A light infestation may also be controlled by wetting and removing scale insects with a swab that has been dipped in alcohol. Use a swab made from a small thin stick and a bit of cotton to dip in the rubbing alcohol. The plants may also be sprayed or dipped using the insecti- cide malathion. Follow the manufacturer's directions for recommended rates. Several applications at intervals of 3 to 4 weeks may be required to kill scale insects.
Some plants are sensitive to the insecticide malathion.
Be sure to read and follow the manufacturer's directions carefully when using any insecticide. Insecticidal soap is also recommended for scale control. Follow the manufacturer's directions for application.