Missouri Pest Monitoring Network
True Armyworm I.D.

Identification of moth
(stage attracted to and captured in traps)

• Wingspan averages 1.5 inches.
• Grayish-brown forewings with a white spot near the center of each wing.
• Grayish-white hind wings

Identification of larvae (damaging stage)

• Greenish brown with a narrow, mid-dorsal stripe
• Yellowish head honeycombed with dark lines
• White-bordered, orange line down each side of the body
• Large, single dark spot at the base of each of the 4 of fleshy abdominal prologs
• Use the orange lines and dark spots at base of prologs to differentiate true armyworm larvae from other armyworm larvae