Field Evaluation of a Lethal Ovitrap for the Control ofAedes aegypti(Diptera: Culicidae) in Thailand

Abstract

In 1999 and 2000 we evaluated a lethal ovitrap (LO) for the control of Aedes aegypti (L.) in three villages in Ratchaburi Province, Thailand. Two blocks of 50 houses (a minimum of 250 m apart) served as treatment and control sites in each village, with each house in the treatment area receiving 10 LOs. Thirty houses in the center of each treatment and control block were selected as sampling sites, with larval and adult mosquito sampling initiated when LOs were placed. Sampling was conducted weekly in 10 of the 30 houses at each site, with each block of 10 houses sampled every third week. Sampling continued for 30 wk. Efficacy of the LO was evaluated by determining number of containers with larvae and/or pupae per house and number of adult mosquitoes collected inside each house. In 1999, the LO had a negligible impact on all measures of Ae. aegypti abundance that were assessed; however, fungal contamination of insecticide-impregnated strips may have been responsible for the low efficacy. In 2000, significant suppression was achieved based on changes in multiple entomologic criteria (containers with larvae, containers with pupae, and number of adult Ae. aegypti); however, control was not absolute and neither immature nor adult Ae. aegypti were ever eliminated completely. We conclude that the LO can reduce adult Ae. aegypti populations in Thailand; however, efficacy of the LO is lower than desired due primarily to the high number of alternative oviposition sites. LO efficacy may be improved when used as part of an integrated control program that places emphasis on reduction of adjacent larval habitats. Further studies are required to assess this issue.

The Effects of Sustained Release Metofluthrin on the Biting, Movement, and Mortality of Aedes aegypti in a Domestic Setting

“…1,2 This day-biting mosquito has a close association with the urban environment, 3,4 almost exclusively feeding on human hosts 5,6 and breeding in artificial containers found in the domestic setting (i.e., pot plant bases, tires, roof gutters, etc.). 7 Aedes aegypti regularly take multiple blood meals, often from different humans, to complete their gonotrophic cycle.…”

Evaluación de ovitrampas para vigilancia y control de Aedes aegypti en dos centros urbanos del Urabá antioqueño

“…Perich, et al, (29) evaluaron ovitrampas letales que contenían telas impregnadas con deltametrina y encontraron que estas disminuían significativamente las poblaciones de A. aegypti en las viviendas intervenidas. En Tailandia, Sithiprasasna, et al, (30) evaluaron las ovitrampas letales para el control de A. aegypti y determinaron que su empleo, además de la eliminación de los criaderos, podía reducir las poblaciones del mosquito. Regis, et al, (31) evaluaron ovitrampas que contenían el larvicida biológico Bacillus thuringiensis var.…”

Evaluación de estrategias comunitarias para el control de Aedes aegypti en Cali, Colombia

“…quinquefasciatus and Ae. aegypti because they permanently maintain water (19,23). In this study, the catch basins evaluated were highly positive for larvae and pupae of Cx.…”