The tomato hornworm is a large caterpillar that eats the leaves of tomatoes, eggplants, peppers, and potatoes. If he pays a visit to your garden, he can cause your plants to form underdeveloped fruits. He is called a hornworm because at the end of its' body there is a red or black horn.

If you are having problems with hornworms in your garden the best thing to do is allow wasps to lay eggs on them. Wasp larvae love to eat the hornworms.