[CANUFNET] Ash tree appraisal - do you discount?

[pwynnyczuk at richmondhill.ca]

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
asatel at ufis.ca
www.urbanforestinnovations.com

 
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