Why is the bark on my tree turning black?

Gardens & Landscapes January 07, 2008|Print
The black material on the tree is probably sooty mold, a fungal growth that grows on 'honeydew'. Honeydew is the excrement produced by aphids feeding on the tree leaves. This fungal growth (sooty mold) can be seen on many tree species on the trunk, branches, twigs and leaves.

Connect with us

  • Facebook


eXtension is an interactive learning environment delivering research-based information emerging from America's land-grant university system.


Donate to Consumer Horticulture

Your donation keeps eXtension growing.

Give Now