But, be careful. More expensive is not always more efficient. The battle against fleas is matched only by the battle of the giant manufacturers to lower the prices of the spot-on products. These are nature's repellants. They ward off unwanted hitchhikers.
Most common ingredients are citronella, cedar, eucalyptus, lemongrass, and lavender.
Our Kristull Herbal Oils are specially formulated to repel fleas and ticks without using insecticides. They are a repellant, not an insecticide, though. House treatments are safer and easier than ever. Adulticides kill adult populations of fleas, and carpet spray adulticide aerosols are the easiest and often most effective treatments. There's no mixing.