Help diagnose my problem. White spots on leaves

100% mites. broad vs spider is the question. Tricky when its in flower. Do things mites hate. keep humidity a bit higher, 45% create air moment, fans spray them with soap/dish detergent that can be easily rinsed off with water in the shower after. can purchase predatory mites that will eat the broad/spider mites as well. you will not eradicate them fully. just control their population from exploding and fully destroying your crop. Eggs will fall off and hide in the soil and they will try and move to other plants. so after this is all done you need to "nuke" your grow room with an Miticide/Acaricide. Your soil will need a bake to prevent them from coming back if you plan on recycling that medium. Or just toss it in the garden bed. Best of luck

You have spider mites look under leaf to be sure

Not powdery mildew. Dealt with enough to know that’s not. I’ve also dealt with thrips and this doesn’t quite fit that.. at least not what I experienced. If it’s thrips you should be able to see little tiny yellow guys if you investigate thoroughly. Definitely appears to be a pest of some sort. Hopefully someone will chime in that’s see this specifically.