Ash dieback diagnosis

[Jon Heuch]

9 hours ago, Stere said:

Think its quite easy to spot once you know the signs    all the say 80% plus of ash trees  with dead tops weren't around before adb.

 

Ash as a species  always  looked in very good health generally before adb with near zero dead twigs.

You might want to read Oxford Forestry Institute Occasional Paper 24 from 1983 (google, it is freely available online). Titled Ash dieback survey. Not the same disease but its abstract reads "Ash dieback was prevalent throughout the area, the
incidence of the disease being highest in Northamptonshire and adjacent areas in neighbouring counties, where the occurrence of dieback on ash trees over 25 ft in height was frequently over 40%." Whilst some time ago, things have been ash hasn't always looked in good health.

[Stere]

Interesting,   did they find out what was causing the 1980 ash dieback - says there was a a further study & im guessing they they recovered in the yrs after?

 

ResearchGate

WWW.RESEARCHGATE.NET

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ResearchGate is a network dedicated to science and research. Connect, collaborate and discover scientific publications...

 

Quote

Ash dieback, as we now understand it, was something of an

enigma for longer than usually associated with outbreaks of

destructive plant diseases. A problem in determining that some-

thing unusual was happening was that ash frequently suffered

bouts of dieback: for example,fluctuations in the water table as a

result of climatic variations were probably responsible for a period

of severe ash dieback in the UK during the 1980s.

 

So was it drought related?

 

Had both very extreme wet and dry  summers recently will be be stressing trees making adb from Chalara worse.....?

 

A chance of some recovery if climate improves?

[JaySmith]

The Tree Council also publish a decent guide

https://treecouncil.org.uk/wp-content/uploads/2020/06/Tree-Council-Ash-dieback-tree-owners-guide-FINAL.pdf

[Paul in the woods]

The was a piece in the Small Woods magazine a while back about non-Hymenoscyphus fraxineus ash dieback.

 

I was referring to the fact ash doesn't always look good, especially where it has been planted in the wrong place or where it's growing at the extremes of it's range.

 

I would be surprised if the trees in the OPs post didn't have Hymenoscyphus fraxineus but whether it's the main cause of their state is not easy to say.

 

Each year I've found our ash trees to behave a bit differently, last year many of the badly affected trees seemed to recover to some extent late on in the year but this year there's quite a few that have looked very poorly and some have now died. Thankfully a few look unaffected.

[Stere]

The link in that tree council pdf  is very good as details the other ash diseases along side adb and has good quality pics

 

https://www.observatree.org.uk/wp-content/uploads/2018/01/15_0043_-One-off-literature-Observatree-Pest-Disease-Field-Guides-Chalara_wip16.pdf

 

Alot of ash trees have  canker on the coast

 

 

 

That alert a tree map  sure its everywhere in all squares just not being reported yet?

 

 

Some more on non-Hymenoscyphus fraxineus ash dieback plus management..

 

LETTER: Chalara not curable, but certainly avoidable

WWW.FORESTRYJOURNAL.CO.UK

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"It seems to have become common practice to conflate ash dieback and Chalara ash disease."

 

Edited October 9, 2021 by Stere

[Paul in the woods]

15 minutes ago, Stere said:

The link in that tree council pdf  is very good as details the other ash diseases along side adb and has good quality pics

 

https://www.observatree.org.uk/wp-content/uploads/2018/01/15_0043_-One-off-literature-Observatree-Pest-Disease-Field-Guides-Chalara_wip16.pdf

 

That's probably the best set of pictures I've seen. Worth downloading a copy as these documents have a habbit of moving about!

 

Looks like some of the trees around here also have Phytophthora syringae which I didn't know about. 

Edited October 9, 2021 by Paul in the woods

[Khriss]

Always found Ash to be a tender tree over the years, vigorous but susceptible, climate change wont help it any. Could end up like Elm in UK. K

[kevinjohnsonmbe]

2 hours ago, Khriss said:

Always found Ash to be a tender tree over the years, vigorous but susceptible, climate change wont help it any. Could end up like Elm in UK. K

Don’t like shade, don’t like direct sunlight, don’t like drought, don’t like waterlogging... (bit like myself really)

 

Bit of a bleak out look unless measured in 100s rather than 10s of years 😂

Edited October 9, 2021 by kevinjohnsonmbe

[Khriss]

2 hours ago, kevinjohnsonmbe said:

Don’t like shade, don’t like direct sunlight, don’t like drought, don’t like waterlogging... (bit like myself really)

 

Bit of a bleak out look unless measured in 100s rather than 10s of years 😂

I take the long view, but keep planting it, resistance to H. f will build up, Elms have survived  , plus we are way cleverer now in analysis and sequencing. Ash wont become extinct. K

[Rough Hewn]

I take the long view, but keep planting it, resistance to H. f will build up, Elms have survived  , plus we are way cleverer now in analysis and sequencing. Ash wont become extinct. K

Ash is in lockdown.
Can’t move,buy or sell ash as a living tree.
I was going to plant a load at a clients.
Might have to start collecting keys.
[emoji106]