What fungi did this?

[MATTMOSS]

Had to get this Whitebeam cleared up today, on closer inspection the roots had a white mycilium rotten look to them. It wasnt ther best tree but i hadnt noticed any fruiting bodies previously(not to say there wasnt any) I just wonderd what you rekon would have caused this (ROT) i would guess at Ganoderma sp? what do you think from the pics?

[RobRainford]

If ganoderma was the culprit I believe you would have seen a failure at the base of the stem and not roots. As well as fruiting bodies.

 

Culprit for this could have been merip due to root rot, can't remember 100% if sorbus is a host for merip.

[Treecreeper1961]

I don't know but it's a good bit of photography. I saw a large ash root plate from a distance that looked similar ish. There was a county council officer there so I didn't stop and get the camera out.

 

How about Kretzmaria deusta? It;'s my favourite.

[David Humphries]

I would guess even without seeing any of the associated fruitbodies or rhizomorphs, that this decay may be synonymous with the strategy of Armillaria sp.

 

 

 

 

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[Fungus]

Culprit for this could have been merip due to root rot, can't remember 100% if sorbus is a host for merip.

 

Rob,

Yes, in The Netherlands it is.

[RobRainford]

Thanks Gerrit, good to have that cleared up for myself.

[Baxter]

I would guess even without seeing any of the associated fruitbodies or rhizomorphs, that this decay is synonymous with the strategy of Armillaria sp.

 

 

 

 

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How are you so confident about this David? The fact of a whitebeam failing from the rootplate?

[David Humphries]

How are you so confident about this David? The fact of a whitebeam failing from the rootplate?

 

I wouldn't say I am entirely confident, merely offering up a possible agent.

 

Armillaria (from experience) often degrades (white rot) the roots of it's host (Butin/Lonsdale/Webber-Mattheck)

 

 

 

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