It appears to have anti-staph effects. It is a stronger insecticide than citronella. It can be very sedating in small quantities. Organic Patricia Davis says this is the most useful Eucalyptus because it smells better and is more easily assimilated. It is most useful for sinus conditions because it can be breathed very closely without triggering a cough reflex.
Many sources say it is the oil of choice for infections high up in the chest.
Wild This is the mildest of the eucalyptus, safe for children and the elderly. It may be used for relatively long periods of time. Some authorities recommend it as a preventative as it effects the entire respiratory system and immune system. Many authorities recommend using this oil neat, because of its mildness. Eucalyptus Smithii makes a good room disinfector in a diffuser, but can trigger a cough reflex if breathed too close.