Tree assessment/forest pathology

[Tony Croft aka hamadryad]

Good point , though in a small country like The Netherlands, urban trees are much closer to woodlands and forests then in the U.K., resulting in that the flat foot fly is quite often found on G. lipsiense in urban environments too.

 

In the U.K it really isnt a reliable indicator, it just doesnt present itself in ALL G.lipsiense territories, but this year has seen a boom in the flat foot fly, maybe as with bats this year the tide for nature is on the turn, the awareness is increaing and the vital issues are being adressed, lets hope:thumbup1:

[sloth]

Hope this is an appropiate thread, if not any mods feel free to move it.

 

I noticed this oak on the roadside in winter with 'bleeding' from ground level up to maybe 20-30 feet. should maybe have got better pics of it wonder if it goes to high to Armillaria, but dont about Phytophthera in this area?

It sits on the edge of a large predominantly oak woodland, seperated from the road by a grass verge, next to an old access gate. All the trees around it look healthy. Sorry, I forgot to take a context shot.

The crown of this tree looks rather sparse, and has quite a lot of what I think is green oak tortrix low down. The attached pic is of FB's which were prevalent under this oak, but not the others nearby. I have looked through my Rogers, but sent Kiezers off to RobArb, and have an idea or two, but dont really know what it is.

So, those in the know, care to shed any opinions/ideas? I could try and get more shots at a later date when passing if it helps

[Fungus]

I noticed this oak on the roadside in winter with 'bleeding' from ground level up to maybe 20-30 feet. wonder if it goes to high to Armillaria, but dont about Phytophthera in this area?

It sits on the edge of a large predominantly oak woodland, seperated from the road by a grass verge, next to an old access gate. All the trees around it look healthy. Sorry, I forgot to take a context shot.

The crown of this tree looks rather sparse, and has quite a lot of what I think is green oak tortrix low down. The attached pic is of FB's which were prevalent under this oak, but not the others nearby. I have looked through my Rogers, but sent Keizers off to RobArb, and have an idea or two, but dont really know what it is.

 

Sloth,

As black or frothy oozing, caused by (rhizomorphs of) Armillaria species, at 60-90 centimetres height is possible (see photo with former oozing spot top left at 1 metre plus), an infection and blockage of the living tissue below the secretion spot can not be excluded. Was the flux smelling acid or neutral and where any insects observed on it ?

The mushroom most probably is Mycena pura, a species decomposing litter on the forest floor, which is unrelated to the tree.

[sloth]

Thank you, thought it was a mycena. As for smell, I didn't notice, will stop next time I drive by

[sloth]

Sloth,

As black or frothy oozing, caused by (rhizomorphs of) Armillaria species, at 60-90 centimetres height is possible (see photo with former oozing spot top left at 1 metre plus), an infection and blockage of the living tissue below the secretion spot can not be excluded. Was the flux smelling acid or neutral and where any insects observed on it ?

The mushroom most probably is Mycena pura, a species decomposing litter on the forest floor, which is unrelated to the tree.

 

Right, as for smell and insects: exudate has dried to a shiny black crust all over, and has a slightly sour smell when crushed. Ants on trunk possibly feeding from it. One D shaped hole noticed next to one bleed (Buprestid beetle possibly?).

Bleeding extends high into the canopy, which as can be seen is very sparse.

Guess, which tree the little acorns came from, and which came from a healthy tree behind it: panic fruiting?

No fungi noticed other than the mycena.

Im thinking acute oak decline, and inclined to report it to the woodland manager

[Tony Croft aka hamadryad]

Crikey, I am getting a little bit worried about how many trees were losing, looks like a honey infection to me.

[RobArb]

So then, I'm going to throw the cart amongst the portions now...

 

AOD, an actual condition...

 

Or, something that already existed in another form that we've redefined, e.g. armillaria colonisation/cankers/environmental conditions..

 

A clear definition would be nice

 

Sent from Rob's GalaxySII

[RobArb]

And that was supposed to say cat amongst the pigeons!

 

Sent from Rob's GalaxySII

[Fungus]

Right, as for smell and insects: exudate has dried to a shiny black crust all over, and has a slightly sour smell when crushed. Ants on trunk possibly feeding from it. One D shaped hole noticed next to one bleed (Buprestid beetle possibly?).

Bleeding extends high into the canopy, which as can be seen is very sparse.

Guess, which tree the little acorns came from, and which came from a healthy tree behind it: panic fruiting? Im thinking acute oak decline, and inclined to report it to the woodland manager

 

Sloth,

I agree with Tony, the combination of ants feeding on it and the slightly sour smell are an indication of an Armillaria infection (rhizomorphs or plaques) of the cambium and the phloem and xylem.

And the oak producing small, partially infertile acorns, is definitely panic fruiting.

[sloth]

Ok, ta very much