Monterey B.t. Insecticide is a natural, OMRI-listed caterpillar control powered by Bacillus thuringiensis (Bt) — a soil-dwelling bacteria that disrupts the digestive system of worm-stage pests on contact. Caterpillars stop feeding within hours and die shortly after. Safe for people, pets, honeybees, and ladybugs when used as directed. Features & Specs Active Ingredient Bacillus thuringiensis subsp. kurstaki strain SA-12 (ATCC #SD-1323) — 98.35% Target Pests Cabbage Looper, Tomato Hornworm, Bagworm, Gypsy Moth, Tent Caterpillar, Fall Webworm, Cankerworms & more For Use On Fruits, Vegetables, Ornamentals, Shade Trees Application Rate Fruits & Vegetables: 1.5 oz / 3 gal / 1,000 sq ft | Ornamentals: 2 oz / 3 gal / 1,000 sq ft Pre-Harvest Interval 1 day Pet Safe Yes, when used as directed