Many pests that we call worms are actually caterpillars. For instance, the bag worm, corn earworm, cabbage worm, and tomato hornworm are all caterpillars. The good news is because these “worms” are really caterpillars, it allows us to use an effective organic pest control that is mainly effective on caterpillars known as Bacillus thuringiensis, also known as BT. When BT is sprayed or dusted on plants it produces a protein that is toxic to caterpillars but is not harmful to humans, or animals.
Growing Home - Worms and Caterpillars
