Pest ID

  • Seedcorn beetle eggs are oval and white in color.
  • Larvae are tan with a white abdomen.
  • Pupae are cylindrical in shape and are white in color.
  • Seedcorn beetle is yellow brown with a long, rectangular black square in the center of each wing cover.
Photo: Seedcorn beetle

Facts on Seedcorn Beetle

  • Two species of seedcorn beetles occur in the field, namely the seedcorn beetle and the slender seedcorn beetle.
  • Despite their name, seeds are not the primary food source for seedcorn beetles. Rather, they feed primarily on other insects and are actually beneficial when doing so.
  • Damage to corn seeds is more likely in cool, wet springs when the seeds are slow to germinate but the insects are still actively feeding.
  • No-till fields are less likely to have damage.

Life Cycle of Seedcorn Beetle

  • Seedcorn beetles overwinter as adults in soil and crop residue. The adults emerge, mate and lay their eggs in the soil.
  • Seedcorn beetles may feed on slow germinating seed if the environmental conditions are cool and wet.

Management of Seedcorn Beetle

  • Using a seed box treatment at planting can prevent injury.
  • The use of a soil insecticide labeled for control of seedcorn maggot, seedcorn beetles and/or wireworms may also prevent insect damage to seeds.