powdered mildew

I am getting powdered mildew on my leaves. This is only my 2nd grow, so i am wondering how big of a deal is this? Is there anything i need to do, or do i just let them be? Thanks in advance

http://en.wikipedia.org/wiki/Powdery_mildew
^ has a picture remove infected area make sure you have effective airflow

...up your airflow if your setup is with freash air and get a dehumidifer.
...if your in an airtight room, get a sulpher burner and use the dehumidifer....imo.

aLSO LOOK INTO USING MILK... I USED IT ON MINE. AND THEY WERE HARVESTED. NATURAL SAFE
ALSO HYDROGEN PEROXIDE... ! BOTH WORK! BUT ONE IS FOR GROWING LEAVES. THE OTHER WHEN CUT

what do you mean, use milk? This is only my 2nd grow, so sorry if the question sounds dumb

ok PM 101......Pm is inside your plant....when you see the white fungus growing on the outside leaves the pm is reproducing at that time

2/3 cup non fat milk in a 32 oz spray bottle of water will knock down PM for 3-5 days

1/4 cup 3% hydrogen peroxide in that same 32 oz bottle of water will knock it down for 3-5 days

I use GreenCure knocks PM down for about 10 days

PM is herpes for weed you can control it keep it to a minum but once you get it you will always have it...unless you scrap your grow clean everything filter your air intake and grow from seed and then clone and never except other peoples clones

what he means by using milk...... get a spray bottle add a couple tbs of half/half milk, a few drops of dish soap, and fill the rest with water. stir it up a little bit and spray it on the infected areas of your plant. i just did this to a couple of my plants that had PM today. after i sprayed it on, i took a paper towel and wiped the leaves.