Sudden ash death

[Graham]

Noticed this ash tree earlier this year looking a little thin on top. Summer came and went along with the tree. A. mellea? The ground in the Midlands seems so dry and trees obviously stressed that I wonder if next year will see many more deaths?

 

So few fungi popping their heads up around here compared to previous years.

 

 

 

 

[Matthew Arnold]

Yup. Thats definately A. mellea. The footpath and the recent trenching work to the fence in the first shot probably didnt help. The little Rowan looks like it has started to be affected by it. The fungi is panic fruiting by the looks of it too so it would be long until it starts munching into the wood in the trunk.

[Tony Croft aka hamadryad]

Yup. Thats definately A. mellea. The footpath and the recent trenching work to the fence in the first shot probably didnt help. The little Rowan looks like it has started to be affected by it. The fungi is panic fruiting by the looks of it too so it would be long until it starts munching into the wood in the trunk.

 

im with Gerrit on this one:thumbup1:

[Graham]

Certainly been no disturbance around this tree as far as I've known it...10 yrs+. The ducting you see there is from the adjacent railway station which is why the footpath's closed. The soil here is thin over glacial gravel which is why it dries very quickly.

[Matthew Arnold]

im with Gerrit on this one:thumbup1:

 

I shall take that as a compliment:thumbup:

[Tony Croft aka hamadryad]

I shall take that as a compliment:thumbup:

 

lol, avatar threw me there:blushing:

 

was a good answer bar the trenching.

[Matthew Arnold]

lol, avatar threw me there:blushing:

 

was a good answer bar the trenching.

 

How so on the trenching? With that narrow "fresher" tarmac although it is on the very very edge of the drip line, would the roots out there when they were removed by the digging caused the A.mellea to get in, thus weakening the tree slowly over the 10+ years it has been in the root system?

[RobRainford]

How so on the trenching? With that narrow "fresher" tarmac although it is on the very very edge of the drip line, would the roots out there when they were removed by the digging caused the A.mellea to get in, thus weakening the tree slowly over the 10+ years it has been in the root system?

 

Well armillaria produces enzymes that fool the tree into thinking it's a mycorrhizal fungi and then colonised that way (thanks Hama for that one!). I personally dont think the digging of the path would be such an issue for a large tree and there are other factors that attributed to this, such as the wound on the side, fungal spores could have colonised there.

 

With the older path being there already, the bulk density of the soil beneath would have been difficult for the roots to grow in, so very minor, if any, roots would have been damaged during the digging.

[Fungus]

Well Armillaria produces enzymes that fool the tree into thinking it's a mycorrhizal fungi and then colonised that way (thanks Hama for that one!).

 

Rob,

There is only one parasitic Armillaria species, of which is documented, that it mimics feromones (not enzymes) of ectomycorrhizal macrofungi, and that's a non-European, i.a. an American species.

[Tony Croft aka hamadryad]

Well armillaria produces enzymes that fool the tree into thinking it's a mycorrhizal fungi and then colonised that way (thanks Hama for that one!). I personally dont think the digging of the path would be such an issue for a large tree and there are other factors that attributed to this, such as the wound on the side, fungal spores could have colonised there.

 

With the older path being there already, the bulk density of the soil beneath would have been difficult for the roots to grow in, so very minor, if any, roots would have been damaged during the digging.

 

 

I told you also they donty ALL do that!