A Comparison of Gravid and Under-House CO2-Baited CDC Light Traps for Mosquito Species of Public Health Importance in Houston, Texas

Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX 77843-4458, USA.
Journal of Medical Entomology (Impact Factor: 1.95). 11/2009; 46(6):1494-7. DOI: 10.1603/033.046.0637
Source: PubMed


The relative efficacy of gravid and under-house CO2 traps for monitoring mosquito species of public health importance within the Houston metroplex area was assessed. Gravid and under-house traps were colocated at 10 sites and monitored weekly between 1 March to 31 May 2007. The most numerous species caught was Culex pipiens quinquefasciatus Say. Other species of public health importance caught in gravid and under-house traps included Culex restuans Theobald, Aedes aegypti (L.), and Aedes albopictus Skuse. Adjusting for the week of collection, gravid traps caught significantly more mosquitoes (mean 23.1 per trap) in the study area than under-house traps (mean 3.6 per trap). However, under-house traps caught a greater variety of mosquito species (13) than gravid traps (11). Gravid and under-house traps only caught nine of 15 of the same mosquito species during the study period. In this study area, gravid traps should be used as the primary method of surveillance for mosquito-borne diseases of public health importance during the early part of the season, because of greater catch numbers of mosquitoes that pose a public health risk.

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    • "Concerning the efficiency of different models of traps in attracting mosquito females, Kesavaraju et al. (2011) and Allan and Kline (2004) compared some commercial models of gravid traps with structural differences and found that several characteristics significantly affect mosquito collection efficacy. Commercial gravid traps differ in basic design, color and size of the tank that contains the infusion, giving different capture results (Allan and Kline, 2004, Dennet, 2007; White et al., 2009). "
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