Powder mildew treatment while flowering

[Garyoutlaw]

My T5 soil grow is 56 days old & well into flowering when I have just started to get powdery mildew in a few spots. I have been quick to pluck any affected leafs and adjusted the plants to get better air flow. I can't find any treatment listed for this late into flowering:cry:

 

[JM]

The only thing I would feel comfortable recommending is the good ol diluted skim milk treatment (1 part skim to 9 parts water, spray affected areas), along with bringing down your humidity to under 40% & bringing in plenty of fresh air.

potassium bicarbonate is also used to work well & is safe, but I've never used it personally

or a air ionizer in place of or in addition to a hepa filter...

http://www.autoflower.org/f7/organic-pesticides-1139.html

 

[Garyoutlaw]

Being so close to harvest has me frozen in my tracks & don't know what to do..The odd part is that only 1 of the 7 in this grow has the mildew showing.
I just found this video showing a treatment for after the harvest but it sure scares the hell out of me http://youtu.be/S7jE7qzfgQs