PF Harris 32 oz. Ready-to-Use Bed Bug Black. It kills even the toughest pyrethroid resistant bed bugs. This premium formula liquid spray effectively eliminates bed bugs and their eggs, breaking the lifecycle. Apply as a spot treatment to cracks, crevices, and harborages where evidence of bed bugs occurs, including bed frames, box springs, dressers, closets, carpet edges, wall moldings, behind headboards, pictures, and luggage. Active ingredients: Imidacloprid. For indoor use.