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24th September 2007, 01:29 PM
| #1 (permalink) |
| Over mature heritage tree  Join Date: Feb 2007 Location: Oregon
Posts: 564
|  Marks in wood: dead oak >> Opinions !! Last Friday, I removed 3 dead oak trees near the east side of Medford, Oregon. Due to how dry the wood was, and how the wood broke on one in-felling, I'm certain they have been dead for at least 3 or more years. One year old home, new owners. No history to go on, other than they are in a fenced off area that is mostly grassy, where water drains down a ditch. Not exactly raparian, but isolated between homes in a cyclone fenced strip like riparian would be. So, these are in my camping firewood pile now. There are several attachments too There are these marks in the wood - very distinct, and they are virtually on the same growth rings, at some points for the tree's life. Can't tell in the images, but each growth ring is about 1/8" thick. The biggest trunk piece would be about 100 years old. Each dark mark is about 3 to 5 growth rings deep, and about 5/8" to 3/4" wide - not including the small "thorn-like" dark part that projects toward the exterior.  With no history on the tree, what do these kind of marks tell you, indicate, or mean to you? From looking at the pile, it seems that the marks were in at least one 4" diameter limb, and at different heights up the trunk. I think the marks may be from one tree. Didn't really catch my attention on the site. I don't recall seeing this in trees I've pruned or removed before. This is not a test. I have no idea what it is, but am very curious due to the distinct pattern. The only tree disease of note in our area, and not quite to our area yet, is Sudden Oak Death, more common in California, and I hear, just started to pop its head up 2 hours west at the coast by Brookings, Oregon, in Azalea Park there. |
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24th September 2007, 04:46 PM
| #2 (permalink) |
| Over mature heritage tree Join Date: Jul 2007 Location: SE USA
Posts: 521
| Re: Marks in wood: dead oak >> Opinions !! I'm guessing insect attack
__________________ Guy Meilleur | Forensic Arborist | Better Tree Care |
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24th September 2007, 05:01 PM
| #3 (permalink) | |
| Over mature heritage tree Join Date: Feb 2007 Location: Oregon
Posts: 564
| Re: Marks in wood: dead oak >> Opinions !! Quote:
We have quite a few wood peckers near here. Could a woodpecker cause something like that? Or insects along with woodpeckers? | |
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24th September 2007, 10:32 PM
| #4 (permalink) |
| PDF King & Arborist Extrodinaire  Join Date: Feb 2007 Location: Townsville Nth Queensland & Gold Coast Sth Queensland
Posts: 1,638
| Re: Marks in wood: dead oak >> Opinions !! They do like remarkably like the dissections of trees with injection/implant wounds in Shigo's A New Tree Biology Fig 40-7 pg527, so I would quess if no such treatments were undertaken (which I think is a pretty sound bet!) then woodpecker is a good candidate..all around the same time too.
__________________ Sean  Trees are poems that earth writes upon the sky, We fell them down and turn them into paper, That we may record our emptiness. - Kahlil Gibran |
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25th September 2007, 02:28 AM
| #5 (permalink) |
| Eric Frei Administrator - Brisbane L5 (Dip) Hort Cert III Arb + some  Join Date: Jan 2007 Location: Brisbane
Posts: 6,815
| Re: Marks in wood: dead oak >> Opinions !! Pretty odd, woodpeckers eh.  Why do they peck the heck out of trees anyway? Might have been something that year they liked. Look like spike marks, but they'd not be so consistent horizontally, be more of a track vertically.
__________________ Remember to use the "search" function, if you have answers/questions post them so everyone can benefit. Free Tree and Green Industry Link Directory Qualified Brisbane Tree Lopping Brisbane Tree Care, Consultations and Arborist Reports Forum Sponsors |
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