Coloured SEM of a grain weevil on a grain.

Coloured SEM of a grain weevil on a grain.

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Credit: CATH WADFORD/SCIENCE PHOTO LIBRARY

Caption: Grain weevil. Coloured Scanning Electron Micrograph (SEM) of the grain weevil Sitophilus granarius eating a piece of grain. The head of the weevil has a prolonged snout called a rostrum which terminates in powerful mandibles. These are used as boring tools to penetrate succulent inner layers of foodstuff. The antennae of this insect are of unusual design. They are jointed like an elbow and the tips are tucked into a groove on each side of the rostrum. The grain weevil can be a serious pest to shopowners and householders since it feeds on stored products such as rice and cereals. Magnification: x9 at 35mm size. x53 at 8x10 inch size

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Keywords: animal, compound eye, grain, grain weevil, insect, insecta, invertebrate, invertebrates, mandible, nature, of weevil, on grain, pest, sem, sitophilus granarius, weevil, wildlife, zoology

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