The insects can be dislodged with high pressure water sprays from the garden hose. Leaf rollers roll leaves together, then web them in place.
Hand pick infested leaves.
Four-lined plant bug causes sunken, round, brown spots on the leaves. The injury is sometimes mistaken for a disease. Adult insects are yellowish-green with black stripes. Scale insects infest the stems and branches. Close inspection may reveal these insects crusted on the bark.