In common with other eucalyptus species eucalyptus citriodora lemon scented eucalyptus is originally from australia but is now cultivated mainly in china and brazil it is often used as a minor ingredient in soap and detergent perfumes to add freshness and is commonly the active ingredient in natural insect repellents eucalyptus radiata and globulus have a higher pinene content and are therefore more useful in steam inhalationsuse 8 10 drops of eucalyptus citriodora in a diffuser or burner