Larvicide and deterrent effects of fruit and leaf extracts from Melia azedarach L. on Aedes aegypti (L.) (Diptera: Culicidae).

CORIA GENOVESE, CRISTINA; ALMIRÓN, WALTER RICARDO; VALLADARES, GRACIELA ROSA; CECILIA CARPINELLA,; LUDEUÑA ALMEIDA, FRANCISCO FELIPE; TERESA DEFAGÓ, MARÍA; PALACIOS, SARA

BIORESOURCE TECHNOLOGY

ELSEVIER SCI LTD

Año: 2008 vol. 99 p. 3066 - 3070

0960-8524

Aedes aegypti (L.) (Diptera: Culicidae), the main urban vector of dengue, has developed resistance to various insecticides, making its control increasingly difficult. We explored the effects of Argentine Melia azedarach L. (Meliaceae) fruit and senescent leaf extracts on Ae. aegypti larval development and survival, by rearing cohorts of first instar mosquitoes in water with different extract concentrations. We also analysed oviposition deterrent activity in choice tests with extract-treated ovitraps. The leaf extract showed a strong larvicide activity, with all larvae dying before pupation, and significantly delayed development time. It strongly inhibited oviposition by Ae. aegypti females. The fruit extract showed much weaker effects. This first report of highly effective larvicidal, growth regulating and oviposition deterrent activity of a senescent leaf extract of M. azedarach against Ae. aegypti, suggests that such extract could represent a promising tool in the management of this mosquito pest.