Bagworms, borers, beetles, spider mites, and more - stop them in their tracks with Captain Jack's Deadbug Brew! The active ingredient in Deadbug Brew is Spinosad, which is derived from a naturally occurring, soil-dwelling bacterium that was collected from an abandoned rum distillery on a Caribbean island in 1982. This unique bacterium was defined as a new species when it was discovered, and it has never been found in nature anywhere else in the world. Since being discovered, Spinosad has been used world-wide in the production of organic produce. Also for use in the lawn and landscape. 32 fl. oz. ready-to-use spray bottle.