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Idesia (Arica)

versão On-line ISSN 0718-3429

Resumo

DA SILVA, Toshik Iarley et al. Larvicide activity of essential oils on Aedes aegypti L. (Díptera: Culicidae). Idesia [online]. 2017, vol.35, n.2, pp.63-70.  Epub 13-Maio-2017. ISSN 0718-3429.  http://dx.doi.org/10.4067/S0718-34292017005000026.

Aedes aegypti L. is the most important mosquito in terms of public health in the world. It transmits a virus that causes several diseases, among them, dengue fever. Traditionally, the intensive use of insecticides has been the main strategy to control A. aegypti and to eliminate adult mosquitos or their larvae; however, this may lead to resistance by the mosquitos and damages to human health and the environment. Essential oils from medicinal plants have shown high efficiency as alternative larvicides. Therefore, the objective of this paper was to evaluate the larvicide potential of Vanillosmopsis arborea and Hyptis suaveolens on Aedes aegypti larvae. The essential oils were extracted by the hydrodistillation method using a Clevenger equipment. The completely randomized design (CRD) was used with a 2x5 factorial, with two essential oils and five concentration levels (200; 150; 100; 50; and 0 ppm). Each one of the ten treatments was replicated four times with ten larvae each, totaling 40 plots. Analyses were made regarding LC10, LC50, LC90, test of means, and regression and efficiency analysss. The V. arborea oil showed values of LCW = 39.69 ppm, LC50 = 48.98 ppm, and LC90 = 60.45 ppm, while the H. suaveolens oil showed values of LCW = 78.46 ppm, LC50 = 139.7 ppm and LC90 = 246.48 ppm. The main chemical component of V. arborea was a-bisabolol (94.17%), while for H. suaveolens, it was 1,8-cineol (72.23%). The essential oils showed a larvicide effect on A. aegypti larvae

Palavras-chave : Dengue fever; Biolarvicide; Medicinal plants.

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