The Bonide Thuricide (BT) is a liquid formulation (15%) of bacteria that controls caterpillars, loopers, cabbage worms, horn worms, leaf folders and leaf rollers. One concentrated PINT treats up to 10,875 sq. ft of your hydroponic or horticultural system. Also Boncide Thuricide won't harm beneficial insects. Not for Sale in CA and DC at this time.EPA Reg. No. 4-226.