Brown Marmorated Stink Bug
Halyomorpha halys
Scientific illustration for identification purposes
Overview
The brown marmorated stink bug is an invasive Asian species that has become a major nuisance pest. They congregate on buildings in fall and release a pungent odor when disturbed or crushed. They are also a significant agricultural pest.
How to Identify
- Shield-shaped body 1/2 to 3/4 inch
- Mottled brown color
- White bands on antennae
- White triangular markings on abdomen edge
- Distinctive "stink" when crushed
Behavior
Stink bugs congregate on sunny building surfaces in fall seeking overwintering sites. They release a foul-smelling chemical when disturbed. They do not bite or reproduce indoors.
Habitat
Feed on many fruits, vegetables, and ornamental plants outdoors. In fall, they enter structures to overwinter in wall voids and attics.
Diet
Feed on over 100 plant species including fruits, vegetables, and ornamentals. Cause significant agricultural damage.
Reproduction
One generation per year in most areas. Adults overwinter and emerge in spring to mate. Eggs laid on plant leaves.
Distribution in the Southern U.S.
Established and spreading throughout Texas, Oklahoma, Louisiana, and Mississippi.
Regional Notes
This invasive species is expanding its range in the South. Agricultural impacts and home invasions are increasing.
Signs of Infestation
- Shield-shaped brown bugs on sunny walls
- Bugs entering through gaps in fall
- Foul odor when bugs are disturbed
- Dead bugs accumulating in window areas
- Bugs active on warm winter days
Prevention Tips
- Seal gaps around windows and doors
- Install door sweeps
- Repair damaged screens
- Caulk around utility penetrations
- Use a vacuum to remove bugs (do not crush)
- Install exclusion screens on attic vents
When to Contact a Professional
Contact a professional for large fall invasions or for barrier treatments before bugs congregate. Avoid indoor pesticide sprays as they do not prevent entry.
Romex Pest Control provides professional brown marmorated stink bug control services across Texas, Oklahoma, Louisiana, and Mississippi.
Learn about our brown marmorated stink bug control servicesFrequently Asked Questions
Why do stink bugs smell?
Stink bugs have glands that release a pungent chemical as a defense mechanism. This deters predators. The smell is released when they are disturbed or crushed.
Will stink bugs hurt me?
Stink bugs do not bite, sting, or transmit diseases. They are nuisance pests. Some people may experience mild allergic reactions to the defensive chemicals.
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