Tobacco hornworm: Manduca sexta (Linnaeus)
Tomato hornworm: Manduca quinquemaculata (Haworth)
Hornworms (sphingid larvae) are found feeding on leaves in vineyards. Larvae may be brown or green with spots on the sides of the body and a distinctive “horn” on the rear end. The larvae can grow to 5 inches (12 cm) long, and they feed voraciously during development. Because of this, hornworms are more of a concern in young vineyards with limited leaf area. Larger vines can usually tolerate some leaf area loss from their feeding.
The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the AgBioResearch, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.