Hello,
So you're pretty far into flowering so treatment is limited. You could do an alcohol/water spray,and beef up airflow immensely!
After you harvest you could do the bud bath...it'll wash off anything mites, pm. You can find the Cervantes video on it, 1 cup hydrogen peroxide in a tub of water.
But for next time, buy a product called green clean(agricultural) and that will slay those mites, especially if you add neem to it, you'll be mite and other problem free for 1-2 months easy.
I've never gotten overly worked up over bugs because of outdoor grows....so I'm sure you'll still have some nice buds.βοΈ