i heard lady bugs eat allot of insects that enjoy our favorite plant. so that might help you out a bit. from the picture it looks like it could be spider mites but from your description it doesnt quite sound like that. i have been praying my plant with neem seed oil diluted in water with the smallest drop of soap to help disperse the thick oil in the water. it helps kill some insects and also helps prevent insects from living on your plant. from what i know neem seed oil used on a plant in this method is safe.