Stink Bugs

Stink bugs are a seasonal nuisance pest commonly found in Michigan homes, especially in the fall. While they do not bite, sting, or reproduce indoors, they frequently enter homes in large numbers seeking warmth and shelter. Effective stink bug control focuses on exterior prevention and exclusion rather than interior treatments.

Brown Marmorated Stink Bugs

Overview
Brown marmorated stink bugs are the primary stink bug species encountered in Michigan homes. They are most noticeable during the fall as they attempt to enter structures to overwinter.

Behavior
Stink bugs spend the warm months outdoors feeding on vegetation. As temperatures drop, they gather on sun-exposed sides of homes and enter through small gaps and openings. Once inside, they remain dormant and may reappear during warmer winter days.

How to Identify Them
Stink bugs are shield-shaped insects, typically brown or mottled brown, about half an inch long. When disturbed or crushed, they emit a strong, unpleasant odor.

Why They’re a Pest
Although they do not cause structural damage, stink bugs can appear in large numbers and become a major nuisance. Their odor, visibility, and tendency to emerge indoors during winter make them especially frustrating for homeowners.

Common Stink Bug Entry Points

Overview
Stink bugs rely on small structural gaps to access homes, often entering unnoticed until large numbers appear indoors.

Behavior
They crawl into protected areas during fall and remain hidden in wall voids, attics, and upper levels of the home.

How to Identify Entry Areas
Common entry points include:

• Gaps around windows and door frames

• Soffits, fascia, and siding seams

• Attic vents and gable vents

• Utility penetrations and exterior trim joints

• Areas exposed to direct sunlight, especially upper walls

Why Entry Points Matter
Even small gaps can allow repeated infestations. Without addressing exterior access points, stink bugs will continue to enter each season.

Why Interior Treatments Aren’t Effective

Overview
Interior treatments are often requested for stink bugs but rarely provide long-term results.

Behavior
Stink bugs do not nest or reproduce indoors and are often hidden in wall voids where treatments cannot reach them.

How Control Is Commonly Misapplied
Spraying inside typically kills only visible bugs and may cause others to emerge from hiding. This can increase sightings rather than reduce them.

Why Exterior Prevention Works Best
Exterior perimeter treatments, combined with sealing entry points, prevent stink bugs from entering in the first place. This approach is far more effective and avoids unnecessary indoor pesticide use.

Dealing With a Stink Bug Problem?

Stink bug control is about timing, prevention, and proper exterior treatment. If you’re seeing repeated activity or want to prevent issues before the next season, use the contact form and we’ll explain the best approach for your home.