Apple aphid (Aphis pomi)
Spirea aphid (Aphis spiraecola)
Pest description and damage Several species of aphids may feed on the leaves, stems, flower buds, bark or root tissues of conifer and deciduous trees, shrubs, as well as other plants in landscapes. Aphids tend to be small (0.0625 to 0.125 inch long), oval to pear-shaped, soft-bodied insects with piercing-sucking mouthparts. Color varies (black, green, pink, yellow, mottled, striped, etc.), but most aphids tend to match host plant coloration. Aphids tend to feed in colonies and are found on the new or most succulent plant tissues. Feeding damage to shrubs, trees and mature plants is usually minor, but can compromise the vigor of the host. When aphid populations are high, leaf and shoot distortion can occur. Aphids produce honeydew, a sweet, sticky secretion that collects on underlying plant tissues and encourages growth of a black sooty mold.
For biology, life history, monitoring and management
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