Insecticidal properties of essential oils from Lippia turbinata and Lippia polystachya (verbenaceae) against Culex quinquefasciatus (Diptera: Culicidae).

RAQUEL GLEISER,; ZYGADLO JULIO,

Parasitology Research

Springer Verlag

Lugar: NY; Año: 2007 vol. 101 p. 1349 - 1354

Mosquitoes are important vectors of diseases to humans and domestic animals. Chemical control of vectors remains a main resource for the prevention and control of vector borne diseases. Due to the development of insecticide resistance and risks to human health and the environment of synthetic compounds, the search for alternative psticides is encouraged. This work assessed the insecticidal activity of essential oils form L turbinata and L. polystachya from Argentina on Culex quinquefasciatus mosquitoes. EOs were extracted by hydrodistillation and analyzed with GC-MS. The insecticidal activity against mosquito larvae, pupae, and adults were evaluated according to World Health Organization protocols. Concentrations ranking from 10 to 160 ppm were assessed at 1,2,3 and 24 h. post treatment. The composition of the EO of L. polystachya and L turbinata were qualitatively similar, with alpha thujone and carvone as amin constituents, differences were mostly due to the proportion of each component. Beta caryophyllene was also an important constituent of EO of L. turbinata. Both EO were larvicidal at concentrations of 80 ppm or higher, but only L. turbinata was adulticidad. No pupal mortality was detected.