8 oz conc. A natural bacteria better known as BT is the best resort for killing leaf eating worms and caterpillars without resorting to harsh chemicals. Non-toxic to birds, bees, pets or humans, it is often used by organic gardeners to effectively control leaf eating caterpillars, loopers, cabbageworms, hornworms, leaf folders, leaf rollers and gypsy moths. Mix1-4 teaspoons per gallon of water and spray thoroughly to the upper and lower leaf surfaces at the first sign of infestation. Repeat at weekly intervals as needed. There is no residue problem and may be applied up to the day of harvest. This 8 oz. bottle will treat over 5,000 sq. ft.