16 oz., Concentrate, Thuricide BT Killer. Contains .8% Kurstaki. Certified Organic Thuricide is a liquid formulation of bacteria, Bacillus Thuringiensis (Bt), which is specific to leaf eating caterpillars. Controls caterpillars, loppers, cabbage worms, and leaf rollers. Pint treats 10,875 square feet of coverage. Insects stop feeding, and die within 2 to 3 days of consuming product.