To make a simple homemade termite spray, mix soap flakes and water. A solution made from Borax and water may also be sprayed over a colony to kill subterranean termites, or sprayed or painted onto wood to prevent termite infestations.
Borax can also be used in its powder form to control termites, and homemade termite bait is made by mixing two parts borax, two parts confectioner's sugar and one part cornmeal. Natural oils, such as orange, cedar, neem and eucalyptus oil, can also control termites and are non-toxic to humans and pets. Other home treatments for termites include cucumber peels, mint leaves and food-grade diatomaceous earth.