Farnam Nature's Defense Concentrate Botanical Fly Repellent, 32 fl. oz. Nature's Defense Fly repellent spray offers a fresh alternative for pest control. Combines citronella with other botanicals for effective control against five types of flies, mosquitoes and gnats. Repels horn, stable, House, horse and deer flies, plus mosquitoes and gnats Contains no preservatives, additives or artificial colors and the alcohol-free formula won't irritate sensitive skin Contains citronella oil, clove oil, mint oil, thyme oil and sodium lauryl Sulfate Available in ready-to-use 32 oz. Spray or 32 oz. Concentrate that make 5 quarts