The brown marmorated stink bug, an invasive insect species from Asia, is seen in a trap on the Catoctin Mountain Orchard June 17, 2011, in Thurmont, Maryland. They're a nuisance," he said. Still, Fredericks and Krawcyzk both said that there are places that stink bugs can slip through the cracks to get in. Their foul-smelling odor and penchant for plants, however, make them a nuisance to homeowners everywhere. "As the weather continues to cool, and the days continue to shorten, those stink bugs will find their way into cracks and crevices around homes," Fredericks said. NPMA chief entomologist Jim Fredericks told Newsweek how the stink bugs' life cycle typically works, and how the warm weather will be reflected this fall. According to the NPMA, stink bugs eat fruit, leaves, and stems, damaging and destroying crops. If there's utility penetrations, like where the electric line goes into the house or the air conditioning lines go through the siding. They feed themselves on leaves, fruits, flowers, crops, vegetation, and other insects like caterpillars. The brown marmorated stink bug, an invasive insect species from Asia, is seen in a trap on the Catoctin Mountain Orchard June 17, 2011, in Thurmont, Maryland. As spring temperatures begin to warm, the southern green stink bug moves out of the winter cover and begins feeding and oviposition. They're losing the value of their crop, which eventually will have impact on the economic values of the whole production," Krawcyzk said. "One of the things that can be done-and it's a really common sense approach-is to try to seal up obvious entry points. Fredericks said that this uptick will largely be reflected in the Mid-Atlantic region. Stink bugs usually find themselves man made structures to keep warm throughout the cold winter after feasting through the end of the summer. The green stink bug's color is typically bright green, with narrow yellow, orange, or reddish edges. From the adults emerging in the spring, laying eggs, those eggs developing as nymphs to become adults that enter homes in the fall," Fredericks said. They still do not spread any disease or anything like this. Krawcyzk said that he tracks the stink bugs in regards to farmers, who are most affected by the bug. It is a large, shield-shaped bug with an elongate, oval form and a length between 13–18 mm. "Because of this warm weather, we would expect the populations to be larger as we enter the autumn months.". Getty/PAUL J. RICHARDS/AFP This year, because of how warm it was, we have two generations," Krawcyzk said. They are not harmful to humans or pets. No, stink bugs do not bite and are not poisonous, but they can fly. "We've seen from the very beginning of the season that the numbers in the traps that we use for monitoring at different locations, mostly around the orchards, were much higher this year than in the past," he said. While some stink bugs will likely make their way inside regardless, there are a few steps that can be taken. Most stink bugs found in America are about 2 cm long. A recent study from Penn State Extension Tree Fruit Entomologist and Research Professor Greg Krawcyzk, reported by Penn Live, suggests that this year may be a particularly pesky year with stink bugs. So even though sealing the obvious entry points is helpful, there's still the likelihood that a few will get in. "We got a very hot summer, which is similar as it was in 2010 or 2012, and because of this, we got one additional generation of the stink bug. Those are places that the typical consumer can maybe seal up to try to keep these bugs from entering.". It can be differentiated from the species Nezara viridula by its black outermost three antennal segments. "If you're concerned that your home has a history or your neighborhood has a history to call a pro to come out and at least help you to develop a control plan that might be proactive," he said. Stink Bug Bite. "Brown marmorated stink bugs, say in Pennsylvania for instance, in a normal year will typically have one population cycle during that summer, and that's just because, based on the temperature and the conditions there, they typically will be able to get through one population. A normal year, we may or may not have two generations. "From New York to the Carolinas is where we would expect to see populations of stink bugs on par or larger than in previous years," he said.