Brown marmorated stink bugs (Halyomorpha halys) are an invasive and difficult to manage pest species that were first identified in Allentown, Pennsylvania in 2001 - although they had probably arrived here several years earlier - and it is thought that they first came to the United States in shipping containers arriving from Asia.
Besides its pungent odor, the brown marmorated stink bug is most notorious for having become an annual nuisance for home owners for its habit of gathering in large numbers on the sides of houses and buildings in the late fall, and entering these structures in order to survive the winter.
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While it share some traits with some native stink bug species across the United States, the brown marmorated stink bug features some distinctive features that make it easy to identify.
The picture below should help in differentiating brown marmorated stink bugs from other native United States stink bug species:
Look for the characteristics below when identifying the brown marmorated stink bug:
The brown marmorated stink bug is native to China, Taiwan, North & South Korea and Japan.
They are strong fliers and can fly to a new habitat - more than 1 mile a day - or may even hitch a ride in shipping containers or on cars.
Since becoming established in Pennsylvania, they have spread throughout the Mid-Atlantic States and they have also been spotted in many southern and midwestern states.
The map below a clear indication of the current distribution of brown marmorated stink bugs throughout the United States and the level of stink bug severity in U.S. states.
Brown marmorated stink bugs are also a very serious pest threat to the agricultural industry in North America as during its immature and adult life stages it feeds on a large number of crops like: