Raid Double Control Indoor Defense System Large Roach Baits Raid Double Control Large Roach Baits kill the roaches you see as well as the ones you don t see with 2 types of baits. After roaches feed on the bait they return to the nest and transfer the bait to the others thereby killing the entire nest. Population reduction and less activity can be expected within days with the baits working for up to 3 months. Kills Roaches Palmetto Bugs and Waterbugs. Use indoors in corners along walls and near entry points to kill roaches where they hide. For maximum effectiveness place all baits at the same time.