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Hi Cindy & All, Jan 18, 2010
Those horizontal borings are 'exactly' the workings of some beetle;
larval or adult ? No doubt Chris or Dave M can narrow the field to species
level. Very curious and photogenic. I will go out on a twig and guess that
it might be a Bostrichidae.
Those curious ridges are scars that arise when insect tunnels are
covered over by, I assume, cambial activity that is somehow stimulated by
the initial injury. I have never seen such elegant almost sine waves as
these but have seen less regular 'wooden eskers' in Poplar, Red Maple and
White Birch. Was this tree a Poplar ?
Yt, Dave Webster, Kentville
----- Original Message -----
From: "Cindy Creighton" <cindycreighton@gmail.com>
To: <naturens@chebucto.ns.ca>
Sent: Monday, January 18, 2010 12:58 AM
Subject: [NatureNS] Horizontal Bore Holes in Dead Tree
> Hi All:
>
> We were in the woods today and came across this dead tree with unusual
> horizontal lines on it, which covered the entire trunk from top to
> bottom. I wonder if someone can tell me exactly what made these lines
> on a dead tree, or perhaps they were what killed the tree in the first
> place. There is a single "bore" hole near most of the horizontal
> lines. I was wondering if this could be the handiwork of a spruce
> budworm or something similar? The second picture shows the single
> hole next to the lines better. There is also a raised squiggly
> vertical line - wondering what this is too. Thanks for any help.
>
> Pic 1:
> http://www.pbase.com/cindycreighton/image/121184333/original.jpg
>
> Pic 2:
> http://www.pbase.com/cindycreighton/image/121184334/original.jpg
>
> Cindy Creighton
> Springhill, NS
> cindycreighton@gmail.com
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