Description and Biology
The complete life cycle of the corn earworm consists of egg, larva, pupa, and adult. Adults are light to dark brown, or light olive green moths with a wing span of about 1 1/2 inches (Figure 1). The wing color pattern of the earworm moth can be highly variable. Eggs are about half as large as a common pinhead, globular, and vary from light yellowish green to dusky brown. Newly hatched larvae are yellowish white with black heads. Larvae, when full grown, are about 1 1/2 inches long with conspicuous cream, yellow, brown, slate, or black stripes on pink, green, cream, or yellow backgrounds (Figure 2). The pupae, or resting stage, are reddish brown and about oneinch long.