Safer® Brand Caterpillar Killer® Concentrate eliminates caterpillars and worms, including corn earworm, bollworm, diamondback moth, hornworms, loopers, melonworm, tomato fruitworm, tobacco budworm, salt marsh caterpillar and many more. This powerful b.t. formula provides enough product to treat row plantings, making it ideal for commercial applications. Using DiPel® (bacillius thuringiensis var. Kurstaki), the concentrated formula, once ingested by the caterpillar or worm, kills it within a few days.