Any ideas what has caused this?

[bjam1964]

Hi folks, spotted this Chestnut butt earlier today. Not sure what has happened here?

 

My guess is either a graft problem (on a Chestnut?) or something has been tied around it at some stage (unlikely due to its situation).

 

Your thoughts would be appreciated.

[Tony Croft aka hamadryad]

A graft line most likely

[Tony Croft aka hamadryad]

what about barb wire? i have seen this on lots of trees close to boundaries, not as large as this though

 

No, its too uniform in its characteristics, observe the "flow" from root growth to that of the stem connections.

[AA Teccie (Paul)]

A graft line most likely

 

Resembles the graft lines I've observed several times on Silver Lime but on H. chestnut?....A. carnea?

 

Thanks..

Paul

[Tony Croft aka hamadryad]

who knows, doesnt look boundary to me though, cattle guards would produce more lines at other levels, and if its barbed wire why not just 1/3rd of the circumference?

[bjam1964]

Resembles the graft lines I've observed several times on Silver Lime but on H. chestnut?....A. carnea?

 

Thanks..

Paul

 

That's what I thought - a graft on H Chestnut - why?

 

The bulge is 360 degrees so probably not wire.

[Tony Croft aka hamadryad]

That's what I thought - a graft on H Chestnut - why?

 

The bulge is 360 degrees so probably not wire.

 

O.K, this is now one for the nursery men, so what species of Aesculus are grafts?

 

I bet theres a whole heap!

[ScottF]

The rootstock would generally be more vigorous than the "graftee", therefore be thicker (think of all those top-worked Kanzan Cherries with a bulging root and a weedy head).

 

Could this be butt-rot causing the stem to "slump" and the increment resulting from adaptive growth?

 

 

Dunno.

[elicokiz]

I would always assume maybe incorrectly, that similar deformation is caused by graft incompatability. We have an Acer on campus which has done a similar thing but have always assumed it was reaction wood brought about by Shell buckling? check out C. Mattheck (The face of failure) on page 124.just thinking laterally?

Dave

[Rob Murison]

It looks rather like a graft union where the root stock is more dominant than the scion material.. there are some great examples at Kew of this, both the dominant root stock and also over vigorous scion material which creates a very interesting form indeed!