What killed the tree?

[kenkew]

First 2 pic's show a dead tree. Third pic shows bugs which live under the dead bark, but the killer is what ever made the holes.

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[kenkew]

[star]

We have a lot of trees in our very local woodland with holes just like these Ken,

Maybe this is the culprit http://www.defra.gov.uk/planth/pestnote/citruspics.htm

[Paulines7]

What sort of tree is it Ken.  Although there are oak leaves shown in the first picture, they look as though they are on a neighbouring oak.  The tree in question looks fairly old.  Could it be that the younger oak is taking up all the nutrients and water?  Can you get a close up picture of the beetles on the tree please?

[kenkew]

Under the dead bark are hundreds of woodlice. The beetle that made the holes I've not found yet.

[kenkew]

Some big holes. Some small.
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[tonybloke]

the holes look like woodpecker damage, they'll be after the grubs.  ;)

[OllieC]

I'm with Tony (not in the biblical way!) - the holes are from a pecker of wood... unless it was you who made the holes to pour in the glyphosate?!?!

[Robert_Brenchley]

The small neat holes are beetles, the bigger ones are woodpecker. But something else probably killed the tree; beetles like rotting wood in the main.