Resumo

LEYVA, Maureen et al. Insecticidal effect of essential oils from plants in Aedes aegypti larvae (Diptera: Culicidae). Rev Cubana Med Trop [online]. 2008, vol.60, n.1, pp. 0-0. ISSN 1561-3054.

INTRODUCTION: The search for new alternatives and environmentally-friendly compounds that generate minimal resistance such as natural products and metabolites of vegetal origin constitutes an important research line included in the comprehensive management of plagues and vectors. OBJECTIVE: To evaluate the insecticidal activity of essential oils from Curcuma longa, Melaleuca leucadendron, Artemisia abrotanum against Aedes aegypti mosquitoes. METHODS: An Aedes aegypti reference strain, susceptible to insecticides and stabilized at the laboratory, was used for the bioassays. It was known as Rockefeller. The bioassays were performed following the WHO methodology. RESULTS: Dosing and mortality indexes were obtained for the three essential oils. For Curcuma longa oil, LC₅₀= 0.0025 (lethal concentration that causes 50 % mortality), LC₉₅= 0.0044 % (lethal concentration that causes 95 % mortality) and regression line Y= 5.56 + 6.60X. For Melaleuca leucadendron oil, LC₅₀= 0.0041 %, LC₉₅= 0.0051 % and the regression line was Y= 5.20 + 13.90X. Artemisia abrotamun oil showed LC₅₀= 0.0193 %, LC₉₅m= 0.0272 % and the regression line was Y= 5.22 + 11.19X. CONCLUSIONS: This study verified the insecticidal action of these oils on Aedes aegypti larvae and recommended diagnosis doses of 113 mg/L= 0.0113 % for Curcuma longa, 120 mg/L= 0.0120 % for Melaleuca leucadendron, and 620mg/L= 0.062 % for Artemisia abrotamum.

Palavras-chave : Essential oil; Aedes; Curcuma; Melaleuca; Artemisia.

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