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06/11/2012 at 19:30



Could anybody tell me what problem on this birch tree? Thanks. Chris



06/11/2012 at 22:50

The black mass on the tree in the lower picture looks like canker. I think cankers are due to a fungal infection and they have to be cut out and disinfected, but it's not something I've ever done. I hope someone more expert than me answers.

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