Orange Guard is a water based, all-natural food grade contact insecticide and residual repellent. It is OMRI (Organic Materials Review Institute) listed as allowed for use in organic production and all ingredients are listed on the FDA GRAS (Generally Regarded as Safe) list. With the active ingredient d-Limonene (orange peel oil), Orange Guard Home Pest Control works by dissolving the exoskeleton of the insect resulting in suffocation. When sprayed into cracks and crevasses, it works as a lasting repellent and flushes out hidden bugs. Orange Guard Fire Ant Control can be used by puncturing, saturating, and filling an ant mound. It may be diluted 3 parts water, to 1 part Fire Ant Control without loss of efficacy.