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: AV Arboriculture
Date: Dec 06 2019 13:07:46
Hi Dave,

A VTA1 (Mattheck & Breloer) is a ground-based visual inspection of all parts 
of the tree, looking at physiological and biomechanical aspects.  A climbing 
inspection may be recommended as a follow up to inspect suspected defects 
that cannot be assessed from the ground.  It has limitations, but it would be 
unreasonable and disproportionate to do a climbing inspection of every tree.  
A VTA1 will usually (though perhaps not always) be able to identify suspected 
aerial defects.

A defect at the base of the tree (such as a virulent pathogenic fungus) would 
be more likely to cause more serious harm, for instance if the defect led to 
whole tree failure.  An aerial defect may lead to a branch failure, which in 
most cases would not be as serious.

I believe that the VTA system is a proportionate and reasonable inspection 
strategy.

It is usually possible to inspect hedgerow trees, if you don't mind a few 
scratches.  In most cases hedgerows will not present as much risk as solitary 
trees.  Of course you have to judge each solitary/hedgerow tree on its own 
merits and if there is a high target then some basal clearance may be 
necessary so as to be able to fully inspect the lower stem.  

Regards, 

Mike 


----- Original Message -----
From: "David Evans" <david@xxxxxxxxxxxxxx.com>
To: "uktc" <uktc@xxxxxx.tree-care.info>
Sent: Wednesday, 4 December, 2019 20:24:32
Subject: RE: How does one inspect big hairy common limes, allowed to grow a 
secondary forest of basal sprouts?

Hi Mark

Sorry, I've just found this in my drafts folder, and forgot to send it.

<<I state at the outset that I would be performing a VTA1>>

Great. Can you explain to me what a VTA1 is?  Absence an obvious defect as a 
trigger to look closer, what is it you're doing during a VTA1 that means you 
don't have to climb trees to see the tops of branches but you do have to 
remove epicormics to you can see the base of trees?

What do you do about hedgerow trees?  Do you insist that enough of the hedge 
is removed so you can assess all around the base of those trees, like you're 
doing with epicormics on Limes?

Cheers

Acer Ventura




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