I have an oak tree that is about 60 years old maybe older. It has been loosing leaves early and is having more branches die each season. There is still life in the tree but it has lost 1/3-1/2 of the branches on the tree. There is a black tar like substance at the base of the tree on one side. I would be happy to send pictures if it will help. I a worried about the oak right next to this one if this is something that could spread. Please let me know if you know how I can save this tree.

Greetings Linda:

For immediate assistance, please contact a local certified arborist (yellow pages or Illinois Arborist Association Website).

Without more detailed information (i.e., exact species of your oak tree (white oak, pin oak, black oak, etc.); pictures, history of tree health and vigor; recent construction around or near the tree; location of tree in relation to the landscape; soil hydrology, flooding, drought, fertility, pH, etc.), it is difficult if not impossible to diagnose tree health concerns via this venue.

Feel free to send me some pictures and call me for additional assistance. However, I will likely refer you to a local tree care specialist for an on-site assessment.

I have a similar problem with a black tar substance which is around the base of the tree on the ground. The black tar substance has a very fine texture to it and turns brown after a few days\week. I have a picture of it if you would like me to send it.

Ray

Greetings Ray:

I would strongly encourage you to contact your state forestry agency or local university Exension office for technical assistance with regard to your tree pest and health concerns. Additionally, you should probably consider contacting a certified arborist for an on-site assessment of the tree.

Best of luck!