Bark damage #2
Email 2: I have bark damage on 2 parts of a black willow tree. On the thinner trunks the damage goes as high as 4-6 feet and 10-12 feet. Some pieces are found on the ground. This is new as of this week. On the thicker trunk the damage is in wider sections and is at about 4-6 feet high. Photos attached of thicker trunk. Separate email/pics for other damage. What is causing it? What can we do? Will the tree be ok? Thx!
Carver County Minnesota
Hello and thank you for contacting AaE for help.And thank you for all the pictures in the two emails you sent. The best I can tell is that your tree may have Armillaria root rot. More information about Armillaria root rot is available on this U of Mn Extension web page.
Armillaria root rot
- Infected trees have poor growth, dead branches in the upper canopy, undersized and/or yellow leaves
- Flat white sheets of fungal growth (mycelial fans) between the bark and sapwood at the base of infected trees
- Thick black, shoestring-like fungus can sometimes be seen under the bark, around roots and in the soil around the base of the tree
- Wood is decayed, white, soft and spongy; this may extend from the base of the tree well up into the trunk
- Trees frequently break or fall over in storms
- Clusters of honey-colored mushrooms may grow at the base of the tree in fall