Tree assessment/forest pathology

[Tony Croft aka hamadryad]

Cool Try and get down for that.

 

 

will most likely be the sat 17th september, mid sep is always reliable:thumbup1:

[Fungus]

flat bark = possible Armillaria = noted

 

Rob,

With Quercus robur : yes, with Fraxinus : yes, with Q. rubra : no, with Beech : no (see photo), etc. Tree species with (thin) smooth or "flat" bark develop rough and folded or wrinkled callus and bark. So you have to learn to diagnose the tree species specific bark "body language" as a reaction to an infection with a parasitic Armillaria species.

---

[Sam Thompson]

will most likely be the sat 17th september, mid sep is always reliable:thumbup1:

 

Cool. Whats the venue like? I assume good

[RobArb]

whippendell woods, search in the threads and you won't be disappointed

[RobArb]

Rob,

With Quercus robur : yes, with Fraxinus : yes, with Q. rubra : no, with Beech : no (see photo), etc. Tree species with (thin) smooth or "flat" bark develop rough and folded or wrinkled callus and bark. So you have to learn to diagnose the tree species specific bark "body language" as a reaction to an infection with a parasitic Armillaria species.

---

 

Thanks Gerrit:thumbup:

[sloth]

Again , to be more precise, the effects of the rhizomorphs and/or mycelium of a necrotrophic parasitic Armillaria species, which in invading the cambium of the oak's trunk base through the damaged roots have triggered tree species specific callus and "flat" bark formation, as also can be seen in the following photo's.

---

 

Hi, why exactly does the Armillaria cause the flat bark, as opposed to dead? Is the area of flat bark likely to die over time?

[Fungus]

1. why exactly does the Armillaria cause the flat bark, as opposed to dead?

2. Is the area of flat bark likely to die over time?

 

1. Because the "bark" only is the superficial top layer of the callus or wound tissue, which is trying to overgrow and close the wound from the top and/or from aside.

2. Yes, because the mycelium and/or rhizomorphs stay active behind the newly formed callus, which causes the live wound tissue to die (over and over) again, because the contact with the cambium tissue is interrupted, after which the dead "bark" wound tissue falls off leaving an impression of the rhizomorphs in the dead sapwood behind (see : Fungus albums : Rhizomorphs Armillaria ).

---

[Lorry thompson]

This is a top thread cheers lads:)

[APC]

I can assure you, any compaction here has only been the householders activities, it isnt a NT property, and trees can handle compaction on these levels. So lets add a little LIGHT compaction to the equation, it doesnt alter the outcome or is even a consideration for me in THIS scenario.

 

 

Trees once in woodland now on woodland edge after building of new houses, and subsequent stresses from the development?

[Tony Croft aka hamadryad]

Trees once in woodland now on woodland edge after building of new houses, and subsequent stresses from the development?

 

I have since found out the client got a digger in to terrace the garden many moons ago!