Abstract

LEYVA, Maureen et al. Use of essential oils from endemic pinaceae as an alternative for Aedes aegypti control. Rev Cubana Med Trop [online]. 2009, vol.61, n.3, pp. 239-243. ISSN 1561-3054.

INTRODUCTION: Pinus caribaea and Pinus tropicalis are endemic plants of Cuba and their chemical composition exhibits structures similar to those reported in other plant species with strong insecticidal action. OBJECTIVE: to evaluate the larvicidal effect of two pinaceae and their derivatives (turpentine oils) on Aedes aegypti in addition to determine the ovicidal effect of the latter on this species' eggs. METHODS: a reference susceptible strain called Rockefeller supplied by the Center of Disease Control in San Juan, Porto Rico was the choice whereas bioassays were conducted according to the World Health Organization methodology to ascertain resistance and (or) susceptibility of mosquitoes to insecticides. Water distillation allowed obtaining Pinus tropicalis oil and vapour dragging. Turpentine oil (AT01) was obtained by distilling pine resin and one part of it (AT02) underwent photochemical treatment of izomerization of a-pinen y b-pinen as main components. RESULTS: P. tropicalis showed lethal concentration LC₅₀= 42 mg/L and LC₉₅= 57 mg/L, and for P. caribaea, LC₅₀= 51 mg/L and LC₉₅= 181 mg/L. The two turpentine oils AT01 and AT02 exhibited high larvicidal action since they recorded the lowest LC₅₀ of this study (21,4 mg/L and 23,9 mg/L). The greatest ovicidal effect went to diagnostic dose of AT02 turpentine oil, with 94% of hatching-deterrent action. CONCLUSIONS: leaf oils and their derivatives are candidates for the control of this species, because of their insecticidal action and also their feasibility, extraction and scaling.

Keywords : Aedes aegypti; Pinus; turpentine; essential oils.

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