Woolly Aphid

Natural Habitat

Found on various host plants, typically hardwood trees (e.g., apple, elm, alder, maple, pine) and shrubs. Often seen on the underside of leaves or on stems, sometimes on roots.

Diet & Feeding

Plant sap. They are sap-sucking insects that feed on the phloem of their host plants.

Behavior Patterns

Woolly aphids are known for producing a waxy, cotton-like covering that protects them from predators and pesticides. They often live in colonies and can reproduce rapidly, with some species exhibiting complex life cycles involving alternating host plants and parthenogenetic reproduction (asexual). They tend to move slowly.

Risks & Benefits

Risks: Can cause damage to host plants, including stunted growth, leaf curl, galls, and a sticky residue called honeydew (which can lead to sooty mold growth). Some species are agricultural pests. Benefits: Can serve as a food source for other insects like ladybugs and lacewings (natural pest control agents). Their presence can indicate stress in plants or attract beneficial insects.

Identified on: 9/19/2025