Try looking closer at those black dots. If they can be discerned as two dots each then 2-spotted spidermites
— I think that ladybug larva would eat them unless it’s too big already. Find some babies or egg cluster To deploy junior patrol members to go after those little buggers.
— If you have seen some of those tiny yellow or light green Slug-like
hoverfly maggots*, They are good for detail work like this, too.
* Syrphid flies | NC State Extension Publications