No Contracts Ever — Pay only for what you need. Cancel anytime. No long-term commitments. Pricing based on your home's square footage.

Boxelder Bug Control in Waukesha County, WI

Boisea trivittata

Low Threat

Boxelder bugs are a signature Wisconsin nuisance pest, congregating on sunny sides of buildings in enormous numbers during fall. Named after boxelder trees (Acer negundo), which are abundant throughout Waukesha County, these black-and-red insects seek warm overwintering sites in wall voids and attics. While harmless, their sheer numbers and staining potential make them a top fall pest concern.

Signs of Boxelder Bugs

  • Masses on sunny walls in fall
  • Red-and-black insects on windows
  • Insects emerging on warm winter days
  • Staining on curtains and walls

Common Locations

Sunny exterior wallsWindow framesAtticsWall voidsSiding gaps

Prevention Tips

  • Seal cracks before fall
  • Replace damaged screens
  • Caulk around windows
  • Consider removing boxelder trees
  • Exterior perimeter treatment in September

Wisconsin Climate Factors

  • Cooling fall temperatures trigger migration
  • Sunny south-facing walls attract swarms
  • Warm winter days activate dormant bugs

Seasonal Activity

Spring
6/10
Summer
3/10
Fall
10/10
Winter
4/10

Boxelder Bugs FAQ – Waukesha County

Why are boxelder bugs covering my Waukesha County house?

Boxelder bugs swarm south-facing walls in fall seeking winter shelter. They're attracted to heat radiating from your home. Professional perimeter treatment before their migration is the most effective prevention.

Are boxelder bugs harmful in Waukesha County?

Boxelder bugs don't bite or cause structural damage, but they stain surfaces with their excrement and can invade in overwhelming numbers. They also emit an unpleasant odor when crushed.

Need Emergency Pest Service?

Don't wait when safety is at risk. PIP's emergency team responds same-day across Waukesha County.

Call Now: (262) 893-5271