Acaricidal and Insect Antifeedant Effects of Essential Oils From Selected Aromatic Plants and Their Main Components

12 Pág. Departamento de Reproducción Animal​This work has demonstrated the ixodicidal and insect antifeedant effects of essential oils from 14 experimentally cultivated aromatic plants. The strong ixodicidal and antifeedant oils corresponded to Thymus zygis, Thymus vulgaris, Satureja montana, Oreganum virens, and Mentha suaveolens. The moderately active oils were from Lavandula angustifolia, Mentha piperita, Mentha spicata, Artemisa herba-alba, and Rosmarinus officinalis. The most effective larvicidal and antifeedant compounds were piperitenone oxide, carvacrol, piperitenone, and thymol, explaining the effects of the most active essential oils. The rest of the tested compounds were not ixodicidal or antifeedant. Therefore, the activity of moderately active oils cannot be explained by their main components (linalyl acetate, linalool, menthone, menthol, limonene, camphor, 1,8-cineole, p-cymene, α-pìnene, and carvone), suggesting synergistic effects. Considering the ixodicidal and antifeedant effects of these extracts, the plants have been ranked in relation to Thymus vulgare, a commercial biopesticide ingredient, for their potential as botanical pesticides. T. zygis, S. montana, and M. suaveolens ranked over T. vulgaris as ixodicidal agents and S. montana as insecticidal. Therefore, we propose the plant populations of S. montana, T. zygis, and M. suaveolens tested here for further development as biopesticide ingredients.This work has been supported by grants from ERASMUS+ no. 2018-1-FR01-KA202-047892, Biocontrol E Training (BET), and ERASMUS+ 600873-EPP-1-2018-1-ES-EPPKA2. European Hub on New Challenges in the Field of Essential Oils (EOHUB), PID2019-106222RB-C31, MCI, Spain, RTA 2014-00080-00-00, Spain, and the R+D contracts CSIC-Villamagna Estudio Biodirigido de Extractos Ixodicidas and UCM-Villamagna SL Investigación en torno al control de las garrapatas y al estado sanitario de la fauna silvestre.Peer reviewe