Ortho Orthene Ant & Roach Killer 16oz. Take care of bug infestations both inside and outside the home with Ortho Orthene Ant & Roach Killer. This product is a ready-to-use insect killer dust that works to kill listed insects for up to 8 months. It controls ants, roaches, fleas, ticks, spiders, scorpions, stink bugs, and other listed pests. The bug killer is also odorless and does not need watered in. Ortho® Orthene® Ant & Roach Killer is for indoor and outdoor use. It can be used in and around houses, apartments, animal quarters, household greenhouses, mobile homes and recreational vehicles, ornamentals, and vegetables. This ready-to-use insecticide is intended for applications with a hand duster, from the container, or by other suitable means, to hiding and runway areas and other places where insects are found. Apply Ortho Orthene Ant & Roach Killer pest control when insects or their damage first appear. Please refer to the product label for specific application instructions.