Monterey ready to use caterpillar killer spray. Controls caterpillars with no effect on birds, earthworms, honeybees, ladybugs, and other beneficial insects when used as directed. Caterpillars eat treated foliage then immediately stop feeding and damaging plants. For use on fruits, vegetables, ornamentals, and shade trees. Can be used on edible plants up to the day of harvest. Effective on armyworms, bagworms, cabbage loopers, fall cankerworms, gypsy moths, hornworms, tent caterpillars, and more. Active Ingredient: Bacillus Thuringiensis. OMRI (Organic Materials Review Institute) listed for organic gardening.