Chemical and biological profiles of the essential oils from aromatic plants of agro industrial interest in Castilla-La Mancha (Spain)

The chemical composition and biological activities of essential oils of Salvia officinalis L., Salvia lavandulifolia Vahl., Lavandula x intermedia Emeric ex Loisel., Lavandula latifolia Medik., Lavandula angustifolia Mill, and Thymus vulgaris L. are presented. The essential oils have been analysed by Gas Chromatography Mass Spectrometry and 61 compounds were identified, 23 of which represented more than 1% of the essential oil. The 1,8 cineole (16-23%) appeared as the main compound of Salvia sp. essential oils. The high content of alpha -thujone was characteristic in S. officinalis oil. Remarkable concentrations of linalool (30-33%), camphor (5-17%) and linalyl acetate (9-28%) were detected in Lavandula sp. oils while carvacrol (21.6%) and p-cimene (23.7%) were the most abundant compounds in T. vulgaris oil. Biological characterization was based on their bioplaguicide activity. The essential oils studied had strong antifeedant effects against Leptinotarsa decemlineata Say, Spodoptera littoralis Boisd., Myzus persicae Sulzer and Rhopalosiphum padi L., phytotoxic activity against Lactuca sativa L. and Lolium perenne L. and also exhibited high antifungal activity against Fusarium sp. Oils from T. vulgaris and L. latifolia showed the highest levels of bioactivity against all target species. These results provide an added-value to the essential oils of aromatic plants of agro-industrial interest for its potential use in the development of natural agrochemicals.Original Abstract: En este trabajo se presenta el estudio quimico y biologico de los aceites esenciales de Salvia officinalis L., Salvia lavandulifolia Vahl., Lavandula x intermedia Emeric ex Loisel., Lavandula latifolia Medik., Lavandula angustifolia Mill, y Thymus vulgaris L. El estudio qufmico por cromatografia de gases acoplada a espectrometria de masas de los aceites esenciales permitio la identificacion de 61 compuestos, de los cuales 23 presentaron un porcentaje mayor o igual al 1 %. Los aceites esenciales de Salvia sp. se caracterizaron por presentar un alto contenido de 1,8 cineol (16-23%) y, en el caso especifico de S. officinalis, una elevada proporcion de alpha -tuyona (15.7%). En Lavandula sp., los compuestos mayoritarios del aceite fueron lina-lol (30-33%), alcanfor (5-17%) y acetato de linalilo (9-28%); mientras que en T. vulgaris lo fueron carvacrol (21.6%) y p-cimeno (23.7%). La caracterizacion biologica, desde el punto de vista de la actividad bioplaguicida, mostro que los aceites ensa-y