UKTC Archive

Re: Fungus on Lime - Ivy

Subject: Re: Fungus on Lime - Ivy
From: Jerry Ross
Date: Oct 07 2019 08:01:25
Firstly, Ivy is an introduced species to America and like so many introductions, causes problems that it doesn't cause in habitats where it has evolved with other species that have a tendency to control or at least limit its growth, or else live amicably with it. Secondly, one of the ways trees manage to live amicably with it is (for deciduous trees anyway) by limiting its capacity top grow and spread through the summer by producing dense canopies, so the ivy is happy enough climbing up the trunk, doing much of its photosynthesising (and of course its fruiting)  in the winter months. It's only when the ivy becomes more vigorous than the host tree, that is when the host is losing vigour and beginning to decline, that the ivy can become a problem by proliferating and spreading out onto the lateral branches where it can start to smother the host's foliage. (It can be more problematic on evergreens such as hollies and yew, as it has to grow straight to the outside or tops of the tree to order to seek light, with the result that it tends to suppress and smother the host tree at an earlier stage. SO... I suggest that ivy is not an cause of decline but a symptom, albeit one which may exacerbate the situation.

That's my theory anyway.



On 07/10/2019 08:28, Brewster, Ian wrote:
It's interesting to note the suggestion that Ivy reduces airflow, raises 
humidity to promote disease. Though Ivy seemed to be drier beneath their waxy 
leaf cover... Whether disease was there prior to Ivy growth would be 
difficult to determine unless both tree and Ivy growth rings can be counted 
to see which one chemically reacted/grew first  ... There seems to be a 
connection between decay and fruiting brackets and the presence of thick Ivy 
growth at the base of the thickest stem which is something I have often seen.
If Ivy promotes the cause then Perhaps thinning multiple strands to a few 
that are leafless and retaining the wildlife habitat aspect to assist with 
aerating the tree base (bit like thinning the crown of a fruit tree) may help 
reduce diseases such as these from taking hold.

Sent from my Samsung Galaxy smartphone.


-------- Original message --------
From: David Lonsdale <uktc@xxxxxx.tree-care.info>
Date: 06/10/2019 12:15 (GMT+00:00)
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: RE: Fungus on Lime

Dear All,

Coniophora puteana, a well-known cause of wet-rot in timber, can degrade the 
outer layers of the bark of various tree species if humidity is high 
(typically near ground level). The underlying inner bark remains intact and 
eventually becomes exposed by the shedding of the decaying outer bark. The 
exposed inner bark usually looks smoother than the surrounding unaffected 
outer bark; hence the name 'smooth patch' for this condition.

DL

-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info <uktc-request@xxxxxx.tree-care.info> 
On Behalf Of AV Arboriculture
Sent: 06 October 2019 11:11
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: Re: Fungus on Lime

Hi Wayne,

That is interesting - do you know of any research that has shown saprophytes 
to consume tree bark? That was one of my main concerns.

Mike

Regards,

Mike Charkow
Principal Arboriculturist
______________________
Arbor Vitae Arboriculture Ltd

Planning surveys, Tree inspections, Bats in trees inspections, Arboricultural 
consultancy, Soil de-compaction, Root Investigation, Woodland Management.

[ mailto:info@xxxxxxx.co.uk | info@xxxxxxx.co.uk ] [ 
https://avtree.co.uk/<https://avtree.co.uk/> | 
www.avtree.co.uk<http://www.avtree.co.uk> ]
07917XXXXXX
Company Registration Number: SC413171

----- Original Message -----
From: "Wayne Tyson" <wt750mv@xxxxxx.com>
To: "uktc" <uktc@xxxxxx.tree-care.info>
Sent: Saturday, 5 October, 2019 22:53:14
Subject: Re: Fungus on Lime

Ivy tends to promote and maintain a higher humidity in such micro-environments, so 
perhaps its removal might discourage fungal development. Closer examination might 
reveal useful particulars. Sometimes saprophytes consume the bark, setting up 
conditions for entry into the heartwood, as well as set up conditions for parasitic 
species. Even loss of heartwood weakens the tree, which can appear to the casual 
observer to be "perfectly healthy."

I am speaking from experience in the USA only. Even in the relatively dry climate in 
which I live now, I have observed such phenomena in association with ivy. Some species 
appear to be more tolerant than others. In susceptible species, failure is often the 
result, even of those "perfectly healthy" ones. Any tree professional should 
perform all of the necessary investigations to secure as complete as possible analysis. 
(No offence to my UK listserv pals, but failure to follow those procedures seems to be 
more common than not here in the USA.)

Wayne

On Sat, Oct 5, 2019 at 1:34 PM Rupert Baker <rupert_baker@xxxxxxxx.co.uk>
wrote:

This looks like a fungus I've seen in humid situations at the base of
various species trees; if it is the same thing it is a harmless
saprophyte. Mind you, that is no the basis of a low-res photo...
Atb
Rupert
-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info On Behalf Of AV Arboriculture
Sent: 05 October 2019 13:09
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: Fungus on Lime

I think this is some form of dry rot - do you agree? It was growing on
two Lime trees under ivy. I didn't find any bark necrosis, though one
tree has a small amount of sapwood delignification (possibly
unrelated). Does anyone know the effects of this on trees?

Mike Charkow



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To unsubscribe send mailto:uktc-unsubscribe@xxxxxx.tree-care.info

The UKTC is supported by Bosky Trees arboricultural consultancy
http://www.boskytrees.co.uk/<http://www.boskytrees.co.uk/>
It's interesting to note the suggestion that Ivy reduces airflow, raises 
humidity to promote disease. Though Ivy seemed to be drier beneath their waxy 
leaf cover... Whether disease was there prior to Ivy growth would be 
difficult to determine unless both tree and Ivy growth rings can be counted 
to see which one chemically reacted/grew first  ... There seems to be a 
connection between decay and fruiting brackets and the presence of thick Ivy 
growth at the base of the thickest stem which is something I have often seen.
If Ivy promotes the cause then Perhaps thinning multiple strands to a few 
that are leafless and retaining the wildlife habitat aspect to assist with 
aerating the tree base (bit like thinning the crown of a fruit tree) may help 
reduce diseases such as these from taking hold.

Sent from my Samsung Galaxy smartphone.


-------- Original message --------
From: David Lonsdale <uktc@xxxxxx.tree-care.info>
Date: 06/10/2019 12:15 (GMT+00:00)
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: RE: Fungus on Lime

Dear All,

Coniophora puteana, a well-known cause of wet-rot in timber, can degrade the 
outer layers of the bark of various tree species if humidity is high 
(typically near ground level). The underlying inner bark remains intact and 
eventually becomes exposed by the shedding of the decaying outer bark. The 
exposed inner bark usually looks smoother than the surrounding unaffected 
outer bark; hence the name 'smooth patch' for this condition.

DL

-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info <uktc-request@xxxxxx.tree-care.info> 
On Behalf Of AV Arboriculture
Sent: 06 October 2019 11:11
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: Re: Fungus on Lime

Hi Wayne,

That is interesting - do you know of any research that has shown saprophytes 
to consume tree bark? That was one of my main concerns.

Mike

Regards,

Mike Charkow
Principal Arboriculturist
______________________
Arbor Vitae Arboriculture Ltd

Planning surveys, Tree inspections, Bats in trees inspections, Arboricultural 
consultancy, Soil de-compaction, Root Investigation, Woodland Management.

[ mailto:info@xxxxxxx.co.uk | info@xxxxxxx.co.uk ] [ 
https://avtree.co.uk/<https://avtree.co.uk/> | 
www.avtree.co.uk<http://www.avtree.co.uk> ]
07917XXXXXX
Company Registration Number: SC413171

----- Original Message -----
From: "Wayne Tyson" <wt750mv@xxxxxx.com>
To: "uktc" <uktc@xxxxxx.tree-care.info>
Sent: Saturday, 5 October, 2019 22:53:14
Subject: Re: Fungus on Lime

Ivy tends to promote and maintain a higher humidity in such micro-environments, so 
perhaps its removal might discourage fungal development. Closer examination might 
reveal useful particulars. Sometimes saprophytes consume the bark, setting up 
conditions for entry into the heartwood, as well as set up conditions for parasitic 
species. Even loss of heartwood weakens the tree, which can appear to the casual 
observer to be "perfectly healthy."

I am speaking from experience in the USA only. Even in the relatively dry climate in 
which I live now, I have observed such phenomena in association with ivy. Some species 
appear to be more tolerant than others. In susceptible species, failure is often the 
result, even of those "perfectly healthy" ones. Any tree professional should 
perform all of the necessary investigations to secure as complete as possible analysis. 
(No offence to my UK listserv pals, but failure to follow those procedures seems to be 
more common than not here in the USA.)

Wayne

On Sat, Oct 5, 2019 at 1:34 PM Rupert Baker <rupert_baker@xxxxxxxx.co.uk>
wrote:

This looks like a fungus I've seen in humid situations at the base of
various species trees; if it is the same thing it is a harmless
saprophyte. Mind you, that is no the basis of a low-res photo...
Atb
Rupert
-----Original Message-----
From: uktc-request@xxxxxx.tree-care.info On Behalf Of AV Arboriculture
Sent: 05 October 2019 13:09
To: UK Tree Care <uktc@xxxxxx.tree-care.info>
Subject: Fungus on Lime

I think this is some form of dry rot - do you agree? It was growing on
two Lime trees under ivy. I didn't find any bark necrosis, though one
tree has a small amount of sapwood delignification (possibly
unrelated). Does anyone know the effects of this on trees?

Mike Charkow



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The UK Tree Care mailing list
To unsubscribe send mailto:uktc-unsubscribe@xxxxxx.tree-care.info

The UKTC is supported by Bosky Trees arboricultural consultancy
http://www.boskytrees.co.uk/<http://www.boskytrees.co.uk/>




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To unsubscribe send mailto:uktc-unsubscribe@xxxxxx.tree-care.info

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http://www.boskytrees.co.uk/<http://www.boskytrees.co.uk/>



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To unsubscribe send mailto:uktc-unsubscribe@xxxxxx.tree-care.info

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http://www.boskytrees.co.uk/<http://www.boskytrees.co.uk/>




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To unsubscribe send mailto:uktc-unsubscribe@xxxxxx.tree-care.info

The UKTC is supported by Bosky Trees arboricultural consultancy 
http://www.boskytrees.co.uk/<http://www.boskytrees.co.uk/>




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To unsubscribe send mailto:uktc-unsubscribe@xxxxxx.tree-care.info

The UKTC is supported by Bosky Trees arboricultural consultancy
http://www.boskytrees.co.uk/<http://www.boskytrees.co.uk/>
NPS





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