The twigs and branches are covered with brown, turtle-shaped, crusty bumps 1/3 inch in diameter. Leaves turn yellow and may drop. A shiny, sticky substance, sometimes covered wtih black mold, coats the leaves. Branches die back, starting at the bottom of the tree. The tree may be killed by severe infestations. Lady beetles may be feeding on the scale.
Apply an insecticide labeled for scales, following label directions.