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Dutch Elm Disease and ask Die Back?
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Post new topic   Reply to topic    Downsizer Forum Index -> Conservation and Environment
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Nick



Joined: 02 Nov 2004
Posts: 34027
Location: Hereford
PostPosted: Sun Jun 14, 15 7:58 pm    Post subject:  Reply with quote    

Hairyloon wrote:
Nick wrote:
But the tree was thirty years smaller.

But it will have grown with the water supply/drainage that the drive provides.
What has changed?


Ah, ok. I know nothing, was just idly suggesting.

tahir



Joined: 28 Oct 2004
Posts: 44278
Location: Essex
PostPosted: Sun Jun 14, 15 8:57 pm    Post subject: Reply with quote    

Massaria?

There's lots oif new pests cane disease on their way, I believe massaria affects london plane and sycamore, prolly worth talking to a local tree bod

tahir



Joined: 28 Oct 2004
Posts: 44278
Location: Essex
PostPosted: Sun Jun 14, 15 9:07 pm    Post subject: Reply with quote    

http://www.forestry.gov.uk/fr/massaria

tahir



Joined: 28 Oct 2004
Posts: 44278
Location: Essex
PostPosted: Sun Jun 14, 15 9:11 pm    Post subject: Reply with quote    

sooty bark disease

buzzy



Joined: 04 Jan 2011
Posts: 3546
Location: In a small wood on the edge of the Huntingdonshire Wolds
PostPosted: Sun Jun 14, 15 10:57 pm    Post subject: Reply with quote    

Perhaps some militant conservationists, many of whom regard Sycamores as "Satan's Dandruff", have made a night raid and poured a few pints of weed killer round the tree.

Henry

Mistress Rose



Joined: 21 Jul 2011
Posts: 10888

PostPosted: Mon Jun 15, 15 6:52 am    Post subject: Reply with quote    

I didn't realise those diseases had arrived; thought they were still in the offing. I heard a talk by Dr. Webber a year or so ago and spoke to her afterwards, and she is very knowledgeable.

The fact the top of the tree is affected but the bottom looks all right in the picture probably means you will have to have a good look with binoculars for anything odd.

Falstaff



Joined: 27 May 2009
Posts: 1014

PostPosted: Mon Jun 15, 15 8:42 am    Post subject: Reply with quote    

...Or get a ladder -

No mushrooms growing out of the trunk, or from buried roots at any time ?

Honey fungus kills trees - but I don't know the symptoms.

Seems there is quite a lot of stuff that attacks "Satan's dandruff" which I didn't know about.

LynneA



Joined: 25 Oct 2006
Posts: 4893
Location: London N21
PostPosted: Mon Jun 15, 15 11:34 am    Post subject: Reply with quote    

From the RHS website:

Plane anthracnose/RHS Gardening
American sycamore ( Platanus occidentalis ) is most susceptible to the disease, whereas oriental plane ( P. orientalis ) is quite resistant...Young leaves and shoots may die back in spring, making the tree look as though it has suffered from frost damage (this is known as ?shoot blight...

The leaves exude a sap, which can attract aphids, and they can bring in disease too.

Slim



Joined: 05 Mar 2006
Posts: 5376
Location: New England (In the US of A)
PostPosted: Mon Jun 15, 15 12:11 pm    Post subject: Reply with quote    

Ok, are we talking about a Platanus occidentalis like I would be familiar with? Your photo didn't quite look like one. Over here it's quite common for P. occidentalis to take on a good bit of anthracnose damage in the spring, and look like a dead tree, but then it leafs out again around this time and does just fine. The disease is worse some years than others, but doesn't usually do any real damage. It also doesn't affect just the top half of a tree. (also, if yours is a P. occidentalis, it's just a young'n still. They can get MUCH bigger: https://en.wikipedia.org/wiki/Buttonball_Tree )


Seeing as only a portion of your tree is affected, I would think that something is affecting the vasculature. It looks like you've ruled out root damage, which is suspect #1. Suspect #2 in my book is some disease or pest in the actual vasculature itself. That would be an unfortunate diagnosis.....

Hairyloon



Joined: 20 Nov 2008
Posts: 15264
Location: Today I are mostly being in Yorkshire.
PostPosted: Mon Jun 15, 15 12:20 pm    Post subject: Reply with quote    

Falstaff wrote:
Honey fungus kills trees - but I don't know the symptoms.

As I understand, there are many types of honey fungus and they are mostly secondary pathogens: very unlikely to attack a healthy tree.
Post mortem symptoms are bootlaces under the bark.

Slim



Joined: 05 Mar 2006
Posts: 5376
Location: New England (In the US of A)
PostPosted: Mon Jun 15, 15 12:21 pm    Post subject: Reply with quote    

Okay, so I've just clicked through your photo of the healthy bit, and zoomed in.... that's not a sycamore at all, that's a maple

Correct me if I'm wrong, but those sure look like Acer samaras

Is the U.K. suffering from the same not totally known syndrome that we are experiencing in some places over here called, for lack of a better name, "maple decline"?

tahir



Joined: 28 Oct 2004
Posts: 44278
Location: Essex
PostPosted: Mon Jun 15, 15 12:25 pm    Post subject: Reply with quote    

Slim wrote:
Is the U.K. suffering from the same not totally known syndrome that we are experiencing in some places over here called, for lack of a better name, "maple decline"?


Not as far as I know

Hairyloon



Joined: 20 Nov 2008
Posts: 15264
Location: Today I are mostly being in Yorkshire.
PostPosted: Mon Jun 15, 15 12:35 pm    Post subject: Reply with quote    

Slim wrote:
Okay, so I've just clicked through your photo of the healthy bit, and zoomed in.... that's not a sycamore at all, that's a maple

In English, sycamore is a species of maple, usually Acer pseudoplatanus...

dpack



Joined: 02 Jul 2005
Posts: 35510
Location: yes
PostPosted: Mon Jun 15, 15 12:46 pm    Post subject: Reply with quote    

just to complicate things i think there are hybrids of the acer family of trees.

Slim



Joined: 05 Mar 2006
Posts: 5376
Location: New England (In the US of A)
PostPosted: Mon Jun 15, 15 12:48 pm    Post subject: Reply with quote    

Hairyloon wrote:

In England, sycamore is a species of maple...


Fixed that for you

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