Andy Michel
Brown Marmorated Stink Bug
With the cooler night temperatures, shorter day lengths and maturing crops, there is not much left for brown marmorated stink bugs to do except get ready for winter. The “marmies” prefer to spend the winter in homes or buildings, where they tend to be insulated from the cold temperatures. They overwinter as adults, and then emerge the following spring and lay eggs. Unfortunately, the marmies also overwinter in large numbers, which sometimes causes concerns from homeowners. The marmies are not harmful to people nor cause any damage to buildings, but many do not like their presence and odor (especially when handled). A simple way to remove the stink bugs is to just collect them in a plastic bag or jar and put them in the freezer for a day or so to kill them. You can also vacuum them and toss them outside (do this quickly otherwise they may crawl out of the vacuum if not immediately killed). We do not recommend insecticides in the home, mainly because more will continue coming in, and just their presence does not justify an application. Like their name says, they do stink and can also leave a stain on skin or fabric, so be careful when handling.
Source : osu.edu