An aqueous extract produced by extracting orange peels with water, wherein orange peels are extracted in the amount of 0.5 to 1.5 cups of water per peel from a single orange, wherein the orange weighs 75 to 100 grams, and wherein the orange peels are extracted at 5 to 95° C. for 6 to 18 hours. The aqueous extract provides a method of killing fire ants by applying the aqueous extract to a fire ant mound in the amount of 0.5 to 1.5 cups of the aqueous extract per amount of fire ant mound that is 5 to 10 inches in diameter and 2 to 6 inches high. The aqueous extract is a safe natural product that is effective in killing fire ants selectively, is easy and inexpensive to manufacture, and can be broadcast safely over a wide area.
