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Armyworm
(John Obermeyer, Purdue University)

Common Name: Armyworm

Order: Lepidoptera

Family: Noctuidae

Pest Status: Armyworms can become major pests as they feed on grasses and small grains.

Appearance: The adult armyworm is a light brownish-gray moth with a conspicuous white spot about the size of a pinhead on each front wing. When expanded, the wings measure about 1 inch across.

Life Cycle: In the mid-summer, moths lay their eggs on grass or on grain leaves at night. Within six to 10 days, the eggs hatch and the larvae feed on leaves at night. After approximately one month, the larvae form silk cocoons below the soil surface. In late summer, the adults emerge and mate.

Where to Collect: During the evening, armyworms often can be found feeding on grass. Adults, often called "millers," are commonly collected at lights.