corn earworm kernel damage 3 MER copy1.JPG

Corn earworm

Description

  • Adult: Nocturnal moths with buff-colored forewings that have dark lines or spots on the tips.
  • Larvae: Vary greatly in color from light green or pink to black and have alternating light and dark stripes running the length of the body. At maturity, 1½" long.
  • Eggs: Tiny hemispherical and ribbed and are laid singly on the leaves of plants, especially young leaves.
     

Timing of damage: R1 to R7

Type of damage: Defoliation, deflowering and depodding.

Scouting: Use a beat cloth or sweep net to take at least one sample per four acres of field. Avoid taking samples close to field edges, as populations are usually higher there.

Economic threshold: One to two worms per row foot.

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