Young leaves are curled, distorted, and yellow. Small pale-green to black, soft-bodied insects cluster on leaves and stems. A shiny, sticky substance may coat the leaves. Ants may be present.
Apply an insecticide labeled for this pest, following instructions on the label. Mites are difficult to control because they reproduce so rapidly. Hose down plants with a high-pressure nozzle every few days to knock off webs and mites.