oil, eugenol kills rat fleas on contact and repels rat fleas by its vapors alone. Eugenol also has analgesic, antiseptic, microbicidal, antihelminthic, and anesthetic properties. Cypress ( Cupressus sempervirens ) oil contains the monoterpenes camphene , cymene , and pirene . These natural insecticides and insect repellents also have antiseptic, microbicidal,