Help with PM

[kann9]

I switched to 12-12 light two weeks ago today. I have a carbon filter and inline fan hooked up. Temperature is around 74 F and the humidity is around 30%. The light I am using is a LED 432W. Two out of three of my plants have some PM on them and this is my first grow so I don't know what to do to control it. I read about baking soda and water but does that work? It's a small tent, measuring 39x39x79. Here is a photo of the Casey Jones with the PM.

 

[bongwaterbob]

Sorry bro pm sucks, looks pretty bad cut off what you can be gentle that shits airborne spray with a systemic fungicide like a fruit tree spray every three days and cross your fingers...?

 

[JJ Bones]

How far are you into flower? Looks like maybe 3 weeks?

Ultimately a sulfur vape will be best, however in your small area it might be too much of an investment for you.

Does humidity stay 30% always?

 

[Muttt]

Your temps and humidity are good. Try using lemon juice mixed with water 1 part lemon, 2 parts water. Mist them with this at least once a week. Once you get powder mold, it becomes systemic and your plant will always have it. But, you can keep it under control with the lemon juice.