Marrone Bio Innovations Inc. (MBI), a global provider of natural products for the agricultural and water treatment markets, announced that the U.S. Environmental Protection Agency has approved a dry formulation of Zequanox (registration number 84059-15), a biological product for controlling invasive mussels within enclosed systems and infrastructures. Zequanox is the first biopesticide available for controlling invasive zebra and quagga mussels, which are crippling industrial and commercial operations by restricting water flow in heat exchangers, condensers, fire suppression systems, and service and cooling water systems, as well as by damaging other infrastructure and equipment.