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<DIV>They died of DED. No damage from construction, or there was no
construction just forest thinning. A response to a change in growing conditions
in their immediate area (I would think an improvement but the trees didn’t think
so).</DIV>
<DIV> </DIV>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR: #000000">Stephen
Smith<BR>Urban Forester, ISA Certified Arborist<BR>Qualified Tree Risk
Assessor<BR>Urban Forest Associates<BR>www.ufora.ca<BR>off 416-423-3387/cell
416-707-2164<BR></DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=gurrb@yahoo.com
href="mailto:gurrb@yahoo.com">Brad</A> </DIV>
<DIV><B>Sent:</B> Thursday, August 09, 2018 8:03 PM</DIV>
<DIV><B>To:</B> <A title=stephen@ufora.ca
href="mailto:stephen@ufora.ca">stephen@ufora.ca</A> ; <A
title=canufnet@list.web.net href="mailto:canufnet@list.web.net">Canadian Urban
Forest Network</A> </DIV>
<DIV><B>Cc:</B> <A title=ABOND@envision-tatham.com
href="mailto:ABOND@envision-tatham.com">Alison Bond</A> </DIV>
<DIV><B>Subject:</B> Re: [CANUFNET] Dutch Elm Disease
tolerance</DIV></DIV></DIV>
<DIV> </DIV></DIV>
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<DIV>Did they die of DED? Or construction related issues? </DIV>
<DIV id=AppleMailSignature>Any stress has lead to increased DED activity my
experience </DIV>
<DIV id=AppleMailSignature> </DIV>
<DIV id=AppleMailSignature>Beetle habitat and activity increases and DED also
increases. Hence the bans on pruning during active beetle periods.</DIV>
<DIV id=AppleMailSignature> </DIV>
<DIV id=AppleMailSignature> </DIV>
<DIV id=AppleMailSignature><BR><BR>Brad </DIV>
<DIV><BR>On Aug 8, 2018, at 10:25 AM, via CANUFNET <<A
href="mailto:canufnet@list.web.net">canufnet@list.web.net</A>>
wrote:<BR><BR></DIV>
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<DIV>We have carried out some projects thinning urban forests with a mix of
native/non-natives including healthy mature white elms and had the elms die
soon after thinning and replanting. Also seen this after construction, even
when they were well protected during construction.</DIV>
<DIV> </DIV>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR: #000000">Stephen
Smith<BR>Urban Forester, ISA Certified Arborist<BR>Qualified Tree Risk
Assessor<BR>Urban Forest Associates<BR><A
href="http://www.ufora.ca">www.ufora.ca</A><BR>off 416-423-3387/cell
416-707-2164<BR></DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=canufnet@list.web.net
href="mailto:canufnet@list.web.net">Alison Bond via CANUFNET</A> </DIV>
<DIV><B>Sent:</B> Tuesday, August 07, 2018 2:31 PM</DIV>
<DIV><B>To:</B> <A title=canufnet@list.web.net
href="mailto:canufnet@list.web.net">canufnet@list.web.net</A> </DIV>
<DIV><B>Subject:</B> [CANUFNET] Dutch Elm Disease tolerance</DIV></DIV></DIV>
<DIV> </DIV></DIV>
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<DIV>Hello Canufnet:</DIV>
<DIV> </DIV>
<DIV>Do you know of any research that indicates whether resistance to DED is
affected by tree health/vigour? Much of what I can find indicates that
trees are being selected based on their resistance to DED but it isn't clear
if the tree is just not susceptible to DED or whether it is actively fighting
the disease. If the latter, one would expect that the tree would be more
prone to infection when it has been otherwise compromised (e.g., new sidewalk
cut into its roots.) Thoughts?</DIV>
<DIV> </DIV>
<DIV>Thank you.</DIV>
<DIV>Alison<BR></DIV><SPAN id=GWSignatureSent
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<DIV><FONT face=Calibri>Alison Bond <STRONG><FONT color=#808080 size=1>BSc MSc
BLA OALA CSLA</FONT></STRONG><BR></FONT>
<DIV><FONT size=1><STRONG><FONT color=#808080 face=Calibri>Landscape Architect
and Certified Arborist</FONT></STRONG></FONT></DIV></DIV><BR><FONT
face=Calibri></FONT>
<DIV><FONT size=1><FONT face=Calibri><STRONG><FONT size=2>ENVISION-TATHAM
Inc.</FONT> </STRONG> </FONT></FONT></DIV><FONT
face=Calibri></FONT>
<DIV><FONT size=1 face=Calibri>115 Sandford Fleming Drive, Suite 200,
Collingwood, L9Y 5A6</FONT></DIV><FONT face=Calibri></FONT>
<DIV><FONT size=1><FONT color=#ff00ff face=Calibri><A
href="mailto:abond@envision-tatham.com">abond@envision-tatham.com</A></FONT><FONT
face=Calibri> I Tel: 705.445.0422 I Fax: 705.444.2327
I <FONT size=1>Cell: 705.994.2059 </FONT>I </FONT></FONT><A
href="http://www.envision-tatham.com"><FONT size=1
face=Calibri>www.envision-tatham.com</FONT></A></DIV><FONT
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