Fungus and rot on Tamarack tree

Asked July 4, 2017, 10:16 AM EDT

I noticed a fungus (growing rapidly) at the top of a 10 year old scar on my tamarack tree. Also, at the base of the scar, there are insect holes and rot. Is there any way to kill the fungus and seal the scar to prevent further rot? We love this tree and do not want to lose it. Thank you.

Hennepin County Minnesota

1 Response

The presence of the fungal fruiting body indicates that decay is well established in the trunk. This doesn't mean the tree is in danger of sudden death but it does mean the trunk is structurally weakened and the tamarack could be or become a hazard tree if its fall might endanger people or property. There is no way to eliminate the decay now that it is established.

Learn more here:
http://extension.psu.edu/pests/plant-diseases/all-fact-sheets/hazard-trees

Consider asking a forester or certified arborist to assess the tree's health onsite and recommend a course of action.