Sewer roaches, or American cockroaches, are commonly found in sewers and moist environments. They are the largest species of common cockroach and can grow up to 2 inches long. Sewer roaches can find their way into a house through drains, cracks and crevices and under doorways. Sewer roaches feed on decayed and rotting matter, which harbors bacteria and viruses. Once a cockroach gets inside a home it can spread these germs to the residents.
Use some boric acid to kill roaches. Sprinkle small amounts behind appliances or furniture. Boric acid is an extremely effective roach killer. It works by attacking the roach’s nervous system and dehydrating its body. It’s also non-repellent, which means the roaches will keep returning until they are all dead.
Sprinkle boric acid lightly on all the carpeted areas of your home. Let the powder sit for 24 hours, then vacuum it up. Discard the vacuum bag immediately in an outside trash container.
Maintain proper sanitation. Keep a regular cleaning schedule, especially in the bathroom and kitchen. Store food in tight lid containers or in the refrigerator.
Use a dehumidifier to keep relative humidity to a minimum in your home. This will help deter sewer roaches because they thrive in humid environments.
Prevent sewer roaches from coming into your home. Seal off any entry points such as holes or cracks with caulk. Check around pipes, baseboards, doors and windows for possible cracks.
Boric acid is considered safer than commercial products, but is still poisonous, so use caution when using around pets and children.