UKTC Archive

Ash Die Back - brittleness

Subject: Ash Die Back - brittleness
From: Philip Wilson
Date: Aug 12 2020 06:39:45
'... the Segars Ash ... fell to bits when it hit the ground'.

The brittleness of ash (at least if having symptoms of chalara) has been 
mentioned before, and I suggest a possible contributory factor. Over last 
summer I stacked some firewood outdoors from the branchwood of a late-mature 
ash, which had been in reasonable health. However, when I came to bring it 
under cover last autumn I found that the stack had been densely infested by 
bark beetles (say up to 12 exit holes per square inch).

Here in East Kent ash bark beetles could well have reached atypically high 
population densities, and such an infestation could contribute rapidly to 
brittleness (without the obvious tell-tale, by the way, of the bark falling 
away from the wood). I notice that the Common ash bark beetle (Hylesinus 
fraxini Panz.), if that was the culprit, makes pupal chambers up to 1cm deep 
in sapwood and can also infest relatively dry wood (Munro J.W., 1926; 
'British bark-beetles'; FC Bulletin No.8).

Philip

-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info 
[mailto:uktc-request@xxxxxx.tree-care.info] On Behalf Of 
elsteadbysea@xxxxxxxxxxx.com
Sent: 11 August 2020 15:14
To: UK Tree Care
Subject: RE: Ivy death and Ash Die Back

Richard is correct that ivy was dead on the Segars Ash and has last week was 
felled when it fell to bits when it hit the ground.
Could the ivy die because it getting no sustenance from the tree? Must look 
around when I get out of my cool room.

As an aside I did question how ADB is progressing on the forum recently. 
Almost every tree I see currently that was suffering last year is growing 
back below the dead twigs.
Interesting to see those trees next year whether better or worse.

Phillip

-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info <uktc-request@xxxxxx.tree-care.info> 
On Behalf Of "Staden, Richard"
Sent: 11 August 2020 15:05
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: Ivy death and Ash Die Back

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In his post in relation to 'Trees with the highest risk are the easiest to 
find' Phillip posted a picture of a large dead ash (Segars Ash) which looked 
like it might have had a significant amount of ivy up it. It is now all dead. 
I have been noticing in some of the mature ash that are succumbing to Ash 
Die-back that their attendant Ivy has also died. It is a casual observation 
rather than anything more scientific, and I wondered if others in-the-game of 
tree observation had noticed anything similar?

Richard Staden
Landscape Officer
Conservation Team
Pembrokeshire County Council
01437 XXXXXX

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-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info <uktc-request@xxxxxx.tree-care.info> 
On Behalf Of elsteadbysea@xxxxxxxxxxx.com
Sent: 05 August 2020 15:35
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: RE: Trees with the highest risk are the easiest to find

And how about this one above a small car park!
Checking tomorrow to see if it's been dealt with.

Phillip


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