Actividad biocida del aceite esencial de lippia origanoides H.B.K sobre Phytophthora infestans (Mont.) de Bary

Abstract

The essential oil of wild Lippia origanoides H.B.K was evaluated as an alternative for the control of the phytopathogen P. infestans isolated from tomato Solanum lycopersicum L. To do this, the essential oil was extracted by steam entrainment, identifying and quantifying the composition by GC-MS. At in vitro level, the biocidal action was calculated using the agar diffusion technique, estimating the minimum inhibitory concentration and the active fraction was recorded by bioautography. The analyses identified thymol (83%) as the major compound in the oil. The in vitro tests showed high sensitivity of the phytopathogen with a minimum inhibitory concentration of 75 μL.mL-1 where the thymol caused the biocidal activity. With these results, the potential of the essential oil for the management of the phytopathogen and its viability for the development of an agricultural bio consumables.