Boxelder Bug
Boisea trivittata
Identification
Boxelder bugs are flat, black insects with distinctive red-orange markings. They feed on boxelder and maple tree seeds. In fall, they congregate on sun-warmed walls in massive numbers before entering homes to overwinter. While harmless, they stain surfaces when crushed and are a major nuisance.
Treatment Cost
$150 - $300
Urgency Level
Low
Commonly Found In
South-facing walls, windows, around maple trees, attics
Recommended Treatment
Professional exterior perimeter spray in early fall. Vacuum up indoor bugs (do not crush — they stain). Residual insecticide application around entry points, windows, and foundation.
Prevention Tips
Seal cracks and gaps before fall, repair window screens, consider removing female boxelder trees near the home, schedule preventive exterior treatment in September.
Frequently Asked Questions
How do I identify a boxelder bug?
Boxelder bugs are flat, black insects with distinctive red-orange markings. They feed on boxelder and maple tree seeds. In fall, they congregate on sun-warmed walls in massive numbers before entering homes to overwinter. While harmless, they stain surfaces when crushed and are a major nuisance.
How do I get rid of boxelder bugs?
Professional exterior perimeter spray in early fall. Vacuum up indoor bugs (do not crush — they stain). Residual insecticide application around entry points, windows, and foundation.
How can I prevent boxelder bugs?
Seal cracks and gaps before fall, repair window screens, consider removing female boxelder trees near the home, schedule preventive exterior treatment in September.
How much does boxelder bug treatment cost?
The average cost of professional boxelder bug treatment ranges from $150 to $300 in Quebec, Canada.
Where are boxelder bugs commonly found?
South-facing walls, windows, around maple trees, attics