Corn Earworm and Tobacco Budworm - Larval Identification
Corn earworm and tobacco budworm larvae are similar in appearance. Differentiation of the two species is possible, with a hand lens, as
larvae approach 1/2 inch in length.
Close examination of the larvas mouthpart is one way to distinquish the two species. The chewing part or mandibles can be seen above. The
mandibles can be removed as shown below. Upon closer examination the presence or absence of a mandibular process or retinaculum can be determined. A hand lens or dissecting microscope will be need for this
process.
