ACTIVIDAD LARVICIDA DE EXTRACTOS DE Rhizophora mangle L. CONTRA ESTRONGíLIDOS GASTROINTESTINALES DE OVINOS

in order to know the in vitro activity of three of the rhizophora mangle l., on exogenous larval development of gastrointestinal strongles of sheep. it were used three extract: r. mangle aqueous extract directly from bark, aqueous and methanol extracts obtaining by lixiviation from residual material after the manufacturing of register drugs. each extract was evaluated in three concentration level: 5 mg/ml, 25 mg/ml, 50 mg/ml, for evaluate its action on larvae of members of these order where trichostrongylus spp was represented fundamentally. the results showed that the three extracts in concentrations of 50 mg/ml, significantly reduced (p<0.05) from the development of l3 on the fourth day of experiment (sixth day of larval life), with an average of 64.12% effectiveness. these results reveal that extracts of the r. mangle l show larvicide activity, on the sheep gastrointestinal strongles larvae.