Boxelder bug extermination
Typical seasonal South Shore invasion. Preventive exterior treatment and entry-point sealing — no more hundreds of bugs on the façade.
The boxelder bug is the typical fall invasion on the South Shore — especially in zones with mature maple trees like Saint-Lambert, Boucherville and Old Longueuil. They seek warm overwintering sites and often find the sunny exterior of homes. Though they don't bite or damage structure, they enter by the hundreds through walls, windows and attics — re-emerging in spring. Treatment combines exterior eradication and physical exclusion.
Client preparation guide — boxelder bugs
Signs of infestation
How to tell if you have them
These indicators appear first. Visible presence during the day almost always signals an established infestation.
- Hundreds of black bugs with red markings on sunny walls
- Dead bugs accumulating on interior windowsills
- Mass activity in September-October then again in April
- Red-brown stains on curtains or interior walls (droppings)
Why act
Risks and consequences
- 1No major health risk (harmless species)
- 2Stains on fabrics and walls
- 3Psychological stress from mass proliferation
- 4If they establish in attic, hundreds re-emerge inside in spring
Our treatment
Professional method, structured protocol
Exterior residual treatment applied on sunny façade and around windows in September (before migration) or April (after emergence). Inspection and marking of entry points — cracks, soffits, exterior outlets, vents — with caulking recommendations you can apply yourself. For attic infestations, targeted interior treatment with low-toxicity products.
Prevention
Prevent their return
- Seal cracks and façade seams in spring
- Install fine mesh screens on vents
- Check window seals in August
- Trim maple branches touching the house
- Annual preventive treatment in September
Local service
Boxelder bugs extermination in your city
Free quote
Free quote in 60 seconds
Describe your situation — reply in under one business hour.
- Response within one business hour
- No obligation, no assessment fee
- Transparent estimate before any treatment
- Certified IPM method, Health Canada approved products
Frequently asked questions