Determinación del período estacional de oviposición de Aedes aegypti (Diptera: Culicidae) en la ciudad de Santa Rosa, La Pampa, Argentina

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Abstract

Se estudió el período de oviposición de Aedes aegypti L. para Santa Rosa, La Pampa, Argentina. Se ubicaron ovitrampas, durante el año 2011, en cinco ubicaciones diferentes de la ciudad. Se las revisó semanalmente durante todo ese año. También se estudió la relación entre temperatura y actividad de oviposición semanal, observándose un cese en la actividad de oviposición cuando la temperatura media descendió por debajo de los 16°C. Estos datos permiten ampliar el conocimiento de este vector en la capital de la provincia, información necesaria para la implementación de medidas de control en dicha ciudad.

Translated abstract

The oviposition period of Aedes aegypti L. was studied for Santa Rosa, La Pampa, Argentina. Ovitraps were placed during the year 2011 in five different locations of this city and weekly samplings were carried out during that year. The relationship between temperature and weekly oviposition activity was also studied and a stop in the oviposition activity was observed when the temperature dropped below 16°C. These data allow us to extend the knowledge of this vector in the provincial capital, providing as well the necessary information to implement control measures in this city.

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Most cited references 20

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Aedes aegypti, eradicated from Argentina in 1963, has now reinfested the country as far south as Buenos Aires. In 1997, four persons with travel histories to Brazil, Ecuador, or Venezuela had confirmed dengue, and surveillance for indigenous transmission allowed the detection of 19 dengue cases in Salta Province. These cases of dengue are the first in Argentina since 1916 and represent a new southern extension of dengue virus.

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Larvicidal activity of the essential oil from Lippia sidoides cham. against Aedes aegypti linn

Ana Fontenele Urano Carvalho, Vânia Melo, Afrânio Craveiro … (2003)

The aim of this work was to study the larvicidal activity of Lippia sidoides essential oil against Aedes aegypti larvae. The essential oil and its hydrolate (saturated solution of essential oil in water) were obtained by vapor extraction and their chemical composition determined by GL-chromatography coupled to mass spectroscopy. Bioassays were run with the essential oil, pure and diluted hydrolate and with their main constituents thymol and carvacrol. The results obtained showed that L. sidoides essential oil and its hydrolate have larvicidal action against the mosquito A. aegypti, causing an almost instantaneous mortality. Thymol, an alkylated phenol derivative and one of the major components of L. sidoides essential oil, was identified as the active principle responsible for the larvicidal action, causing 100% larval mortality at the lowest tested concentration of 0.017% (w/v). These results suggest that the essential oil of L. sidoides is promising as larvicide against A. aegypti and could be useful in the search of newer, more selective, and biodegradable larvicidal natural compounds to be used in official combat programs and at home.