Blood like sap running from mature birch. Appearing from black legions.
No interactions present.
Do you mean lesions? Kind regards
...there were lots of them.
How to take close-ups with cheap phone and hand-lens:
Field Guides for Budding Botanists:
Yes, 3000 - 6000 of them!
...could it be Phytophthora ramorum?
Normal Silver Birch sap should be clear - see my Observation of a felled tree for comparison.
This looks more like a diseased lesion (if that's not tautology), but I hope that it isn't anything serious...
I thought birch sap should be clear, so the possibility of a disease occured to me.
Rachy, on 24th April I am attending OPAL Tree
Health survey training where I shall raise your concern re Silver Birch sap and get back to you. Kind regards
..but I think Mike Griffiths would be the person to keep informed, as it's his observation.
Enjoy the training!
Lat/Lng: 53.36342, -3.15904
OS grid ref: SJ229857