Brown Marmorated Stink Bug
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Overview
The Brown Marmorated Stink Bug was unintentionally introduced to the Unites States from Asia sometime between 1996 and 1999 in Allentown, PA. Indoor Stink Bug activity is greatest from October to May, when the weather temperatures drop and their natural food sources are no longer available (fruits and seeds).
Although the sight of Stink Bugs in your home might seem alarming, they are actually considered a nuisance pest and do not cause any type of structural damage, nor do they reproduce in your home.
Stink Bugs enter structures as a survival technique. For Stink Bugs to survive the colder months, they seek the warmth found within the insulated walls of buildings. They enter through tiny gaps around windows, doors, vents, chimneys, etc. Caulking around any gaps in these areas may help reduce indoor Stink Bug activity.
Chemical applications to the exterior of the structure can also be helpful in reducing activity. Applications are most effective when applied in the months of September and October. Several treatments may be required as the residual lifespan of the chemicals are only effective for a few weeks.
Biology
All Stink Bugs are approximately 17 mm (5/8” inch) long with a ‘shield’ shaped body that is brown-grey in color. There are five immature stages of Stink Bugs, ranging in size from 2.4 mm to 12 mm in length. During these five stages, body coloring ranges from yellow-red to off-white with red spots. The adult stink bugs are usually brown, grey, and have patterns and splotches of green-brown on their bodies.
