[CANUFNET] white blotches on Norway maples

[SVescio at thunderbay.ca]

Hi Peter,
I checked with Dr. Leonard Hutchison, who is a mycologist in the Faculty 
of Natural Resources Management at Lakehead University and he suggested 
that it could be some sort of crust fungus (Corticiaceae).  He said that 
it was only a guess because without a specimen in hand, it was impossible 
to know for sure.  Dr. Hutchison said that if it was a crust fungus, then 
it would be causing decay in the branches. Hope that helps.
Shelley




From:   "Shields, Peter" <Peter.Shields at davey.com>
To:     "Canadian Urban Forest Network (canufnet at list.web.net)" 
<canufnet at list.web.net>
Date:   22/11/2012 07:58 PM
Subject:        [CANUFNET] white blotches on Norway maples
Sent by:        canufnet-bounces at list.web.net



Has anyone seen this?  I was sent a picture from multiple trees in Ottawa 
asking to try and ID this.  Apparently throughout the crowns randomly and 
spongy underneath.  Does not look like a lichen but could be wrong.  Trees 
are stressed too.  It’s kind of fun trying to diagnose from such a small 
caption!
 
Peter Shields
Board Certified Master Arborist, ISA BCMA ON 0570B
Certified Tree Risk Assessor, ISA PNW CTRA #1590
Forest Technician
ASCA Member
Butternut Health Assessor,  OMNR BHA #252
Davey Resource Group, A Division of Davey Tree Expert Company
Cell (647) 465-4901
 [attachment "IMG_2855.jpeg" deleted by Shelley Vescio/TransWks/CTB] 


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