Is this powdery mildew?

[strik]

Hello strainhunters, cannabis lovers and stoners.

 

I have a bit of an emergency i think.

Today i discovered some white spots on some of the serveral leaves on one of my super skunk. And was hoping some of could tell me if it is powdery mildew im dealing with.

 

my setup is a 400W  HPS bulbs in a  0.9 x 0.9 X 1.8 m tent and use im using GH feeding for short flowering. the humidity never net above 60% at night and is between 40-50% when lights are on.

in the tent i have 4 plants, 2 of them is skunk #1 and 2 is super skunk. it is only one of the super skunks which has the white spots.

 

wouldnt PM affect atleast both super skunk and not only one? 

[GreenQc]

Look like it does round white spot are a sign of powdery mildew : Make sure to be over 70 degree F. at night and have a good ventilation system to move air around. But you need to treat this asap.

[jankahar]

it doesnt look like powdery mildew at all, pf is more fluffy stuff on top of the leaf and covers the leaf differently it looks almost like miniature fake snow that will rub off when you touch it. its not powdery mildew

 

but it could be maybe white spot fungus, possibly a cercospora brassicicola fungus or some other similar pathogen

 

have you sprayed the plants alot? do you have proper airflow?  if it is  the white spot fungus it likes warm and humid conditions that lack of airflow, overcrowding the garden can cause it too besides the lack of airflow