No abstract

2 μL.L-1 of air. Additionally, the commercial β-caryophyllene was subjected to various chemical modifications to afford five derivatives, which were characterized by spectrometric methods as being caryophyllene oxide; 4,5-dihydroxy-caryophyl-8(15)-ene; caryoph-4,8-dihydroxy-5-yl acetate; βnocaryophyllone aldehyde and β-nocaryophyllonic acid. The acaricide activity against T. urticae of these derivatives was only observed at β-caryophyllene CL95 (97,78 ± 1,11% of lethality), and the best result of lethality was for the β-nocaryophyllone aldehyde (5,71±1,20%). Beyond the chemical composition, this study showed periods of increased oil production and acaricidal activity.