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On our patio we've got a piece of old tree (sycamore) trunk which has got some 8mm holes drilled in the upper end. I've just noticed (it wasn't there yesterday) that in one of the holes there's a largish insect burrowing further down into the hole. It's producing a pile of sawdust on the surface, surrounding the hole. I assume the insect is making a nest. What is the insect likely to be? If it's harmless to human life (or our bungalow) I'll leave it alone, but if it's not then I'll give it a dose of insecticide powder.
Last edited by: L'escargot on Thu 6 Sep 12 at 09:36
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