The Environmental Protection Agency (EPA) has registered insect-repellent apparel to battle mosquitoes, ticks and other insects. Greensboro, NC-based Buzz Off Insect Shield LLC’s Insect Repellant Apparel uses permethrin, a synthetic version of a repellent that occurs naturally in chrysanthemums, which is tightly bound into the garment, creating an invisible and odorless protective barrier around the wearer. Executives said permethrin is not effective when applied directly to the skin, because it...