seedcorn maggot adult 1 copy.jpg

Seedcorn maggot fly


  • Adult: Small, gray, bristly fly with black legs. It is less than ¼" long.
  • Larvae: White to yellow-white maggot with tough skin, pointed head and round tail.
  • Eggs: Laid singly or in clusters in moist soil; each female lays an average of 270 eggs.

Timing of damage: VE to V4

Type of damage: Maggots burrow into seeds and eat the germs, reducing stands.

Scouting: Dig up ungerminated seeds and look for maggots. 

Economic threshold: None established; however, seed treatment is recommended if planting into 
heavily manured or high-residue fields.

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