UKTC Archive

RE: Contact Stress Response

Subject: RE: Contact Stress Response
From: Rupert Baker
Date: Sep 12 2018 21:35:51
Hi Ian ,
Nice to hear your (digital)voice again.
Re the Gleditsia, is there any way you can get an angle grinder in and cut 
the collar in 2 or 3 places; allowing little bridges of cambium to keep the 
trees alive until they callus over the ring and start proper vascular 
conduction again?
PS you might like this photo from a stately home near Exeter; the tree is 
surviving....planted 1859..
All the best

Rupert

-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info <uktc-request@xxxxxx.tree-care.info> 
On Behalf Of Brewster, Ian
Sent: 12 September 2018 09:32
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: Contact Stress Response

Hi Guys,

It has been a few years since I last posted and hope all are well.

We have an interesting case regarding Gleditsia triacanthos which I would 
like to share with the collective.

Several trees of the above where planted approximately 30 years old in a 
precinct, these have grown within cast iron grates and steel cages.
They have enveloped the collar at the steel cage base. The cage has been cut 
away leaving the lower steel brace at the tree base.
The tree has reacted to this by Contact Stress Response. It cannot be removed.

Question: will the tree survive the girdling caused by the collar, or will it 
fail?

Picture below of same tree before we became involved and cage removed.
[cid:image003.jpg@01D44A7B.6CEE81F0]
Hi Guys,

It has been a few years since I last posted and hope all are well.

We have an interesting case regarding Gleditsia triacanthos which I would 
like to share with the collective.

Several trees of the above where planted approximately 30 years old in a 
precinct, these have grown within cast iron grates and steel cages.
They have enveloped the collar at the steel cage base. The cage has been cut 
away leaving the lower steel brace at the tree base.
The tree has reacted to this by Contact Stress Response. It cannot be removed.

Question: will the tree survive the girdling caused by the collar, or will it 
fail?

Picture below of same tree before we became involved and cage removed.
[cid:image003.jpg@01D44A7B.6CEE81F0]
NPS
 



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