Woolly Aphid

Scientific Name: Eriosomatinae (subfamily)

Order & Family: Order: Hemiptera, Family: Aphididae

Size: 2 to 4 millimeters (0.08 to 0.16 inches) long.

Woolly Aphid

Natural Habitat

Found on various host plants including trees (apple, elm, beech, hawthorn) and shrubs. They often cluster on twigs, branches, or roots.

Diet & Feeding

Feed on plant sap (phloem) using piercing-sucking mouthparts, often causing leaf curling or galls.

Behavior Patterns

They produce a white, waxy, cotton-like filament covering for protection against predators and desiccation. They are slow-moving and often form dense colonies.

Risks & Benefits

Benefits: None significant to humans. Risks: Can be minor garden pests by weakening plants, causing unsightly galls, and producing sticky honeydew which can lead to sooty mold growth; generally harmless to humans.

Identified on: 1/5/2026