Taking an environmentally sensitive approach to pest management


Missouri Pest Monitoring Network
Fall Armyworm I.D.


Fall Armyworm wings spread, female and male

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

  • Moths have light (male) to dark grayish-brown (female) mottled forewings with light and dark splotches.
  • They have a noticeable white spot near the extreme end of each forewing however it is more pronounced in the male.
  • The hind wing for both sexes is iridescent silver-white with a narrow dark border.
Fall Armyworm wings closed

Identification of larvae (damaging stage)

Fall Armyworm larvae
  • Young larvae are initially dirty white; color may change to light tan or pinkish gray as larvae mature
  • Skin is smooth and free of hairs with numerous round dark spots scattered over top and sides
  • Head is dark brown to black
  • Four prolegs (3rd, 4th, 5th, 6th and 10th abdominal segments)
  • Maximum larvae length is one inch
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REVISED: September 29, 2015