If you see some with white sacs hanging on their backs you can leave them as they have been parasitized by a wasp and they will die shortly. Tomato Hornworm Art Papayanopulos Tomato Fruitworm Art Papayanopulos 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. They affect the older leaves near the ground first and then move up causing younger leaves to die and fall. The disease spores overwinter on plant debris and are splashed onto new leaves by rain. A thorough garden cleanup, combined with crop rotation, mulch and ample ventilation will help.