Overgrow use neem oil with silica from protekt as an emusifier. You can even add a little sm-90. Just give them at least 10-12 days from application. Great organic way to control the problem. Dont anyone flip out on me here, but in my experience, pm can only be erradicated with a systemic pesticide such as eagle 20. Pm was pumping through all my moms veins and spreading it to all offspring. I used to battle pm on a regular basis. Ever since i applied e20 in a veg a few times i never ever see it anymore and i havent sprayed e20 in like 8-10 months. Its a systemic issue that was only erradicated with a systemic pesticide. Thats how it went for me anyway. I know the all organic heads would hate to see anyone use e20 bit i keep it on reserve with a few nasty pesticides in case the artillery becomes necessary.