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Seedcorn maggot (Delia platura) is an occasional pest of seedlings, particularly during cool damp weather in fields with high plant residue or organic matter. Light-colored larvae grow to ¼ inch long with blunt tails. They have a pointed head but lack a distinct head capsule. Pupae are about 1/6 inch long, brown, and generally football-shaped. Seedcorn maggot feeding on seeds and seedlings results in stand loss and weak seedlings.

Seedcorn maggot

(Photo: Ric Bessin, University of Kentucky)

Management:

• Planting dates can be adjusted to avoid peak emergence of seedcorn maggot flies.
• Plot and prepare fields at least 3 weeks before planting; seed treatments can be effective. 

• There are no rescue treatments after injury occurs.

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