Trees – Treating Scarred Limbs

Q: I recently had a large tree cut down in my back yard. The tree service damaged a lot of healthy trees carrying out the logs. They swore that the best treatment to these scars was chain oil, which they rubbed on each bruise. What do you think?

A: I think the claim is baseless. Several studies show that applying tar/paint/oil to a tree wound only inhibits healing.