Taking an environmentally sensitive approach to pest management


Missouri Pest Monitoring Network
True Armyworm I.D.


True Armyworm wings spread

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

    True Armyworm wings closed
  • 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)

True Armyworm larvae
  • 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
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REVISED: September 29, 2015