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

Fri Jun 5 09:50:18 EDT 2015

Daniela,

What you are describing with the lindens sounds quite similar to what I've
been seeing in Toronto and surrounding areas for a few years now - I posted
about this to CANUFNET a couple years ago, I believe.

Every now and then we come across a linden that seems to have died rather
suddenly (over one or two growing seasons); a tell-tale sign of this
condition seems to be stripped or flaked-off bark in some upper branches, as
well as the epicormic sprouts/larger-than-normal leaves, particularly lower
in the canopy.

I have no idea what it is and upon discussion with a few colleagues, we all
seem stumped. In my experience this mostly seems to affect mature lindens; I
haven't seen it on any young trees myself. 

I came upon one of these just yesterday; here's a link of a couple photos:
http://imgur.com/a/WrZu8 

I have lots of pictures of other similarly-affected lindens that I should
share; it might take me a bit to get them compiled though.

Does anyone out there have any thoughts as to what this could be? Perhaps a
more formal investigation is warranted.

Regards,

Alex

Alex Satel, MFC
ISA Certified Arborist ON-1353A
Urban Forest Innovations, Inc.
1248 Minnewaska Trail
Mississauga, ON L5G 3S5
P: (905) 274-1022
asatel at ufis.ca
urbanforestinnovations.com

-----Original Message-----
From: CANUFNET [mailto:canufnet-bounces at list.web.net] On Behalf Of Danijela
Puric-Mladenovic
Sent: June-04-15 8:21 AM
To: canufnet at list.web.net
Subject: [CANUFNET] response to CANUFNET Digest, Vol 124, Issue 3

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) 

-----Original Message-----
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Sent: Wednesday, June 3, 2015 12:00 PM
To: canufnet at list.web.net
Subject: CANUFNET Digest, Vol 124, Issue 3

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Today's Topics:

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

----------------------------------------------------------------------

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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