Granary weevil, SEM

Granary weevil, SEM

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Caption: Granary weevil. Coloured scanning electron micrograph (SEM) of an adult granary weevil (Sitophilus granarius) emerging from a grain of wheat. Weevils have long, pointed snouts (top right), called rostrums, which have blade-like mandibles for cutting at the tip. Adult female granary weevils chew holes in grains of corn, wheat, oats and barley, and lay an egg in each one. When they hatch, the larvae eat the contents of the grain, before pupating and emerging as adults. An infestation of granary weevils can destroy an entire cargo or silo of grain. Fumigation and improved storage methods help control this pest.

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Keywords: adult stage, animal, beetle, cereal, coleoptera, coleopteran, coloured, damaging, destructive, emerging, entomology, granary weevil, hatching, hatchling, horizontal, insect, insecta, invertebrate, invertebrates, nature, pest, scanning electron micrograph, sem, sitophilus granarius, wheat grain, wildlife, young, zoology

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