UKTC Archive

Re: How does one inspect big hairy common limes, allowed to grow a secondary forest of basal sprouts?

Subject: Re: How does one inspect big hairy common limes, allowed to grow a secondary forest of basal sprouts?
From: Bill Anderson
Date: Oct 29 2019 18:37:29
If the tree might have had some of the symptoms of decline removed, as it
seems might have been the situation in the Cavanagh/Witley case, then
potentially that's a reason for removing the feathers. But should we be
removing parts of the tree, that might have biodiversity benefits, just on
the off-chance?

On Tue, 29 Oct 2019 at 11:59, AV Arboriculture <mike@xxxxxxx.co.uk> wrote:

David,

It is fair that you have pointed out the lack of clarity in some of my
language, and your clarifications are in line with my intended meanings.

I do not concur with your approach that the tree has to have an obvious
defect such as dieback in order to have a closer look at the lower stem and
base of the tree.  I'm sure most people on here will concur that a tree can
have a serious structural defect and show no physiological symptoms.
Similarly, a tree can have an infection of Ganoderma sp. or Kretzschmaria
deusta and still show no physiological symptoms in the crown.

I'm sure you know this; I can't understand why you wouldn't want to make
sure that a tree has no defects that would make it an intolerable risk?
Could you honestly declare a stand of Limes with epicormics growth to be of
tolerable risk, just going by a visual inspection above epicormic level?
Could you then defend yourself in court when one of these trees fails and
kills someone, due to the presence of a critical defect that would have
been spotted had the epicormics been removed?

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 ]
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----- Original Message -----
From: "David Evans"
To: "uktc" <uktc@xxxxxx.tree-care.info>
Sent: Tuesday, 29 October, 2019 10:12:24
Subject: RE: How does one inspect big hairy common limes, allowed to grow
a secondary forest of basal sprouts?

Hi Mike

<epicormics, ivy or whatever).>>

I'd strongly suggest never using the S word no matter how thoroughly a
tree is inspected.  Safe, to most people, means the complete absence of
risk.  You can't make a tree safe.  What a duty holder should be looking to
do is manage the risk to a tolerable or acceptable level.  Not minimise or
reduce the risk.  If a tree fails and kills someone clearly it wasn't
safe.  It could be a tolerable or acceptable risk though.

<>

What's inspected properly?

I'm guessing you're okay with inspecting trees and assessing the level of
risk without climbing each one and checking the upper side of all the
branches you can't see?  Or not entering every garden that's necessary to
see a tree from all angles.  Or without carrying out sonic tomography and
running it through some software like TreeCalc on each tree to see whether
there's significant strength loss from decay?  Or without carrying out a
Static Load test on each tree in case the roots are decayed?  The same
principle applies to ivy, climbers, bramble, rhododendron, epicormics, very
steep slopes etc.

If you look at the issue through the spectrum of risk, because we know the
overall level of risk is extremely low (our base rate, on which
proportionality is founded), you should only be looking closer if there was
an obvious defect, like dieback, to trigger the extra effort and cost.  As
an assessor, you simply note the limitations of the assessment.

Cheers

Acer Ventura


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