Grain borers

dominica, lesser grain borer.
Prostephanus truncatus, larger grain borer.

Nature of damage

  • Affects both stored grain and maize ears in the field.
  • Insects bore into and feed on the grains.


  • Adults produce floury dust as they feed.
  • Presence of dust on the damaged grains.

Geographic distribution

Primarily in the tropics and subtropics.

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