The ventral surface of the left mandible, the vein coloration of the right tegmen, the wing size and venation as well as the setal marginal bristles on the cerci are the slight morphological differences between the Asian and German.

[4] Recent genetic analyses indicate that B. germanica only diverged from B. asahinai slightly over 2000 years ago, presumed to be the point at which the German cockroach spread to areas where it was no longer in contact with B.

[5] The first reported appearance of the Asian cockroach in the United States was in 1986 in Lakeland, Florida but at first it was believed to be the German species.

[4] It was noted that a pest control worker referred to them as "German cockroaches" but they could fly readily and were common outdoors.

It was confirmed that Asian Cockroaches were discovered in Harris County, Texas in May 2006 around the Barker Reservoir, in both urban and undeveloped areas.

This means at dusk, the Asian cockroach may fly towards the home and enter through open doors and windows but indoor invasions occur rarely.

In the Southern states of America, typical mulch types include cypress, oak leaf litter, pine, rubber, and topsoil.

They are predominantly a nocturnal species of cockroach, although they live and breed outdoors, they are attracted to light sources will find their way into buildings.

[17] An occasion where an Asian and a German mate with one another is extremely rare due to the behavioural differences of the two species but this can occur.

On the rare occasion they produce viable offspring, it has the ability to fly and inherits the insecticide resistance the German possesses.

[20] In 2006, entomologist Robert Pfannenstiel conducted research on the ecology of predators of crop pests in Texas, in particular the Asian cockroach.

Asian cockroaches ventured west into Texas in 2006, and became the most common predator of bollworm eggs in the state's Rio Grande Valley region.

[21] Helicoverpa zea (Boddie) and Spodoptera exigua (Hubner) are leading pests of soybean crops in Southern Texas.

Restaurants have implemented control measures such as Integrated Pest Management programs (IPM) which target the German cockroach.

[10] Indoor cockroach insecticides are generally ineffective in killing the Asian and will only control the ones that have entered the house but are difficult to contain once penetrating a location.

In order to control and manage the Asian, garden or outdoor area maintenance of homes – including removal of excess mulch and plant debris – is an effective approach to reduce population.

[16] Preventative measures for insects including sealing cracks or crevices in the floor or walls are unnecessary for Asian cockroaches as they can fly into buildings through open windows or doors anyway.