spider mites.
a million ways to treat her. i personally use einstein oil (higher quality neem oil).
neem oil will not kill the mites, but it will keep them from reproducing. so once you spray, wait a few days for the eggs to hatch and spray again. then, for good measure, wait a few more days and spray again. i do a 3/5/7 day cycle to keep killing the new mites as they hatch.
mites breed quickest in hot temps, dry conditions, and no wind. the colder, wetter, and windier it is, the harder a time they will have reproducing.
when spraying with neem, do not spray in direct sunlight. wait until the sun is almost down or an hour or two before the sun comes up and spray. get the bottom and top side of every leaf.
the key to battling mites is to understand their life cycle and breeding conditions. it is a fight you can never truly win via full eradication, it is best to be preventive and proactive.
best of luck.