[CANUFNET] Ash tree appraisal - do you discount?

[Philip van Wassenaer]

How much do we discount?

 

 

Philip van Wassenaer, B.SC., MFC

1248 Minnewaska Trail

Mississauga, Ontario

Canada, L5G 3S5

Tel:  (905) 274-1022

Cell: (647) 221 3046

Fax: (905) 274 2170

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From: canufnet-bounces at list.web.net [mailto:canufnet-bounces at list.web.net]
On Behalf Of pwynnyczuk at richmondhill.ca
Sent: February-03-12 4:06 PM
To: Canadian Urban Forest Network
Subject: Re: [CANUFNET] Ash tree appraisal - do you discount?

 

Hi Alex, 
At this point in my opinion we do have to discount the species due to the
high susceptibility to  EAB and the added cost of retention through EAB
control/eradication process. 
Unlike DED which is transported by an  insect and the disease may be
contained by the tree or slows down the movement within the tree, if
vigorous. EAB unfortunately out eats any tree containment measures which
leads to the death of the tree. 

Based on the above one less species of value in our pallette. 
Regards,
Peter Wynnyczuk 

Urban Forestry Supervisor 
Town of Richmond Hill 
Community Services Department 
Telephone:  905 780-2930 
Fax:  905 780-2928 
Internet: pwynnyczuk at richmondhill.ca 




From:        "Alex Satel" <asatel at ufis.ca> 
To:        <canufnet at list.web.net> 
Date:        02/03/2012 02:58 PM 
Subject:        [CANUFNET] Ash tree appraisal - do you discount? 
Sent by:        canufnet-bounces at list.web.net 

  _____  




Hi all, 
  
A question for anyone who is involved in preparing/reviewing CTLA-based
appraisals (e.g., trunk formula method) of ash trees: How have you
considered Emerald Ash Borer (EAB) in your valuations of healthy looking
ash? 
  
It would be interesting to see if there is some consensus about how to
proceed; should we start discounting the species ratings because 'all ash
are doomed'? Or should we still consider each tree on its individual merits
and outwardly-visible condition, even though it may already be infested and
not yet showing symptoms? How do we account for the fact that many (if not
most) ash trees will become liabilities once infested/dead? 
  
Personally, I am somewhat hesitant to start discounting still-healthy trees
because of susceptibility to a pest (after all, many elms have survived),
but it is generally accepted that we will lose most of our urban ash trees,
and this may be fair to consider that when assessing value. 
  
Any thoughts and experiences would be greatly appreciated. 
  
Kind regards, 
  
Alex 
  
Alex Satel, MFC
ISA Certified Arborist ON-1353A 
Urban Forest Innovations Inc. 
1248 Minnewaska Trail
Mississauga, ON  L5G 3S5 
T: (905) 274-1022 
 <mailto:asatel at ufis.ca> asatel at ufis.ca 
 <http://www.urbanforestinnovations.com/> www.urbanforestinnovations.com 
Description: UFI new logo very small
  

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