Canni...It does look like PM...some strains are worse than others...
oil sprays with baking soda work, but if they get PM it always comes back. It is airborne and usually on roses. I use a diluted H2O2 if the PM is not that bad, can be sprayed on buds up to day of harvest.
And it is a fungus that grows on the surface...it can cover a plant and weaken/kill it if conditions are right...but I would not consider it to be systemic as it grows on tissue rather than being spread throughout the tissue.
Keep temps under 80.
oh, and ABSO-FREAKING-LUTELY better than spider mites!