Farnam Nature's Defense Fly Repellent Spray (Concentrate) - 32oz No reviews. Login to place a review. •Repels horn, stable, house, horse & deer flies, mosquitoes and gnats •Alcohol-free formula won't irritate sensitive skin •Contains citronella oil, clove oil, mint oil, thyme oil and Sodium Lauryl Sulfate $34.99 ea Enter Quantity Options: Add to Cart Add to List In Stock $34.99 Log in to see your Member Loyalty Rewards PRODUCT DETAILS Farnam Nature's Defense Fly Repellent Spray (Concentrate) - 32oz Nature's Defense Water-Based 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. Contains no preservatives, additives or artificial colors. Feel good about making a natural product part of your fly control program.