The accuracy of Arbotom

I’ve been using my Arbotom tree tomograph instrument for a year now and am very impressed with its accuracy.

Lime

The first set of images below show a Lime (Tilia cordata) infected with the (primarily root and stem) decay fungus Kretschmaria deusta (Stubbdyna in Swedish).

In summer 2017 the crown looked healthy…

lind-1
Lime tree looking healthy summer 2017

… however,  a small bark discolouration on the butt raised my suspicions.

A closer visual assessment revealed those small black crusty structures typical of the mature fruit bodies of Kretschmaria deusta.

lind-2
Fruit bodies of Kretschmaria deusta on the butt

Of course the extent of any decay was unknown. The tomograph undertaken last summer indicated considerable decay:

lind-3
Tomograph of the stem base

The cross section post felling helps to show just how accurate the Arbotom is when measuring the structural integrity of stem sections.

lind-4
Cross section of the felled tree

Horse Chestnut

On the same site, a Horse Chestnut (Aesculus hipposcastanum) also saw healthy in the crown.

aesculus-1
Horse Chestnut, also looking healthy.

However, it also had a similar bark discolouration on the butt. Again I found those small black crusty structures typical of the mature fruit bodies of Kretschmaria deusta.

aesculus-2
But with small black crusty structures on the butt.

And again the Arbotom’s tomograph suggested extensive decay:

aesculus-3
Tomograph indicates decay.

… and the cross-section of the felled stem confirms the accuracy of the Arbotom.

aesculus-4
Cross section of the felled tree confirms the extent of the decay.

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