They feed on the leaves and fruit of plants. Two species damage tomato. General color is green with white diagonal lines on its side. Prominent horn on rear gives name to the group. Larvae measure up to 4 inches long.
Damage is done by larvae eating foliage and sometimes fruit on eggplant, pepper, and tomato.
It passes the winter as a pupa, which gives rise to the hawk moth during late spring. Pupal stage lasts about 3 weeks, except for the overwintering generation. Control hornworms with Sevin or Thiodan insecticides. Organically speaking, Bacillus Thuringiensis will eradicate the pest. Hand picking is very easy, seeing how this plump little guy is simple to grab on to.