Seedcorn maggot: Biology and ecology

Seedcorn maggot: Seedcorn maggots, Delia platura, and damge to a soybean seedling.Seedcorn maggot: Seedcorn maggots, Delia platura, and damge to a soybean seedling.

Female seedcorn maggots deposit eggs on the soil during the growing season. The resulting larvae borrow through the soil to feed on developing seeds or organic residue. Female flies are particularly attracted to soils with decaying organic matter (e.g., manure and green plant matter). Seedcorn maggots overwinter as pupae and have about 4-5 generations in northern latitudes and fewer in the south. At a base developmental threshold of 390F (3.90C) It takes about 677 FDD (376 CDD) to complete development from egg to adult. Seedcorn maggots have few generations in the south because of an upper developmental threshold of 840F (28.90C).