Brown marmorated stink bug (Halyomorpha halys), Newark DE. August 2017.
An Asiatic species that made its way into the northeastern US just before the turn of the millennium, this stink bug has become an unwelcome addition to gardens, farms, and homes. It is highly polyphagous, meaning that, unlike many species of plant-feeding insects, it is capable of incorporating many species of plants in its diet, with its host plants ranging in the hundreds, including crop plants. The feeding from its mouthparts can damage and misshapen fruiting bodies (fruit, seeds, and nuts), which can ruin orchard and vegetable crops over time. During the fall, these stink bugs also will aggregate in homes or buildings to overwinter, becoming a nuisance for homeowners as well as the hotel industry.
Multiple generations a year; in captivity, three generations were observed for the Mid-Atlantic, and five generations have been reported southward.