Would anybody know this one?

[Scottie]

Was grounding out a stump of a cherry and when I finished I noticed that part of the root was blue. The last time I saw this was when I had to grind out a couple of cherries after someone was pouring diesel around the tree to kill it.

There was no obvious smell of diesel from the stump today unlke the other cherries when it was really smelly.

 

So does anybody know what the 'blue root' could have been cause by? The cherry looked dead as cherries do and I didn't come across any noticable fungi.

[Mesterh]

Staining from nails/other bits of steel?

[Matthew Arnold]

Was it underground or just poking above the surface?

[Scottie]

It was under ground about 150mm down and about a third of the root was blue.

[Matthew Arnold]

Sounds like it might be Cobalt Crust fungus (Terena caerulea). But ive only ever seen it growing above ground and on Hazel and Elm.

[Dave D]

sure it wasnt a water pipe?