[CANUFNET] response to CANUFNET Digest, Vol 124, Issue 3

[Danijela Puric-Mladenovic]

Hi John,

 I have noticed  the similar problem  " tress are struggling to fill their canopies this spring "  on little leaf lindens in my home area ( Whitby)
Street trees  little leaf lindens ( planted in 1988) have the similar  issues as you describe -  canopy thinning ;
it seems that  small /thinner branches twigs are affected ; they have no leaves ;
However some trees to compensate for this have produced larger leaves than in the previous years and what is not typical for Tilia cordata; trees also produced many epicormic shoots 
And some trees are just struggling - I would say their foliage is 40 to 50% less than last year  
And these are trees that had  lush and full canopy in the past  ; this year their canopy looks different  
I haven't done any inventory or sampling  or deeper investigation - but since this is a bit systematic trough Whitby ( and my street / neighborhood) I am thinking is that the climate / past two cold winters ( and drought) might be the reason for this.

Danijela Puric-Mladenovic
( OMNRF- Science and Research Branch ---  Faculty of Forestry, University of Toronto) 

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Today's Topics:

   1. Pioneer Homestead and Accolade Elms, concerns. (Hennessy, John)


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Message: 1
Date: Tue, 2 Jun 2015 17:20:59 +0000
From: "Hennessy, John" <John.Hennessy at brampton.ca>
To: "canufnet at list.web.net" <canufnet at list.web.net>
Subject: [CANUFNET] Pioneer Homestead and Accolade Elms, concerns.
Message-ID: <9565E34A71665E458DBF948BEDDAEA4029A19ADD at MB3.brampton.ca>
Content-Type: text/plain; charset="us-ascii"

Hello All. Thank you for the consideration. In Brampton it has come to our attention that many of our young Elms(10-15cm dbh) are struggling to fill their canopies this spring. One issue is the tips of branches have leafed out, however the interior of tree has not produced leaves. Further to this, a second issue would be the apparent black mold ( Wetwood ) on pedestals and in bowl region on other trees. Are others having similar issues? Both of these issues are consistent throughout the city. To date it would appear the Accolade Elm is most affected, with the pioneer and homestead not being.
I am hoping it is related to our spring?
Further to this, these varieties have been deemed "resistant" any opinions or comments on their viability? I continue to monitor, but as we continue to see White elms succumbing to Dutch Elm disease I hesitate to increase percentages.
Any comments or similar experiences are appreciated.

John Hennessy
Forestry Inspector
Municipal Specialist # on1193a

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