Can any one help with ident of these Bleeding cankers

[David Humphries]

was that white stuff slippery and stinky? fibrous and firm?

evidence of rhizomorphs- visual, or circumstantial? And where was this evidence, how far away?

Circular chisel--powered by motor? Inscrutable xylem penetration. tisky tisky.

I used a chisel powered by compressor at Biomechanics Week on sgr's. It has some advantages I suppose but if manual techniques work well why change, says this closet Luddite.

That sampling location and size is same as requested by labs in US.

 

 

White 'stuff' (the mycelium of Armillaria) was mushroomy in odour & spongy

 

Tree was removed.........eventually, Guy.

 

Chisel is the circular one used to take the bark out for arborsonic sensors

 

Rhizomorphs at base of the tree, but no shots, so they weren't ever there

 

 

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[treeseer]

"White 'stuff' (the mycelium of Armillaria) was mushroomy in odour & spongy

 

How does one tell that mycelium then from other organisms that have similar signs of white spongy mushroomy stuff? Reminds me of the rhizomorphs; oft times i run into dead black roots with odd branching rectilinear and tend to jump to questionable conclusions. I may need a higher power hand lens.

 

"Chisel is the circular one used to take the bark out for arborsonic sensors

 

Arborsonic, the tomo from hungary? They did not use such a chisel 2 years ago. Most tomo sensors attach by nails, which do not yield perfect results, but that chisel damage looks significant. That's the curse of quality photography; if your pics were crappy like mine the damage would not look as bad!

[daltontrees]

My post doesn't imply that I would rule out Phytophthora, but through our own field studies the visual symptoms shown above could fall within the parameters of an Armillaria infection.

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Didn't mean to criticise, just enjoying the speculation and debate, it is how one learns best. Your opinion is singularly the most reliable and rigorous on Arbtalk. But if the OP ever confirms it is an Alnus my money's still on P.alni. based on my own experiences and these few photos.

[Gary Prentice]

I wonder if phytophthora is just more prevalent here in the north, making it the first likely suspect.

 

Just an idea btw