Abstract This study aimed to chemically characterize the essential oils (EOs) of Cinnamomum zeylanicum (cinnamon) and Eremanthus erythropappus (candeia) evaluate their acaricidal activity, together with that major compounds cinnamyl acetate derivative, against Rhipicephalus microplus. Essential oil were identified through gas chromatography. The larval packet test (LPT) at concentrations rangin...