Dutch Elm Disease and ask Die Back?

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Dutch Elm Disease and ask Die Back?
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Nick

Joined: 02 Nov 2004
Posts: 34535
Location: Hereford

Posted: Sun Jun 14, 15 7:58 pm Post subject:

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: 45427
Location: Essex

Posted: Sun Jun 14, 15 8:57 pm Post subject:
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: 45427
Location: Essex

Posted: Sun Jun 14, 15 9:07 pm Post subject:
https://www.forestry.gov.uk/fr/massaria

tahir

Joined: 28 Oct 2004
Posts: 45427
Location: Essex

Posted: Sun Jun 14, 15 9:11 pm Post subject:
sooty bark disease

buzzy

Joined: 04 Jan 2011
Posts: 3708
Location: In a small wood on the edge of the Huntingdonshire Wolds

Posted: Sun Jun 14, 15 10:57 pm Post subject:
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: 15591

Posted: Mon Jun 15, 15 6:52 am Post subject:
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

Posted: Mon Jun 15, 15 8:42 am Post subject:
...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

Posted: Mon Jun 15, 15 11:34 am Post subject:

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: 6540
Location: New England (In the US of A)

Posted: Mon Jun 15, 15 12:11 pm Post subject:

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: 15425
Location: Today I are mostly being in Yorkshire.

Posted: Mon Jun 15, 15 12:20 pm Post subject:

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: 6540
Location: New England (In the US of A)

Posted: Mon Jun 15, 15 12:21 pm Post subject:
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: 45427
Location: Essex

Posted: Mon Jun 15, 15 12:25 pm Post subject:

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: 15425
Location: Today I are mostly being in Yorkshire.

Posted: Mon Jun 15, 15 12:35 pm Post subject:

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: 45487
Location: yes

Posted: Mon Jun 15, 15 12:46 pm Post subject:
just to complicate things i think there are hybrids of the acer family of trees.

Slim

Joined: 05 Mar 2006
Posts: 6540
Location: New England (In the US of A)

Posted: Mon Jun 15, 15 12:48 pm Post subject:

Hairyloon wrote:

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

Fixed that for you

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