I said you should scope them instead of being dramatic but yeah.. it looks like russet mites / minor insect issues. In short order your crop could be turned into extremely low thc low terpene hay reeking bunk
This late you can burn/spray sulfur, ogbiowar to slow them down. There isn't anything super effective you can use this late. Predator mites won't help in time. Feed your plants aspirin! It'll help the toxic syndrome they are displaying
Number one... Freaking scope them before taking drastic measures
Yep plane to scope them tonight picked up a higher power scope
Get some Ambyseilus Andersonii predator mites for the next crop, they come in little sachets with hooks you can hang on your plants. These guys are very effective against russet mites.
You're going to need to tear down sterilize and start over with new genetics. Don't forget your house.
~5% hydrogen peroxide sprayed/fogged everywhere kills the eggs just use PPE it will burn your lungs.
You most likely got them from your clone guy if you don't work from seed, maybe try someone else. It also may be wise to chop now while you can still make some half decent hash oil. Good luck!
I always hang out yellow sticky traps everywhere in the grow! Most especially in the beginning and keep them there until the very end. Bugs think they are dead yellow leaves and fly to them first and get trapped in the sticky glue. I just check the yellow cards for bug traffic. You would be surprised how many bugs you catch. There has to be plenty of room for them though, because if a plant's leaves touch the sticky traps, you lose some of leaves and have to replace the traps. Super for white flies!