Tea tree essential oil (Melaleuca alternifolia): extracted from the leaves of an Australian shrub, this essential oil has antiseptic properties. It is traditionally used to disinfect skin wounds and to treat several skin conditions. A study conducted vitro in 2004 on scabies mites showed that tea tree oil (5%) was effective in killing pests. The study therefore concluded that the active compound in tea tree oil, terpinene-4-ol, was a potentially interesting miticide.⁸. Further studies must be carried out to confirm these results.