Woolly Aphid

Scientific Name: Eriosomatinae (Subfamily)

Order & Family: Order: Hemiptera, Family: Aphididae

Size: 1 to 7 millimeters in length.

Woolly Aphid

Natural Habitat

Commonly found on the leaves and branches of specific host plants (such as apple, ash, beech, or oak trees) where they produce white, waxy secretions.

Diet & Feeding

They feed on plant sap by piercing the bark or leaves of host plants with needle-like mouthparts.

Behavior Patterns

They produce a thick, white, waxy fiber for protection against predators and moisture loss. They often form large colonies and may have complex life cycles involving alternating between different host plant species.

Risks & Benefits

Generally harmless to humans but considered a garden pest. Heavy infestations can cause leaf curling, yellowing, and stunted growth in plants. Their sticky waste (honeydew) can lead to the growth of sooty mold.

Identified on: 1/30/2026