Milky spore powder is a naturally occurring microscopic bacteria that kills Japanese beetle grubs before they can grow into ravenous adults. It is a long term solution because it survives winter temperatures. The milky spore population increases each year, reaching peak effectiveness about three years after application and lasts ten years or more. For use in lawns, garden and around the home. Treat 2500 square feet area. Safe to use around water ways. Organic and ready to use. Available in 10-ounce shaker. Keep out of reach of children.