Sun scald? What do you think?

[Dak]

Hey guys and girls,

 

Just wondered what's cause this necrosis? of this beeches bark?

The line of beeches have been sided up and I'm wondering if this has caused sun scald?

What ya reckon?

[Tony Croft aka hamadryad]

vuileminia comedans?

[Fungus]

  hamadryad said:

Vuilleminia comedens?

 

Vuilleminia does not cause bark necrosis, it is one of the saprotrophic pioneer bark "peelers", which only loosens the bark from the cambium, which died of other causes. This looks like the end phase of sun burn or scald. See the photo's, the last photo shows the end phase with Split-Gill (Schizophyllum commune) on the dead sapwood.

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Edited July 24, 2011 by Fungus

[Tony Croft aka hamadryad]

look closely and you can see armillaria rhizos too

[Fungus]

  hamadryad said:

look closely and you can see armillaria rhizos too

 

Where ? In the first photo or in one of mine ? If in mine, the black layers coming from underneath the bark are not rhizomorphs or plaques of Armillaria, but crusts of the not yet reproductive phase of Diatrype stigma.

[ScottF]

Severe case of beech bark disease (Nectria spp.) I would have thought

[ScottF]

Any squirrel damage further up in the crown? Tree rats are a known vector

[Tony Croft aka hamadryad]

[Fungus]

  ScottF said:

Severe case of beech bark disease (Nectria spp.) ...

 

... which spores need an entry spot, i.e. mostly is triggered by the first damage to the bark caused by sun burn or scald after sudden overexposition.

[Fungus]

  hamadryad said:

[attach]71382[/attach]

 

Even at 150 % enlargement and considering the height, to me this looks like a vertical crack in the trunk.