spots/absesses

[Dnabro]

I have a White oak (I think it's a White oak) with black
rimmed large spots/absesses on the trunk (looking similar to that of where a
branch has been taken off at the trunk, but no branch has been taken off
there). Some are in the V where the tree divides. Disease??? Treatment???
Thanks - alley

 

[Treeman14]

I think its a canker disease. There is no direct treatment to cure this. Keep the tree as healthy as possible by pruning out infected limbs, providing adequate water and fertilizing if needed.

 

[John Paul Sanborn]

Sounds mor like a burl, sometimes a cluster of meristem that doesnt differentiate properly, some say due to virus. Could be from sprouts that die back fast.

http://glossary.*********.com/glossary/meristem.html