When fully grown, hornworm caterpillars (larvae) can be up to four inches in length and easily seen. These insects can also feed on solanaceous weeds such as horsenettle, jimsonweed and nightshade.Īppearance: You can easily identify hornworms by their blue-green color and large size.
Tomato and tobacco hornworms feed only on solanaceous plants (i.e., plants in the nightshade family), most typically tomato and less commonly eggplant, pepper and potato. However, large numbers of larvae can occasionally occur in home gardens, leading to significant damage. These insects do not typically cause significant damage in commercial vegetable fields. sexta) are large, blue-green caterpillars (larvae) with a spine (horn) on the posterior (rear) end. Tomato hornworms ( Manduca quinquemaculata) and tobacco hornworms ( M.
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