Black Flag Roach Killing Chalk
One of the most unique ways to eliminate roaches is Black Flag Roach Killing Chalk. You simply draw a line of chalk over known roach trackways, like where molding connects to a wall or floor, and when a roach walks onto the chalk, it will receive a lethal dose of the synthetic pyrethrin active ingredient. You can use this chalk to draw a barrier around foodstuffs or water supplies, forcing roaches to walk over it when they want to eat or drink. Once they cross the line, they'll never cross it again. It lasts for up to 8 weeks, is easy to apply and can be used under cabinets, around pipes, on baseboards and virtually anyplace where roaches travel.