On a sunny fall day, they can be found by the thousands on the sunny side of the house. This causes two kinds of problems:
1. a cosmetic problem; and
2. an indoor problem as they come in doors and windows. But, if they are not treated during this VERY NARROW window of opportunity, they will get into the walls and become a problem all winter long.
It’s best to call Barrington Exterminating when you start to see boxelder bugs on the outside of your house in the fall, before the window of opportunity closes.