PestDex Details
Multicolored Asian Lady Beetle
Harmonia axyridis
flyer
Fall home invader similar to stink bugs. Beneficial outdoors (eats aphids) but nuisance indoors.
How to Identify
- •Orange to red, ¼ inch, dome-shaped
- •Variable black spots (0–19)
- •Black "M" or "W" on white pronotum behind head
- •Clusters in sunny window frames and attics
Where Found
Overwinters in wall voids, attics, window frames. Feeds on aphids outdoors spring–fall. MD/VA/DC homes near agricultural areas see heaviest pressure.
Seasonality
Enters homes September–October. Emerges March–April on warm days.
Health & Property Risk
Nuisance and odor. Bites occasionally (pinch, not sting). Secretes yellow fluid that stains fabrics. Can trigger allergies in sensitive individuals. No structural damage.
Prevention Tips
- •Seal cracks around windows and siding in August
- •Repair window screens
- •Caulk gaps around trim and utilities
- •Vacuum up (dispose of bag outside)
- •Light traps can reduce numbers
Treatment Notes
Perimeter spray in late summer before migration. Vacuum removal indoors. No indoor residual needed — they don't breed indoors. Avoid crushing (stains).