tomato hornworm

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The green caterpillar of a North American hawkmoth (Manduca quinquemaculata) that feeds on the leaves of solanaceous plants, especially tomato and tobacco.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun large green white-striped hawkmoth larva that feeds on tomato and potato plants; similar to tobacco hornworm