<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><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"><br></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"><br></div><div id="AppleMailSignature"><br></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><blockquote type="cite"><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>
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<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>
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<div>Hello Canufnet:</div>
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<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>
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