As its name suggests, the Asian cockroach (Blattella asahinai) is most commonly found in Southeast Asia. However, the Asian cockroach has spread significantly and is now known to infiltrate houses worldwide. First documented in the United States in the 1980s, the Asian cockroach has since spread through most of the Southeastern United States. Like other species, the Asian cockroach is omnivorous and feeds on any available food source. They have been known to carry germs and can spread diseases to humans. Asian cockroaches are prolific breeders and reach peak populations in spring and summer.
Asian cockroaches appear identical to German cockroaches. Adults are about 13 to 16 mm long. They are light brown and have two parallel lines behind their head on the pronotum. The best way to distinguish them is through their behavior. Asian cockroaches are capable flyers, while German cockroaches are not. Asian cockroaches also live primarily outdoors, while German cockroaches tend to infest human dwellings.
Asian cockroaches are typically located in shaded, moist areas. While they are more likely to infest outdoor areas, they do sometimes enter homes. Asian cockroaches are most active at dusk and fly long distances toward sources of light. You may see an Asian cockroach attracted to your television screen or perched near lamps and other sources of illumination.
If you notice an Asian cockroach inside your home, the use of screens may be effective in preventing further infestation. However, a pest control expert should be contacted to discuss further treatment, as cockroach populations multiply quickly and are difficult to eradicate without professional help.