Seedcorn Maggot

Delia platura

Seedcorn maggot on a small seedling
Seedcorn maggot on a small seedling. Photo courtesy of Whitney Cranshaw. Licensed under CC BY 3.0.
The seedcorn maggot is an early season pest of a variety of seeds and seedlings, including corn, soybeans, and onions.
Seedcorn maggots are very small (1/4" when full grown). They are legless and do not have a defined head. They are white in color.
Seedcorn maggots burrow into seeds and occasionally seedlings, killing the plant.
There are no rescue treatments, the only recovery option is to replant. Seed-applied insecticides provide control of seedcorn maggots. Always read and follow all label instructions.