others, I am going to try some serenade later today.

good luck - it sucks. you will have to scrap your current grow and start a new one.
 
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