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Hackberry tree #776325

Asked October 25, 2021, 11:20 AM EDT

We have a boulevard hackberry tree--we think-- (image 1) on a residential street that is losing its bark. A fungi appears growing where the bark has been lost at its base. It started at its base (image 2) and now also occurring at a large section of the trunk above the base (image 3). Half of the upper branches lost their leaves early this fall, while the other half fell as usual. Have no clue as to what has happened to the tree. Three linden trees also in our yard along the same street show no signs of stress. Yard watering system has been providing water all season. Would appreciate any advice/thoughts you could offer. Thanks Craig

Dakota County Minnesota

Expert Response

Based upon what we can see in the photos, we think you have identified the tree correctly.

Unfortunately the trunk appears to have been injured, perhaps years ago, and although the tree has generated considerable callus wood to close the wound, decay has progressed.

We can't determine the extent of the damage by viewing photos but we think it's advisable to ask a certified arborist to assess the tree's health and recommend a course of action.

If you decide to hire an arborist, this information may be helpful:

https://extension.umn.edu/planting-and-growing-guides/how-hire-tree-care-professional

Many Minnesota trees lost leaves prematurely this year due to drought but because only half of your tree was affected, trunk decay is the likely cause.

Go here for more useful information:

https://www.uaex.edu/environment-nature/forestry/health/PPFS-OR-W-1.pdf

An Ask Extension Expert Replied October 25, 2021, 12:10 PM EDT
Thank you so much.  Will contact city forester for more assistance.

Craig
On 10/25/2021 11:10 AM Ask Extension <<personal data hidden>> wrote:


The Question Asker Replied October 25, 2021, 12:20 PM EDT

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