Rita writes
Tempo SC Ultra is labeled for boxelder bugs and gives specific instructions for treating them. Apply directly to boxelder bugs that have congregated around doors and windows and similar areas where they may enter structures. Apply perimeter treatment as described above. For best results, treat infested trees early in the season. The treatment should begin before temperatures drop and pests start searching for places to harbor for the winter. Once the bugs have moved into your attic to overwinter you will have limited results with sprays as they will hide in cracks and crevices there and getting to all of these is rare. Your first treatment should be in August, before the weather begins to cool, and continue through November or until the first frost of the Fall. The best treatment for overwintering pests is preventative treatment.
Answer last updated on: 10/26/2017
