Homeowners across Minnesota are reporting an influx of black‑and‑red boxelder bugs as temperatures warm in late summer. While the insects are harmless, their presence can be a nuisance, especially when they gather on sunny walls and emit an unpleasant odor if crushed.

Why the Bugs Are Out in Force

University of Minnesota Extension specialists say the recent warm, dry weather in August and September created ideal conditions for boxelder bugs to emerge in large numbers. The bugs seek warmth and shelter, often moving onto the sides of homes and into interior spaces as fall temperatures begin to drop.

Prevent Entry with Simple Home Repairs

The Extension office advises residents to seal any openings that could let bugs inside. Recommended steps include:

• Repair or replace damaged window and door screens.
• Fix cracks in roof, soffit vents, bathroom and kitchen fans.
• Seal gaps around utility wires, pipes, outdoor faucets, dryer vents, and other penetrations.
• Use caulk, expandable spray foam, copper mesh, or other appropriate sealants for larger spaces.
• Install door sweeps or thresholds on exterior doors and a rubber seal on garage doors.

If bugs do get inside, the best method is to remove them manually with a vacuum cleaner or a broom and dustpan. The Extension office cautions against routine insecticide sprays, noting they are generally ineffective and can harm beneficial pollinators. Only a severe infestation might warrant professional pest‑control assistance.

Sage: A Natural Repellent

Boxelder bugs dislike the natural chemicals found in sage. Residents can grow sage plants in their garden or use dried sage to create a DIY spray. To make the repellent, boil a handful of dried sage in water until the liquid darkens, strain, let it cool, and pour it into a spray bottle. Apply the solution to areas where bugs congregate, such as window frames, doorways, and sunny exterior walls.

Additional Tips

Boxelder bugs are attracted to buildings with strong southern or western exposure, so focusing seal‑up efforts on those sides can be especially effective. While the insects do not damage property, they can stain surfaces if crushed.

By combining proper sealing techniques with a simple sage spray, Minnesota homeowners can protect their homes from this seasonal nuisance while preserving the health of local pollinators.

Original reporting: News Talk 1340 KROC-AM – News and Talk – Rochester News Radio — read the source article.