The best defense against Mother Nature is Mother Nature. Introducing STEM Kills Wasps, Hornets and Yellow Jackets – a bug killer for outdoor use. Made with botanical extracts that are safe for you, but deadly for bugs. STEM’s scientists decode the power of nature to use botanical extracts to effectively and safely protect your family and pets from pests (when used as directed)​. STEM plant-based active ingredient bug spray kills wasps, hornets and yellow jackets. Our non-toxic wasp killer is made for outdoor use and is safe for use around kids and pets (when used as directed). Formulated with botanical extracts, it has no added dye, fragrance, or harsh chemical odors. This bug spray safe for use around kids and pets (when used as directed) was tested by entomologists.​ STEM helps protect your family. Rooted in Nature, Optimized by Science.