Unfortunately, stink bugs have no natural enemies in this country, so there is nothing to keep their population growth in check. The Department of Agriculture is working hard to determine the insects weakness and vulnerabilities, but so far they have proven highly resistant to insecticides and their immediate goal is to formulate a list of recommendations for farmers before next growing season that will help limit crop damage.
For homeowners, little that can be done to prevent them from entering a dwelling except to caulk around all windows and seal all openings around doors as much as possible, not unlike what one would do the weatherproof a house.. If they get in your home, my advice is don't vacuum them up with your vacuum cleaner unless you want your whole house to smell like stink bugs. The Grouch's secret formula is a mixture of dishwashing liquid and water in a glass. Just knock the stink bugs into that mixture and they will die within 30 seconds, and you will spare yourself a lot of unpleasantness.