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Thread: Unusual Maple Deformity

  1. #1
    Join Date
    Feb 2018
    Location
    Harshaw, WI
    Posts
    6

    Default Unusual Maple Deformity

    Hi Guys,

    Hoping someone can point me in the right direction on the attached photo (sorry it turned sideways). I have a number of maple trees in a particular area of my property in northern Wisconsin that have this unusual bulge. Ive seen it in numerous maples of varying size, from saplings to 12 diameter. The deformity always appears to be about 5 feet up on every tree that I notice it on. Surprisingly, the crowns on all of these trees look to be healthy.

    Has anyone experienced this before? Disease, bugs, etc? Should I cut these all down to prevent it from expanding?

    Thanks for any advice.
    Attached Images Attached Images

  2. #2
    Join Date
    Jan 2017
    Location
    Goderich, On
    Posts
    15

    Default

    Quote Originally Posted by Bowhunting Guy View Post
    Hi Guys,

    Hoping someone can point me in the right direction on the attached photo (sorry it turned sideways). I have a number of maple trees in a particular area of my property in northern Wisconsin that have this unusual bulge. I’ve seen it in numerous maples of varying size, from saplings to 12” diameter. The deformity always appears to be about 5 feet up on every tree that I notice it on. Surprisingly, the crowns on all of these trees look to be healthy.

    Has anyone experienced this before? Disease, bugs, etc? Should I cut these all down to prevent it from expanding?

    Thanks for any advice.
    I believe this is a canker. I have heard different people say they can spread in the wind which seems really strange to me but I have no reason to doubt them.

    I would cut these trees myself


    Sent from my iPhone using Tapatalk

  3. #3
    Join Date
    Feb 2006
    Location
    Catskill Mountains
    Posts
    1,750

    Default

    That is damage done by a maple borer.

  4. #4
    Join Date
    May 2009
    Location
    UVM Proctor Maple Research Center, Underhill Ctr, VT
    Posts
    4,076

    Default

    I think you're both (Bowhunting Guy and Mountainvan) right. Although the photo is very low resolution and hard to see much detail, it appears that the original wound may have been from a maple borer, but it was later infested with Eutypella canker.

    Cut it, get the affected section out of the woods, and burn it to prevent spore release.

    https://www.fs.usda.gov/naspf/sites/...aple_borer.pdf
    https://www.fs.usda.gov/Internet/FSE...ev2_043571.pdf
    Dr. Tim Perkins
    UVM Proctor Maple Research Ctr
    http://www.uvm.edu/~pmrc
    Timothy.Perkins@uvm.edu

  5. #5
    Join Date
    Feb 2018
    Location
    Harshaw, WI
    Posts
    6

    Default

    Thanks for the great info guys (and for the PDFs Dr. Tim). I will take your advice and cut these trees.

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