The adult army worm is a light brownish gray moth or (miller), with a conspicuous white spot about the size of a pinhead on each front wing. When expaned, the wings are about 1 1/2 inches across. Army worm larvae are pale green in the early growth stage and dark green in later stages. Full grown larvae are smooth, striped and almost hairless. They grow to length of 1 1/2-2 inches.
The army worm is primarily a pest of grasses, small grains, crops, alfalfa, beans, clover, flax, millet, and sugarbeets. Feeding and movement occur during the night or on cloudy days. During the daytime, they hide under vegetation, loose soil or in soil cracks. Caterpillars consume more and more vegetation as they grow. Since they feed at night and hide during the daytime, army worms often cause considerable damage before being discovered.
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