I am going with thirps, heat and too much nutrients. I suggest lowering the temps if you can, flush for a couple of days and buying some MIghty from NPK, nothing else will kill the mites and the larva and leave you with something you can safely smoke. Lady bugs should be called Lazy Bugs, they dont do squat. When you start to feed again start at 1/4 -1/2 the strength your feeding now

Have you seen webs on your plants before? That is a bad thing and when this grow is over you have some work to do. Sorry I have Spider MIte PTSD, lol