UKTC Archive

RE: Drought, trees and fungal activity

Subject: RE: Drought, trees and fungal activity
From: David Lonsdale
Date: Dec 29 2011 10:56:55
Biscogniauxia nummularia widely occurs on beech in southern Britain.  It was 
only after the 1976 drought that we started finding it frequently in strip 
cankers.  Before that drought, we had been finding it mainly on small beech 
trees that had been ring-barked at the base by grey squirrels or other 
mammals.   

We used to accept the myth that functional sapwood was largely free from 
fungi or bacteria, and so we wrongly assumed that B. nummularia was merely 
colonising trees while they were dying from a combination of suppression and 
squirrel damage.  We later found that it was present as an endophyte in the 
sapwood of the tree and can be triggered into activity (wood decay and then 
fruiting in the bark) by various kinds of physiological stress (especially 
drought), often in combination with wounding that leads to aeration of a 
column of sapwood.  In some cases only, this involves strip-cankering.

David L.


-----Original Message-----
From: Rupert Baker [mailto:rupert_baker@xxxxxxxx.co.uk]
Sent: 28 December 2011 12:48
To: UK Tree Care
Subject: RE: Drought, trees and fungal activity


Thanks for that Luke;  i had a quick read.  One query it raised with me was
its reference to Biscogniauxia nummularia; which I see around quite a lot,
but have never associated with the strip cankers it mentions? Perhaps 'cos
I'm in the soft and humid SW of England
Rupert

-----Original Message-----
From: luke steer [mailto:luketreescapes@xxxxxxxxxxx.com] 
Sent: 28 December 2011 12:13
To: UK Tree Care
Subject: Drought, trees and fungal activity

Dear all,

Thos of you following the thread on Ganoderma and wood decay fungi in live
trees may find this FC publication interesting:

http://www.forestry.gov.uk/pdf/fcrn004.pdf/$FILE/fcrn004.pdf

 

Regards

 

Luke Steer

Chartered Arboriculturist

 

Treescapes Consultancy Ltd.

Office:   01539X XXXXX

Mobile: 07734 XXXXXX

Web: www.treescapesconsultancy.co.uk

 




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