The samples that have come into the Extension Office have had a high infestation of insects. Plant bugs and aphids can reach high levels and cause the leaves to curl. The pests will not kill the trees, but earlier control will improve the looks of the trees. Insecticide sprays when the leaves start to curl will give control. A good weekly spraying with a garden hose will also remove many of the pests.
Ladybugs also increase and provide some control when aphids are present.