RESUMEN
The chemical constituents and insecticidal activity of essential oil obtained by hydrodistillation of the leaves of Paullinia pinnata Linn (Sapindaceae) are being reported. The essential oil were analysed by using gas chromatography (GC) and gas chromatography coupled with mass spectrometry (GC-MS). Different concentrations (50, 100, 150, 200 and 250 mg/mL) of P. pinnata essential oil prepared separately and diluted in dimethyl sulfoxide (DMSO) were tested on the maize weevil, Sitophilus zeamais. The main constituents of the oil were pentadecanoic acid (17.9%), isoaromadendrene epoxide (11.5%) and wine lactone (11.2%). Other significant compounds of the essential oil were eremophilene (6.9%) and phytol (6.2%). The essential oil displayed 100% mortality (fumigant toxicity) against S. zeamais adults at tested concentration of 150 mg/mL with lethal concentrations (LC50) of 51.87 mg/mL air. This is the first report on the chemical constituents and insecticidal activity of essential oil of P. pinnata and may be explore as a potential natural herbal plant for the control of insect pest.
Se informan los componentes quiÌmicos y la actividad insecticida del aceite esencial obtenido por hidrodestilacioÌn de las hojas de Paullinia pinnata Linn (Sapindaceae). El aceite esencial se analizoÌ mediante cromatografiÌa de gases (GC) y cromatografiÌa de gases acoplada con espectrometriÌa de masas (GC-MS). Se ensayaron diferentes concentraciones (50, 100, 150, 200 y 250 mg/ml) de aceite esencial de P. pinnata preparado separadamente y diluido en dimetilsulfoÌxido (DMSO) en el gorgojo de maiÌz, Sitophilus zeamais. Los componentes principales del aceite fueron aÌcido pentadecanoico (17,9%), isoaromadendreno epoÌxido (11,5%) y vino lactona (11,2%). Otros compuestos significativos del aceite esencial fueron eremophilene (6,9%) y phytol (6,2%). El aceite esencial mostroÌ una mortalidad del 100% (toxicidad fumigante) contra los adultos de S. zeamais a una concentracioÌn de 150 mg/ml con concentraciones letales (CL50) de 51,87 mg/ml de aire. Este es el primer informe sobre la composicioÌn del aceite esencial de P. pinnata y su actividad insecticida. Puede ser explorado como una potencial planta herbaÌcea natural para el control de la plaga de insectos.
Asunto(s)
Aceites Volátiles/farmacología , Aceites Volátiles/química , Paullinia/química , Insecticidas/farmacología , Terpenos/análisis , Cromatografía de Gases/métodos , Gorgojos/efectos de los fármacos , Insecticidas/químicaRESUMEN
The volatile constituents and insecticidal activity of the essential oil obtained by hydrodistillation of pulverized air-dried leaves of Dehinbolliapinnata Schum. & Thonn (Sapindaceae) growing in Nigeria were studied. The constituents of the oil were analyzed by gas chromatography (GC) aid gas chromatography coupled with mass spectrometry (GC-MS). The percentage yield of the oil was 0.04% (v/w). Fourteen compounds were characterized, representing 94.0% of the total volatile component of the oil. The major constituents of the oil were hexahydrofarnesyl acetone (37.5%), fainesyl acetone (17.2%) and geranyl acetone (14.6%). The essential oil, at a concentration of 120 mg/mL, displayed 100% mortality against Sitophilus zeamais at 72 h with a LC(50) > 40.00 mg/mL air.