Composición química del aceite esencial de Piper hispidum Sw. y actividad antimicrobiana sobre Xanthomonas albilineans (Ashby) Dowson y Xanthomonas campestris pv. campestris (Pammel) Dowson

The essential oils are a potential alternative to the control of phytopathogenic bacteria. The aims of this work to determine the chemical composition of the essential oil of Piper hispidum Sw. and to established its antibacterial activity against Xanthomonas albilineans (Ashby) Dowson and Xanthomonas campestris pv. campestris (Pammel) Dowson. The composition of the leaves essential oil of this plant, obtained by hydrodistillation in a Clevenger-type apparatus, was researched by Gas Chromatography- Mass Spectrometry (GC/MS). The antibacterial effect of the essential oil was evaluated using the agar diffusion method. The essential oil (yield 0,17%) is a complex oil that have trans- α- bisabolene (11,28%) as the principal component and there are others like: β-pinene (8,2%), α-pinene (4,76%), allo-aromadendrene (4,92%), (-) spatulenol (3,65%) and L-linalool (3,61%). The oil shown a weak antibacterial activity against X. campestris pv. campestris and strong against X. albilineans, for that it is may consider as a candidate for the management of this last bacterium.