Asked September 17, 2019, 5:20 PM EDT
I noticed a black jelly or tar like substance growing/oozing on the north side on the bottom 3 feet of one of my red oak trees!
Curious as to what it might be and if I need to take steps to correct this? Any help would be greatly appreciated!
Genesee County Michigan
This is interesting. I am having some experts at MSU taking a look at this. Is the tree showing any other symptoms such as limb dieback, early leaf drop or coloring, soft spots on bark, or sloughing bark?, Do you know the age of the tree? A picture of the whole tree may be helpful. We look forward to your response.
After consulting with our experts at MSU, Diagnostic Services Plant Pathologist
Jan Byrne, Ph.D. sent the following:
"The brown growths on the trunk of the tree are likely a
Tremella sp., a fungus. This is not a plant pathogen, but rather is just
growing on the bark surface. As a result, there is no action needed in
regard to control. "
This is what they refer to as a Jelly Fungus. There are also some Jelly Fungus that are similar such as Bulgaria inquinans or Exidia glandulosa.