Two New Zealand plant species colloquially known as tea trees have been shown to have very effective antimicrobial properties.
The two species are manuka (Leptospermum scoparium) and kanuka (Kunzea ericoides) have been tested against a range of fungi and bacteria with positive results.
These species have been used by the New Zealand Maori people for over 1000 years to treat infection and inflammation.
The scientific study confirms these uses and discusses practical commercial applications like the production of soaps, skin creams, oils of various concentration, mouthwash and toothpaste.
While these essential oils have proven antifungal and antibacterial activity the method of delivery is different than the also highly antibacterial Manuka UMF honey.
You can read the scientific study here: https://www.academia.edu/17848179/Investigations_of_kanuka_and_manuka_essential_oils_for_in_vitro_treatment_of_disease_and_cellular_inflammation_caused_by_infectious_microorganisms?email_work_card=view-paper