The best control is to remove plants from the soil, wash the roots and re-pot in sterilized soil. Mealy bugs are tiny, white insects that look like tufts of lint. Bad infestations will cause stunted growth and eventually kill the plant. They're found on the underside of leaves and where the leaves branch off from the main stem of the plant. Use the same controls as for aphids.
Mites are generally too small to be seen without a magnifying glass.
They are brownish in color and look like dust. Mites leave foliage speckled and yellow. Leaves turn brown and fall off and new growth will be stunted with deformed buds. Spider mites produce webs on the leaves to hide and feed under. Plants growing in hot, dry locations are most susceptible.