Chalara fraxinea - Generic thread

[Stere]

Ash mostly isn't in leaf yet so hard to say whats happening this year so far.

[openspaceman]

On 08/05/2020 at 08:08, Woodworks said:

What do the experts on here make of this slightly encouraging story?

 

Certain landscapes show resistance to ash dieback

WWW.BBC.CO.UK

---

Some habitats can help dampen the spread of ash dieback, which threatens ash trees.

 

"In particular, we identify that under a certain ash density, the disease will remain mild."

 

This fits in with my observations, the ash woodland I did some volunteering in has been devastated as have the self seeded ash in my mate's paddock as it re wilds, yet I have an ash in the garden, presumably brought in as seed with logs, which is 3 seasons old now and showing no signs. This village is on a light sandy soil and very few ash locally.

 

It would seem that individual trees may stave off (and compartmentalise?) a single spore entry through a leaf but become overwhelmed with multiple infections, much like the current viral load concerns.

[PeteB]

I drove from top of Leicestershire down to Cardiff via the Ross spur and back home via the GreenMech factory. ADB seems to be affecting vast amount of stock! Loads of DED spotted and a large number of distressed, leafless Silver Birch too. Have they got an issue too?

[Paul Cleaver]

Ive seen a lot of Die back on 40 -60 yr old trees in the council district I am surveying (Telford) my recommendations so far are "monitor" I hope they pull through

[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

---

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 .