Removing boxelder trees from the premises may help reduce bug numbers. However, since the adults are good flyers, even homes at a considerable distance from host trees may be invaded. When young bugs are observed on these trees, spraying will reduce the number reaching maturity. This is one of the most effective methods of reducing migrations later in the season. When bugs congregate near foundations and sides of the home, use residual sprays such as chlorpyrifos or diazinon.
Thorough coverage is essential for adequate control.
Sprays may need to be repeated as more boxelder bugs arrive. Non-chemical alternatives include insecticidal soaps, hedge apples or hot, soapy water. Caulk all openings around windows and doors and in walls, siding or foundations. The best method of control once insects have entered the home is to use a vacuum cleaner. If large numbers of boxelder bugs enter the home, a household aerosol spray pyrethrins can be used.