European spruce bark beetle larvae, SEM

European spruce bark beetle larvae, SEM

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Caption: European spruce bark beetle larvae. Coloured scanning electron micrograph of tunnelling larvae. An inseminated female European spruce bark beetle (Ips typographus) will bore into tree bark and gnaw out a central passage with a number of niches. In each niche an egg is laid. The eggs hatch and the larvae, rather than boring deeply into the wood, stay in the nutritious living region of the inner bark, where each chews out a tunnel for itself. The larvae gradually spread out from the egg site and they make a pattern of tunnels which is more or less constant for each species. These beetles can be serious pests: the elm-bark beetles, for example, spreads Dutch elm disease. Magnification: x12 at 6x7cm size.

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Keywords: animal, bark, bark beetle, beetle, dutch elm disease, european spruce bark beetle, fauna, in bark, insect, insecta, invertebrate, invertebrates, ips typographus, larva, larvae, nature, scanning electron micrograph, scolitidae, sem, wildlife, zoological, zoology

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