Macchioni, FabioPerrucci, StefaniaCioni, PierluigiMorelli, IvanoCastilho, PaulaCecchi, Francesca2021-04-092021-04-092006Macchioni, F., Perrucci, S., Cioni, P., Morelli, I., Castilho, P., & Cecchi, F. (2006). Composition and acaricidal activity of Laurus novocanariensis and Laurus nobilis essential oils against Psoroptes cuniculi. Journal of Essential Oil Research, 18(1), 111-114.http://hdl.handle.net/10400.13/3267The major components of Laurus nobilis and L. novocanariensis leaf oils were identifi ed and their acaricidal activity against Psoroptes cuniculi evaluated. Monoterpenes were predominant in L. nobilis oil (91.8%), while ses quiterpenes were only 1.4%. The main components of this oil were 1,8-cineole (39.2%), α-terpinyl acetate (11.3%), sabinene (10.6%) and linalool (7.4%). The acaricidal activity of L. nobilis oil, at a concentration of 10%, led to a mortality rate of 73%; at 5% the average activity was signifi cantly reduced to 51%, while dilutions of 2.5%, 1.25% and 0.625% were ineffective. Laurus novocanariensis oil, compared to L. nobilis, was richer in sesquiterpenes; the main constituents were α-pinene (10.4%), 1,8-cineole (9.6%) and β-selinene (7.2%). After 24 h of contact, the oil of L. novocanariensis killed all the mites when used at 10% and 5% concentrations. At lower concentrations the mortality signifi cantly decreased; a dilution of 0.625% was ineffective.engPsoroptes cuniculiLaurus nobilisLaurus novocanariensisLauraceaeAcaricideEssential oil compositionα-pineneSabinene1,8 cineoleα-terpinyl acetate.Faculdade de Ciências Exatas e da Engenhariajournal article10.1080/10412905.2006.9699403