Stink Bug Control in Ellicott City, MD
If you've lived in Ellicott City a while, you know the scene. A warm afternoon in late September, and the south wall of the house is covered in shield-shaped brown bugs. A week later they're on the curtains, in the light fixtures and buzzing into lamps at night. Stink bug control in Ellicott City is a fall ritual for a lot of households.
These are brown marmorated stink bugs, an insect from Asia that spread across the Mid-Atlantic and became a real nuisance in Maryland around 2010. The University of Maryland Extension counts them, along with Asian lady beetles and boxelder bugs, among the usual fall intruders here. They don't bite, they don't chew wood and they don't breed inside over the winter. What they do is pile into wall voids and attics by the hundreds and make a smell when you crush one.
How the stink bugs get in, and the walls they pick
As the days shorten, stink bugs look for a sheltered spot to wait out the winter. Out in the woods that's under bark or in a dead tree. Next to a house, it's the warm siding. They gather on the sunny south and west walls, then crawl into whatever gaps they find: around window trim, under loose siding, at the soffits, through attic vents, around the cable line and the AC lines. Houses near the woods, which in Howard County is most of them, get more because there are more bugs nearby to start with.
Old and new houses both get them, just through different gaps. In the stone and frame houses near the historic district, old window sashes and gaps at the roofline let them in. In big newer homes out in Clarksville and the newer Turf Valley streets, it's often the ridge vent, gaps around the many window and door openings, and the space where siding meets stone veneer.
A late-summer stink bug treatment and sealing before October
Timing does most of the work. A tech can treat the outside walls in late August and September, before the bugs move in, focusing on the sunny walls, window and door trim, the eaves and the roofline. Once they're already inside the walls, there isn't much anyone can spray that helps. Sealing is the other half, and UMD Extension points to the same places a tech will: weather-stripping on doors and windows, vent covers, and where pipes and wires enter the house.
The price comes from the company and depends on the size of the house, how many stories it has, how much sealing it needs and whether the attic is easy to get into. The same gaps let mice in, so many people pair this with mouse exclusion before the first frost, or fold it into a seasonal plan for the whole house.
- Screens on attic, gable and soffit vents
- Fresh caulk around window and door trim
- Sealing where siding meets the foundation or stone veneer
- Door sweeps and window screens that actually fit
Once they're inside: vacuum, don't squash
For the ones wandering around the house, a vacuum is your friend. Empty it outside right away, or use an old knee-high stocking inside the hose so you can tie them off and toss them. Don't squash them on curtains or walls. The smell lingers and can stain. Some people drop them into a jar of soapy water, which works fine. Bug bombs and indoor sprays don't do much against bugs tucked into the walls, and they leave residue you'd rather not have around kids and pets.
Expect a few to show up all winter. On a mild January afternoon the attic warms up, the bugs wake and wander toward the light. That doesn't mean new ones are getting in. It means the batch from October is still there. Our stink bug guide for Ellicott City homes goes through the season month by month.
Questions We Get
When should I call about stink bugs?
Late August or early September is ideal. By mid-October most of them are already in the walls.
Are stink bugs harmful to people or pets?
No. They don't bite or sting and they don't damage the house. The trouble is the smell and the sheer number of them.
Are the orange beetles on my windows the same thing?
Those are probably Asian lady beetles, another fall invader here. They gather the same way and the same sealing helps.
Serving Old Ellicott City, Dunloggin, Turf Valley, Valley Mede, St. Johns Lane, Columbia, Catonsville, Clarksville, Woodstock and Marriottsville, Elkridge.
