Non-chemical: Hand-picking the worms in home gardens often provides satisfactory control. In addition to tomatoes, hornworms may also feed on eggplant, potatoes, and peppers. If left unchecked, they may destroy the plant. Often they remain undetected until considerable feeding has occurred. They are often difficult to find because their color blends in or camouflages with tomato foliage background. Only the larvae feed on tomato plants, but during their development, they can consume large quantities of foliage and may grow up to 3-4 inches long. The eggs hatch in about one week and the new larvae feed for a few weeks. Hornworm HabitĪdult moths appear in May and June and fly about at night, depositing greenish yellow eggs singly on the lower sides of leaves. They are large, green, white-barred worms with a slender horn pointing upward at the rear end. Hornworms are the larvae of hawk- or hummingbird-like moths and are commonly found on tomato plants.
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