Entity scope
This profile covers Aphididae. Species, color, host range, winged forms, and life cycles vary.
Quick identity
- Scientific scope
- Aphididae
- Entity scope
- Family-level profile
- Broad form
- Small, soft-bodied, often pear-shaped insects; adults may be wingless or winged.
- Useful clue
- Paired cornicles near the rear of the abdomen are useful, though difficult to see in casual photos.
- Typical context
- Tender shoots, buds, stems, leaf undersides, bark, or roots on many plant families.
- Identification limit
- One organism, symptom, or photograph is not enough for reliable species certainty.
Key characteristics
- Small, soft-bodied, often pear-shaped insects; adults may be wingless or winged.
- Paired cornicles near the rear of the abdomen are useful, though difficult to see in casual photos.
- Host and habitat context matter: Tender shoots, buds, stems, leaf undersides, bark, or roots on many plant families.
- Color, size, and plant injury can overlap with unrelated organisms; preserve uncertainty when views are incomplete.
Life stages
01
Nymph
Smaller wingless stage resembling the adult; molts leave pale shed skins.
02
Adult
Wingless or winged depending on species, season, crowding, and host.
Where it is found
- Tender shoots, buds, stems, leaf undersides, bark, or roots on many plant families.
- Many aphids cluster while feeding; some populations reproduce rapidly and produce sticky honeydew.
- Regional range and seasonal timing affect which species are plausible.
Behavior and activity
- Many aphids cluster while feeding; some populations reproduce rapidly and produce sticky honeydew.
- Visible abundance can change with weather, plant condition, natural enemies, and life stage.
- Plant damage without the organism present does not establish the cause.
Diet and resources
- Plant or habitat relationship: Tender shoots, buds, stems, leaf undersides, bark, or roots on many plant families.
- Resource use varies within broad groups and should not be generalized beyond this entity scope.
Associated signs
Leaf curling, yellowing, honeydew, sooty mold, and shed skins may accompany colonies. These signs also have other pest and non-pest explanations.
Common lookalikes
Powdery winged adults and flattened immatures occur under leaves.
Some produce honeydew but are flatter or shell-like.
More wedge-shaped sap feeders with strong jumping behavior.
Why it matters
Identity and impact are separate questions
Most aphid activity causes limited plant harm, while heavy feeding or virus transmission can matter on susceptible plants. Presence alone does not predict plant loss.
- Do not infer the responsible species from damage alone.
- Assess current activity, affected area, plant health, and change over time before deciding whether action is warranted.
Management direction
- Confirm aphids on the affected plant and inspect new growth and leaf undersides.
- Consider plant tolerance and natural enemies before intervening.
- Use host-specific IPM if populations and fresh damage continue to increase.
Have a pest photo to check?
Start a new photo identification. This Profile gives comparison context; it does not transfer certainty or diagnose your image.
Identify a photoReviewed guidance and sources
Last reviewed August 2026. Sources support the claims listed with them; their limits remain part of the review.
- University of Minnesota Extension — Aphids in home yards and gardens
Supports: Body form, cornicles, host sites, honeydew, plant effects, and natural enemies.
Does not support: Species identity or prognosis from one colony.
Scope note: North American garden and landscape context; species, hosts, seasons, and local guidance vary.
- UC IPM — Aphids
Supports: Family biology, damage, honeydew, virus context, and IPM direction.
Does not support: A universal threshold or species diagnosis from color.
Scope note: North American garden and landscape context; species, hosts, seasons, and local guidance vary.