[CANUFNET] CANUFNET Digest, Vol 124, Issue 5

Sat Jun 6 21:37:05 EDT 2015

RE: Ulmus spp.
- a great deal of EBB/DED decline and mortal injury have been observed this season. A couple notable cemeteries have lost a great number of their Ulmus spp. And we have quoted numerous Ulmus spp tree removals in the Bathurst & Finch area this season.
- EBB damage is often extensive and though DED is the assumed source of mortal injury, I have pondered if DED was a significant influence. Most cases are revealing all scaffold limbs having extensive nuptial and larval galleries of EBB

RE: Tillia spp.
- for a number of years (i.e. 2006) I have on occasion identified Linden Borer injury with landscape ornamental specimen
- many were located in northern York Region

Kevin 

Advanced Tree Care Inc.
www.advancedtreecare.ca
c. 905.252.3168

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Subject: CANUFNET Digest, Vol 124, Issue 5

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Today's Topics:

   1. Re: response   to CANUFNET Digest, Vol 124, Issue 3 (Alex Satel)

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Message: 1
Date: Fri, 5 Jun 2015 09:50:18 -0400
From: "Alex Satel" <asatel at ufis.ca>
To: "'Canadian Urban Forest Network'" <canufnet at list.web.net>
Subject: Re: [CANUFNET] response   to CANUFNET Digest, Vol 124, Issue
	3
Message-ID: <01f001d09f96$8f6f4810$ae4dd830$@ufis.ca>
Content-Type: text/plain;	charset="us-ascii"

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)

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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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