Mike Griffiths's picture

Birch sap

Observed: 6th April 2013 By: Mike GriffithsMike Griffiths’s reputation in PlantsMike Griffiths’s reputation in Plants
birch sap
Description:

Blood like sap running from mature birch. Appearing from black legions.

Identifications
  • Sap from birch tree
    Confidence: It might be this.
Species interactions

No interactions present.

Comments

Beagle's picture

Pathology - wounds

Do you mean lesions? Kind regards

Hugh

Mike Griffiths's picture

Yes

Yes

Rachy Ramone's picture

No:-

...there were lots of them.

Rachy Ramone

How to take close-ups with cheap phone and hand-lens:
http://tree-and-shrub-id.blogspot.co.uk/p/how-to-close-ups.html
Field Guides for Budding Botanists:
http://www.amazon.co.uk/-/e/B01A8YB0WY

Beagle's picture

A Botanist with a sense of humour!

Yes, 3000 - 6000 of them!

Hugh

Rachy Ramone's picture

lol! But seriously...

...could it be Phytophthora ramorum?

Normal Silver Birch sap should be clear - see my Observation of a felled tree for comparison.

http://www.ispot.org.uk/node/320353

This looks more like a diseased lesion (if that's not tautology), but I hope that it isn't anything serious...

Rachy Ramone

How to take close-ups with cheap phone and hand-lens:
http://tree-and-shrub-id.blogspot.co.uk/p/how-to-close-ups.html
Field Guides for Budding Botanists:
http://www.amazon.co.uk/-/e/B01A8YB0WY

Mike Griffiths's picture

I thought birch sap should be

I thought birch sap should be clear, so the possibility of a disease occured to me.

Beagle's picture

Tree Health

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

Hugh

Rachy Ramone's picture

Thanks, Hugh,

..but I think Mike Griffiths would be the person to keep informed, as it's his observation.

Enjoy the training!

Rachy Ramone

How to take close-ups with cheap phone and hand-lens:
http://tree-and-shrub-id.blogspot.co.uk/p/how-to-close-ups.html
Field Guides for Budding Botanists:
http://www.amazon.co.uk/-/e/B01A8YB0WY