<HTML><HEAD>
<META name=Generator
content="Novell Groupwise Client (Version 14.2.2 Build: 128215)">
<META content="text/html; charset=utf-8" http-equiv=Content-Type></HEAD>
<BODY style="FONT: 10pt Segoe UI; font-size-adjust: none; font-stretch: normal"
dir=ltr>
<DIV dir=ltr>
<DIV style="FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR: #000000">
<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>www.ufora.ca<BR>off 416-423-3387/cell
416-707-2164<BR></DIV>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV style="FONT: 10pt tahoma">
<DIV> </DIV>
<DIV style="BACKGROUND: #f5f5f5">
<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>
<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV
id=GroupWiseSection_1533666279000_ABOND@envision-tatham.com_6D9784A083F10047889340061400B217_
class=GroupWiseMessageBody>
<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
style="MARGIN-BOTTOM: 5px; PADDING-LEFT: 0px; DISPLAY: block; PADDING-RIGHT: 0px"><SPAN
style="DISPLAY: block"><BR><SPAN
style="FONT-SIZE: 10pt; DISPLAY: inline-block; -ms-word-wrap: normal"><FONT
size=2 face="Arial Narrow">
<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 face=Calibri></FONT>
<DIV><FONT face=Calibri></FONT> </DIV><FONT face=Calibri></FONT>
<DIV><SPAN
style='FONT-SIZE: 8pt; mso-fareast-font-family: "Times New Roman"; mso-bidi-font-family: "Times New Roman"; mso-ansi-language: en-us; mso-fareast-language: en-us; mso-bidi-language: ar-sa'><FONT
face=Calibri>This email may contain confidential and/or privileged information
for the sole use of the intended recipient.<SPAN
style="mso-spacerun: yes"> </SPAN>Any review or distribution by others is
strictly prohibited.<SPAN style="mso-spacerun: yes"> </SPAN>If you have
received this email in error, please contact the sender and delete all
copies.</FONT></SPAN></DIV>
<DIV> </DIV></FONT></SPAN></SPAN></SPAN><SPAN
style="MARGIN-BOTTOM: 5px; DISPLAY: block"><BR></SPAN></DIV></DIV></DIV></DIV></BODY></HTML>