armyworm lateral MER copy.jpg

Armyworm moth


  • Adult: Moth that is about 1" long with a 1½" long wingspan. Tan or light brown with a small white spot in the center of each forewing.
  • Larvae: Worm that is dark greenish-brown to black with long orange, white and brown stripes running the length of its abdomen. About 1½" long when mature and have a yellow-brown mottled head.
  • Eggs: Small white globules laid in rows or groups on the lower leaves of plants. 

Timing of damage: All growing season

Type of damage: Defoliation of leaves and head clipping.

Scouting: Check several field locations for larvae among debris on the ground.

Economic threshold: Six or more nonparasitized larvae per row-foot and before head-cutting occurs.

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