Dark exudate from Oak

[welwell]

Like the title says, looked at an oak last week, beaut of a tree, but as I walked away i noticed a slight drop in vigour of the crown on one side (I mean really slight) few small bits of dead and it had dropped a branch from this same sides in the high winds (could be coincidence) then I noticed this on the limb that the side with the less vigour grew from (hope that makes some sort of sense)

 

Any ideas/ theories?

[Stubby]

Coming from the old wound that has not fully " dough nutted " over ? A bleeding canker may be ?

[Ross Smith]

Hey Wayne

Did it have a strong alcohol type smell

ie a brewery

 

 

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[welwell]

Hello Ross. Hope you're doing well. Despite the fact it's in a pub garden there wasn't a distinct brewery smell!!!

[treeseer]

Perhaps that side is not so thrifty because the food once made from that big limb is no more. Add increased heat etc. from exposure, plus root death in response to branch loss, , plus the need to grow scar tissue, and that's bound to be bad for the tree.

 

Trees are often hurt by 'collar cuts'.

 

The leaking seems of little consequence; would a scrub and a rinse be good?

[welwell]

I think it's coincidence personally, we've seen these thousands of times before, it's just caught my eye on passing

[J Rayner]

Stem bleeding cankers can be caused by a few Phytophthora; Forest Research - Bleeding on oak stems

 

It can also be a symptom of Acute Oak decline; Forest Research - Acute oak decline

 

Is the tree in the southeast? If so, it's within AOD's area of distribution.

 

Worth keeping an eye on.

 

James

[welwell]

It is more in the south rather than SE. I will advise regular checks. Thanks for the help.

[treeseer]

Stem bleeding cankers can be caused by a few Phytophthora; It can also be a symptom of Acute Oak decline;

 

It can also be caused by sap leaking from underoccluded sites of severance.

 

 

 

 

aka nothing special. Yes indeedy worth a return check.

 

 

And perhaps scrub and rinse, to get a baseline for observations.

[welwell]

It can also be caused by sap leaking from underoccluded sites of severance.

 

 

 

 

aka nothing special. Yes indeedy worth a return check.

 

 

And perhaps scrub and rinse, to get a baseline for observations.

 

This I think is what the issue is, but we will keep check on it.