If your leaves look dull and are stippled with white dots then you most likely have spider mites. They love nice, warm, still spots so are usually found on plants, particularly rhodoendrons and roses, next to the house or under the eves.
To get rid of spider mites simply hose them off with a strong stream of water and spray the plant with Neem, an organic oil sold at Awapuni Nurseries.
Or spray with a natural insecticide.