"Spider" mitesHow can I tell if I have strider mites
You'll see a bunch of white dots on the top side of the leaves, and little black dots on the bottom of the leaves. The mites suck the juices from the bottom of the leaves, leaving the telltale white marks on top.
You'll also start seeing tiny spider webbing show up on various parts of the plants as the infestation gets worse. The white dots and webbing is pretty much a guarantee you've got spider mites.