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These triangle-shaped bugs are common in fall when they collect on the sunny side of houses. They typically start gathering in large numbers in October, and then move indoors in the weeks following as temperatures start to drop. They will become active again in spring.
Stink bugs spend spring and summer feeding on plants. They have piercing-sucking mouthparts and feed on a variety of flowers and shrubs. They tend to fly toward warm surfaces on the foundation wall or siding in fall. Stink bugs do not live or reproduce in homes. They migrate indoors to spend the winter.
The early signs of a possible problem are a few stink bugs resting at doors or windows beginning in the fall. There may be only a few of them, but more may follow in the coming weeks.
[accordion clicktoclose=true][accordion-item title="How to Eliminate Stink Bugs"]Use a liquid spray insecticide product labeled for indoor/outdoor use to kill individual bugs. Spray around window sills and door frames inside and out where stink bugs tend to enter and exit. You may also find it helpful to spray exterior parts of your home where you find stink bugs gathering. Contacting the bugs directly with spray will be effective but is not necessary for elimination. Many of today's insecticides, including a variety of Harris products, are water-based with the benefit of being odorless and non-staining. However, water-based insecticides work after they dry, meaning that the bug tends to die 30 minutes to several hours after making contact with the treated area.[/accordion-item][accordion-item title="How to Prevent Stink Bugs"]Preventing stink bugs from gathering in large numbers may be difficult. Spraying around exterior doors and siding on the sunny side of the house may help to prevent entry. Spraying the exterior siding may have limited residual based on rain and moisture levels, especially on siding that is exposed to afternoon sun.[/accordion-item][/accordion]