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Symptoms
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Star shaped galleries in the stem and in strong branches of older (thick-barked) dying or dead pines; characteristic are 2-5 maternal tunnels up to 1m in length and shorter larval tunnels, which branch in rectangular direction from the maternal tunnels. Later on, tunnels are branched irregularly as a consequence of regeneration feeding by the beetles. Beetles brown, up to 8mm in length, intensly haired; pronotum longer than broad, on the hind end of the elytra left and right each 6 teeth (hand lens!).
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Impact
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Commonly associated with decline of pines (Scots pine as well as Austrian Black pine). Recently (probably as a consequence of the dry year 2003), common in stems of dying Austrian Black pines, but mostly secondary after Diplodia-dieback.
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Control
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Pines with Ips sexdentatus should be removed from the stand, since mass propagation might result in attacks of healthy trees.
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| Hosts |
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Pine;
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| Affected plant parts
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Stem;
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Ips sexdentatus - gallery in young pines
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Ips sexdentatus - gallery in the stem of a Scots pine
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Ips sexdentatus - gallery and larva
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Ips sexdentatus - mating chamber
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Ips sexdentatus - wood shavings
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Ips sexdentatus - dead Austrian Black pines
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