[CANUFNET] Mystery linden disease

[Alex Satel]

Hello CANUFNET,

 

About a year ago I began noticing a peculiar affliction affecting two mature
littleleaf linden (Tilia cordata) trees in an older neighbourhood in
Toronto. Symptoms appeared as the leaves first wilting, then falling off.
Both trees also sprouted very heavily near the base and in the lower canopy,
as if responding to some shock. This year they are completely dead. The
disease (or whatever it is) appeared to progress very quickly.

 

Being that the trees are located at a frat house, I figured they might have
been poisoned as a prank, but the grass is very green below (no herbicide
injury, then.) and I noticed another linden in the same area with the same
symptoms, now also dead. Verticillium wilt might also be a culprit? 

 

Anyhow, today, while touring through a much younger community (1970s), I
noticed many of the lindens in the area showing similar symptoms - some had
stunted and wilting foliage, while others were totally dead.

 

It's a bit puzzling. Anyone have any insight on what might be causing this
in what is supposed to be a fairly hardy urban tree? Anyone else noticing
this on their lindens? 

 

Cheers,

 

 

Alex Satel, MFC
ISA Certified Arborist ON-1353A

Urban Forest Innovations Inc.

1248 Minnewaska Trail
Mississauga, ON  L5G 3S5

T: (905) 274-1022

 <mailto:asatel at ufis.ca> asatel at ufis.ca

 <http://www.urbanforestinnovations.com/> www.urbanforestinnovations.com

Description: UFI new logo very small

 

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