Stink Bug Control & Exclusion in NEPA

How to Identify Stink Bugs — and Why DIY Falls Short

The brown marmorated stink bug is shield-shaped, about three-quarters of an inch, marbled brown-gray, with distinctive white bands on the antennae and alternating light edges along the abdomen. It is often confused with native brown stink bugs and squash bugs, but the banded antennae give it away. They do not reproduce indoors — every bug in your house flew in from outside in the fall, which is why exterior timing is everything.

The brown marmorated stink bug is an Asian import that found Pennsylvania very much to its liking — Penn State Extension tracks it as one of the state's signature nuisance invaders, and NEPA is squarely in its range. The insects are harmless to people and structures: they do not bite, breed indoors, or damage the home. The problem is sheer numbers. On warm September afternoons, hundreds gather on sun-warmed siding and then slip into attics, wall voids, and window frames to overwinter.

Once inside, they are difficult to remove. Vacuuming helps but risks the odor that gives them their name, and crushing them can stain surfaces. On warm midwinter days, confused individuals emerge around lights and windows all season long. The only reliable strategy is prevention: stop them at the exterior before they get in.

Our stink bug program is a timed exterior service. A residual barrier applied to siding, eaves, and entry points in early fall intercepts the invasion as it happens, and we combine it with practical exclusion — screening attic and gable vents, weatherstripping, sealing window-frame gaps. Homes with heavy prior-year pressure benefit most: if your attic was full of stink bugs last winter, this fall is the time to break the cycle.