Pest description and damage Hawthorn aphids are yellow-green to pinkish, soft-bodied insects typically found on the leaves in the spring. Aphid feeding causes young leaves to curl tightly and turn purplish. Older leaves are crinkled and deformed. Aphid feeding produces large amounts of honeydew, a sweet, sticky material that may attract ants or become covered with a dark growth of sooty mold.
For biology, life history, monitoring and management
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