Tomato Hornworm is the pests that feed on nightshade (solanaceae) family. Their victims include tomatoes, tobacco, eggplants, pepper, and potato. So if you love growing tomato plants be aware of these pests. There are many ways to get rid of them, one of the simplest ways is to hand pick them off the plants. A much smaller enemy of the hornworm is Bacillus thuringiensis, a bacteria that produces an insecticidal protein that can be sprayed or dusted on crops. These environmentally friendly, organic pest control products kill damaging caterpillars, but rarely harm beneficial species. One can also take advice from Exterminator Trumbull CT at http://www.yalepest.com/trumbull-pest-exterminators
to get them more information on how to keep their plants healthy an pest free.