Chalara fraxinea - Generic thread

[Toad]

We have a number of trees in various states of decline around home, many close together and of a similar size but at different stages of being buggered. Most are of little danger being in fields away from the public, but will start to damage other healthy trees of different species around them and put livestock at risk if they fail in an uncontrolled manner so I'm thinking it is going to be worth felling them at the point they are beyond hope but before they become too dangerous and unpredictable, but at what point is this? Is there a percentage of crown loss that is generally regarded as being a sign that it is irrecoverable?

[Stev0]

Interested in this thread as a new owner of a small woodland with a number of ash that look ok to my untrained eye. Plus one large ash in our back garden that only this year is looking distinctly leaf-deprived on one side compared to previous years. 

Pic of it in 2020, and another taken this year. 

I can see no lesions, no leaf die back or discolouration, and the inside of any small dead branches that fall are a clean, balsa-like colour with no blackening. 

 

[Stubby]

On 14/07/2021 at 11:55, Stev0 said:

Interested in this thread as a new owner of a small woodland with a number of ash that look ok to my untrained eye. Plus one large ash in our back garden that only this year is looking distinctly leaf-deprived on one side compared to previous years. 

Pic of it in 2020, and another taken this year. 

I can see no lesions, no leaf die back or discolouration, and the inside of any small dead branches that fall are a clean, balsa-like colour with no blackening. 

 

That is how they go .

[Stubby]

On 26/08/2020 at 21:02, Toad said:

We have a number of trees in various states of decline around home, many close together and of a similar size but at different stages of being buggered. Most are of little danger being in fields away from the public, but will start to damage other healthy trees of different species around them and put livestock at risk if they fail in an uncontrolled manner so I'm thinking it is going to be worth felling them at the point they are beyond hope but before they become too dangerous and unpredictable, but at what point is this? Is there a percentage of crown loss that is generally regarded as being a sign that it is irrecoverable?

If you are going to fell them do it before they become too brittle . Try and avoid having to bang wedges in as this can cause dead limbs to fall , on you .

[Woodworks]

Bacteria to save the day? 

Physiological and genomic characterisation of Luteimonas fraxinea sp. nov., a bacterial species associated with trees tolerant to ash dieback - ScienceDirect

WWW.SCIENCEDIRECT.COM

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A group of isolates of the genus Luteimonas was characterised, which represented a specific component of the healthy core microbiome of Fraxinus excel…

 

[Stubby]

I have been monitoring a row of 15 ash trees near me , on the river bank . There were , over the last 3 years some of them ( probably 3 or 4 ) that showed obvious signs  of Chalara .  The trees either side showed no problems . This year however the few that looked infected now look to be healthy and in full leaf . There is the odd dead stick but nothing like previously . Do you think these trees are " shrugging " it off and recovering ? It certainly looks that way .  

[maybelateron]

I have an Ash that we planted 23 years ago, it was from a nursery ie ? imported. In recent years the top half of the crown has died back in keeping with adb. As it is not a hazard where it is we have left it to observe the progress. Whilst the top half is clearly dead the bottom half is flourishing, so we will continue to observe. A couple of slightly younger Ash, self set in our hedges have been doing well, and they are in close proximity to the poorly one. Interesting to see how things go.