Heavy infestations reduce the amount of growth produced by the plant.
Use sprays of Sevin, acephate, malathion or rotenone. The insects can be dislodged with high pressure water spray from the garden hose. Oblique-banded leaf roller rolls and webs the leaves together. Hand pick infested leaves or spray with acephate or Sevin. Inspect the stems of unhealthy-looking shrubs for scales.