sorry for butting in but the only time ive had mite problems was insufficient air flow on the plants...are you guys beating up the plants with fans? If not you should. Nature beats em up. Those little bastards hate major turbulence. Never had mite problems outdoors, who has?. Fans blowing on plants 24/7. For what everyone wastes on chemicals its worth a try it works for me and I have mites on my indoor house plants but not on my controlled crop (controlled meaning fans). I heard years ago guys talking about cranking co2 to the moon in their rooms for a few days to choke off the bugs. Just a few thoughts
I have had mites outside, it happens. Completely organic outdoor space. They happen, the plants were healthy enough to overcome them, but I get them from time to time outdoors, most plants do.........ok, plants in wet areas in the pnw, humidity swings are common and I have feeling we are in a mite breeding ground at times both harmful and beneficial.
As for turbulence, it will slow them down, but not eradicate them. Granted I blow over my ladies indoors always but it is to manage the humidity to slow them down, which is always my 1st defense. Mites DO NOT like humidity, that will cause them physical harm and eradicate them. Among other methods, when they start to get thick as thieves. Compost top dressing also works as the 2nd line of defense and I would bet that it's effectiveness is in its hydrated nature? Then all the other crap that takes time away from your day.
I think alot of people tend to misdiagnose thrip damage as well. Will wind eradicate them? [Serious question]