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eBook details

• Title: Confirmation of Asian Cockroach Blatella Asahinai (Blattodea: Blattelidae) Introduction to Texas Based on Genetics, Morphology, And Behavior (Report)
• Author : Florida Entomologist
• Release Date : January 01, 2007
• Genre: Life Sciences,Books,Science & Nature,
• Pages : * pages
• Size : 192 KB

Description

Thought to be native to Japan based on the original description of specimens collected from Okinawa, Japan (Brenner et al. 1988), the Asian cockroach Blattella asahinai Mizukubo is now found in several southeastern states. Among these are Florida, portions of southern Georgia, southwestern Alabama, and Charleston County, South Carolina (Hu et al. 2005). The potential for the spread of this species to other southern U.S. States has been proposed (Atkinson et al. 1991). Interstate highways are now proving to provide major introduction routes throughout the southeast U.S. (E. Snoddy, pers. comm.). While populations of the Asian Cockroach have been proposed to occur in western Harris County, Texas (Tucker 2006) there has been no confirmation of this in literature nor have any samples been submitted for confirmation to Texas A&M University for independent verification. Furthermore, because of the close similarity with other blattelid species from the region species confirmation is crucial. Some populations have been described as occurring near the Barker Reservoir (in Western Harris County) in both residential and undeveloped areas. Additional populations were discovered by pest control technicians in a residential area (Hunters Creek Village subdivision of Houston, ~20 km east of the Barker Reservoir area) just west of Loop 610 Freeway near Voss Road. These populations were located in and near homes adjacent to Buffalo Bayou along the I-10 corridor, a possible introduction pathway to these communities. This is the first attempt to confirm species identity of this newly established exotic cockroach to Texas applying molecular, morphological, and ethological characters. Confirmation of this species in Texas demonstrates yet another invasive species which may have negative consequences for the areas where they have become established. Introduction of exotic Asian cockroach Blattella asahinai Mizukubo to the United States was first described in Lakeland, Florida in 1986 (Brenner et al. 1988; Roth 1986). Because of their overall similarity, original populations were thought to be German cockroaches Blattella germanica (L.). Likewise, another congener of Asian origin, the field cockroach Blattella vega Hebard is sometimes confused with B. asahinai and B. germanica. When the ability to observe these species in nature is eliminated, it can be difficult to discern them from preserved specimens, and identification has been based on cuticular hydrocarbon methods (Carlson & Brenner 1988) and molecular diagnostics (Pachamuthu et al. 2000). Herein, we apply ethological, morphological, and genetic approaches to confirm the presence of B. asahinai in Harris County, Texas.

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