Decay images

[David Humphries]

Whilst looking at something else today, we put the resistograph in to an oak which had Laetiporus.

 

To see how accurate it could pick up on the brown rot decay.

 

Spot on.

 

 

 

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[Tony Croft aka hamadryad]

why the peak then trough then peak again David?

[David Humphries]

why the peak then trough then peak again David?

 

Read across from right to left on the chart, it shows; 1.5cm of bark, then 16cm of sound wood (peak), then 11cm of brown rot (trough) then 5cm of sound (peak) then the remaining 8cm of the 400mm drill as fresh air (trough) where you can see the needle has come clean through (in the last shot)

 

 

 

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[Tony Croft aka hamadryad]

Read across from right to left on the chart, it shows; 1.5cm of bark, then 16cm of sound wood (peak), then 11cm of brown rot (trough) then 5cm of sound (peak) then the remaining 8cm of the 400mm drill as fresh air (trough) where you can see the needle has come clean through (in the last shot)

 

 

 

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argh yes, I see the needle now, makes much more sense!

[RobArb]

Ash fell from just now, 50% deadwood in crown, starting to show first signs of bottle butt too, no before pics sorry

 

 

 

Sent from my Galaxy S2

[sloth]

That's the prettiest decay pattern I've seen in a while any ideas on the causal fungi?

[RobArb]

Unfortunately not no, was hoping someone on here might have an idea?

 

was thinking some sort of hispidus canker but probably well off the mark

 

Sent from my Galaxy S2

[David Humphries]

I would think that location in trunk and host would throw Perenniporia fraxinea up, as a potential in this case.

 

How far up the trunk did the discolouration extend Rob?

 

 

 

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[RobArb]

About 2', 3'at the most

 

Sent from my Galaxy S2

[David Humphries]

For comparison, here's a cross section from an ash we felled 5 years ago, heavily colonised & girdled by the fruit bodies of Perenniporia fraxinea.

 

This too, only extended a 2/3 feet up the trunk.

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