German cockroach – Blattella germanica (Linnaeus). Adults are about ½ inch long, light brown in color and have two stripes running lengthwise on the pronotum just behind the head. Immatures (nymphs) have a light-colored area on their back. This is a true Commensal roach as they are only found infesting structures. Being nocturnal, they are active at night when other activity is typically low. They are known to carry bacteria that cause food poisoning. They are also known to be one of the greatest causes of asthma-like symptoms in children. Elimination of food, water and shelter is key to the successful management of German roach infestations.