I agree with Elaine. First impression is trunk girdling. Collars or wires or something is usually placed around the trunk at about that height when a tree is planted. Helpful at first, these things tend to get forgotten and not removed in a timely fashion.<br><br>On Monday, 30 May 2016, Ethier Elaine <<a href="mailto:elaine.ethier@umontreal.ca">elaine.ethier@umontreal.ca</a>> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
Was the tree rolled around ? planted in a heat wave, was there a desiccant applied? Was the tree staked at any time with coil attachments, (ligature) on the bark and cambium ?<br>
I agree with a possible mechanical problem and would investigate when, how it was planted and what kind of stress it had other than lots of water. Trimming will need regular management to recreate a stem leader but will most certainly have a structural weakness.<br>
<br>
<br>
Elaine Ethier<br>
<br>
<br>
> Le 30 mai 2016 à 11:39, Michael Richardson <<a href="javascript:;" onclick="_e(event, 'cvml', 'mrtree@kos.net')">mrtree@kos.net</a>> a écrit :<br>
><br>
> It is most certainly not oak wilt. There is no (known) oak wilt in<br>
> Ontario and it does not look like your leaves.<br>
><br>
> I am tempeted to suspect root/root-collar damage but of course this is<br>
> simply a guess without evidence. I would be examining the root collar and<br>
> the area between the live and dead portions of the tree.<br>
><br>
><br>
>> Hi everyone<br>
>><br>
>> I'm visiting family in Windsor Ontario and my aunt has a Quuercus robur<br>
>> 'Fastigiata' The top is dead from the top to about one meter from the<br>
>> ground. The tree did non leaf out this spring except for the bottom meter<br>
>> of the tree. I know the weather has been wet in the summer in the Windsor<br>
>> area the last few summers. I believe it is anthracnose or oak wilt. It<br>
>> looks like anthracnose but not sure if the disease would cause 80% of the<br>
>> tree to die. I suggested to prune the dead out and let the tree grow from<br>
>> the base but if it is oak wilt I don't want it to spread to there other<br>
>> oaks. Has anyone else had this problem in the area from the wet weather.<br>
>> Or dose anyone know what we are dealing with. The picture is a few leaves<br>
>> from the part of the tree That did leaf out this year and the disease is<br>
>> only on about 10 % of what is left alive.<br>
>><br>
>><br>
>><br>
>><br>
>><br>
>> Thank you<br>
>><br>
>> Shawn Riberdy<br>
><br>
><br>
</blockquote><br><br>-- <br><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div>Oliver K. Reichl, B.E.S.(Hons)<br>Principal / Consulting Arborist-Ecologist*<br></div><div>Arborsphere Arboriculture & Urban Forestry Consulting<br></div><div>18 Larue Mills Road<br></div><div>Mallorytown, ON, K0E 1R0<br></div>Tel: <a href="tel:613-923-8833" value="+16139238833" target="_blank">613-923-8833</a><div>Web:<a href="http://www.oliverkilian.com/treecare" target="_blank"> www.oliverkilian.com/treecare</a>, <a href="https://www.facebook.com/pages/Oliver-K-Reichl-BESHons-Consulting-Arborist/192125024193992" target="_blank">Facebook</a><br><br><span><span><span><span></span></span></span></span><img src="https://docs.google.com/uc?export=download&id=0B7SSfng8pgSwX2lYNmFmcDB5NGc&revid=0B7SSfng8pgSwcWNIdytURVc4ZGNnQmoreW9jeGRnUzlTTTNvPQ" height="41" width="200"><br></div><div><font size="1">* ASCA Registere</font><font size="1">d C</font><font size="1">onsulting Arborist #553<br></font></div><div dir="ltr"><div><font size="1"> ISA Certified Arborist #ON-1178A<br></font></div><div><font size="1"> Ontario Butternut Health Assessor #039<br></font></div><div><font size="1"> ISA Tree Risk Assessor Qualified<br></font></div><font size="1"> OUFC Heritage Tree Inspector</font></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><br>