Contains a naturally occurring biological insecticide (Bacillus Thuringiensis) for controlling tent caterpillars, gypsy moths, tomato hornworms and other leaf eating caterpillars on trees, shrubs and vegetables. Natural, biodegradable, and spares beneficial insects. Use until the day of harvest. Easy-to-mix liquid concentrate. OMRI (Organic Materials Review Institute) listed. 16 oz plastic bottle.