Resumen

AGRELA, Irma F  y  HERRERA, Flor . Larvicidal action of alcoholic extracts of the seed of Annona Muricata (soursop) on Aedes Aegypti y Aedes Albopictus. Bol Mal Salud Amb [online]. 2016, vol.56, n.2, pp.235-238. ISSN 1690-4648.

Reports of resistance of different species of vectors to insecticides used in control programs are every time more frequent. Therefore, there is a growing interest to control harmful vectors (that transmit diseases such as dengue) by developing products that are effective, economical and environment friendly. Crude extracts obtained from different plants have demonstrated larvicidal activities. The objective of this research was to evaluate the larvicidal activity of two alcoholic extracts (ethanol and methanol) obtained from the seeds of Annona muricata (soursop) on Ae. aegypti (strain Rockefeller) and Ae. albopictus, exposed for 24 h to different dilutions of each extract. Lethal concentrations (LC₅₀) were as follows: a) For Ae. aegypti 41.8 mg L^-1 (LC_0.95 =34.5 to 49.2 mg L^-1) with ethanolic extract and 32.8 mg L^-1 (LC_0.95 =27.4 to 38.4 mg L^-1) with methanolic extract; and b) For Ae. albopictus 299.6 mg L^-1 (LC_0.95=224.9 to 377.3 mg L^-1) with ethanolic extract and =326.1 mg L^-1 (LC_0.95=209.5 to 442.4 mg L^-1) with methanolic extract. The analysis of the results showed that the toxic effect of both alcoholic extracts on Aedes was similar and depends on the species and the concentration used. The results suggest that the alcoholic extracts obtained from A. muricata are an alternative for control of Aedes species present in Venezuela.

Palabras clave : dengue; Aedes; Annona muricata; larvicides; lethal concentration.