HELP!! Powdery Mildew! Week 9 of flower!

That's rough timing but you caught it early enough! Since you're at week 9, harvesting ASAP is definitely the right call. The buds you can save will still be worth it. Good luck with the trim!

Aphids/spider mites/thrips..........some sort of insect, sap sucking pest..........not powdery mildew IMHO. Nothing you can do this late in the cycle.........just ride it out and do nothing.......harvest as scheduled. Damage will be minimal, if it affects your buds at all. Insects generally attack the leaves......we humans generally discard the leaves. And yes, more leaves = more energy being produced = more potential.

When warm, dry days are followed by cool, humid nights. Control your nights. Don't let the rh stay above 60 at night, sporolation.

nothing is really safe to spray on a flowering plant for pests... Looks like you are close to the end at least.

pest, not mildew. Check underside of leaves... definitely being chewed on. Where are all the leaves? You plants will turn out better with more leaves. mildew will form a small round colony and by the time you can see it, it is spreading. It will have a fuzzy, textured appearance. Under schope the trichomes will look like some webbing/netting is coating it. There is no effective treatment for WPM. Even the stuff a large farm can purchase is garbage against WPM. Don't let anyone tell you the opposite. You can cut it out and hope it doesn't spread. Poor climate control is the primary cause. Avoid high 65% RH and it will be rare.