Pest Facts: German Cockroaches - National Pest Management Association
The German cockroach is by far the most
important and usually the most common
of the cockroaches.
Color: Light brown to tan, with two dark,
almost parallel stripes located on their backs,
just behind their heads
Size: ½-5/8 inch
German cockroaches can be found throughout structures but show a preference for warm and humid places. They are usually found in kitchens and secondarily in bathrooms, but infestations often occur in rooms where people eat and drink.
German cockroaches prefer to live in cracks and crevices near food sources and spend 75% of their time in such harborages. German cockroaches prefer to live close to sources of food and water, hence their affinity for residential and commercial kitchen environments.
Cockroaches have been reported to spread at least 33 kinds of bacteria, six kinds of parasitic worms, and at least seven other kinds of human pathogens. They can pick up germs on the spines of their legs and bodies as they crawl through decaying matter or sewage and then carry these into food or onto food surfaces. Germs that cockroaches eat from decaying matter or sewage are protected while in their bodies and may remain infective for several weeks longer than if they had been exposed to cleaning agents, rinse water, or just sunlight and air. Medical studies have shown that cockroach allergens cause lots of allergic reactions, especially in children. They were even shown t cause asthma in children. These allergens build up in deposits of droppings, secretions, cast skins, and dead bodies of roaches.
Good sanitation and habitat reduction, along with vacuuming, surveillance, and baiting program, and some sealing of cracks can usually reduce or eliminate a cockroach problem. The reduction of moisture sources, such as leaking pipes, is also helpful.