The best defense against Mother Nature is Mother Nature. Meet STEM Kills Fruit Fly Trap – a fruit fly killer for home use made with botanical extracts that are safe for you, but deadly for bugs. STEM's scientists decode the power of nature, scientifically optimizing it into effective bug-fighting forms.STEM indoor fly trap attracts fruit flies and kills them. This fly insecticide was tested by entomologists and is safe for use around people and pets (when used as directed). It has no added dye, fragrance, or harsh chemical odors. Starts working immediately and lasts up to 21 days.STEM helps protect your family. Rooted in Nature, Optimized by Science.