Blattella asahinai

Appearance

The Asian cockroach is nearly identical to the German cockroach except for a few minor morphological differences. Like the German cockroach, it is about 1.6 cm long, is tan to brown in color, and has wings. However, its wings are longer than the German cockroach, and there is a difference between a groove in the abdomen between the two species. There are other differences. The quickest way to tell the difference between the two species is that the Asian cockroach is a strong flyer and is attracted to light, unlike the German cockroach. This species tends to prefer the outdoors, whereas the German cockroach prefers living indoors.

Distribution

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"Blattella asahinai" is found in tropical and subtropical climates, and was first identified in the United States in 1986 in Lakeland, Florida. It has since expanded throughout much of Florida and is spreading into other southern states. In addition to Florida, it is reported in Alabama, Georgia, South Carolina, and Texas. Its population reaches its zenith in late August and declines rapidly with the onset of cool weather. During adverse weather conditions such as cold weather or dry conditions, the Asian cockroach will burrow down into the leaf litter.