Lemon scented eucalyptus is rich in antiseptic and antifungal properties. It is also known to have potent insect repellent properties which is why we have included it in our Bug Spray. Lemon Eucalyptus is an excellent air purifier when used in a diffuser. The aroma of lemon scented eucalyptus is fresh, alive and full of vitality. It creates a sense of freedom and excitement.