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Thread: Red spots on silver maple leaf

  1. #1
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    Default Red spots on silver maple leaf

    Dose anyone know what is up with this silver maple leaf?20190711_112540.jpg20190711_112615.jpg

  2. #2
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    I'm just guessing but I suspect it could be a fungus because of too much rain. I have not seen that before. does it rub off, or is it right in the leaves?
    Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
    Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
    Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
    After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.

  3. #3
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    I think it can be rubbed off, we never tried. The red dose not show on the front of the leaf which I would assume that it is not a fungus.
    The story behind the leaves is I dropped of some syrup at a greenhouse that sells my syrup and there was a gentalmen who brought the leaf in to have the owner of the greenhouse take a look at, just to see if it's a serious disease or if it's something not to worry about and none of us had a clue to what it was so I told them that I would post on here and see if anyone else has seen or know anything about the red dots.

  4. #4
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    Do you know if all the leaves have the red coloring or are some of them black?

  5. #5
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    Hard to tell from the photos, but I'd say EITHER maple gall mites (most likely maple velvet erineum gall--silver maple is a common host), some type of fungus, or a Mg deficiency (in that order). Get some better close ups of the red spots. Do they look like little bumps, or felt-like, or is the red area flat?

    Fact sheet for galls at https://ohioline.osu.edu/factsheet/ENT-60

    Not a lot you can do about it at this point, and not really anything to worry about. Mostly just looks strange.
    Last edited by DrTimPerkins; 07-15-2019 at 04:13 PM.
    Dr. Tim Perkins
    UVM Proctor Maple Research Ctr
    http://www.uvm.edu/~pmrc
    https://mapleresearch.org
    Timothy.Perkins@uvm.edu

  6. #6
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    They looked/felt like felt when I was observing the leaf. The gentleman who brought the leaf said that there were a couple branches with all the leaves like the leaf in the photo. The owner of the greenhouse ruled out that it was a fungus.

  7. #7
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    It is most likely maple velvet erineum gall then. Velvet (felt-like) texture is diagnostic.
    Dr. Tim Perkins
    UVM Proctor Maple Research Ctr
    http://www.uvm.edu/~pmrc
    https://mapleresearch.org
    Timothy.Perkins@uvm.edu

  8. #8
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    Thanks guys for the help in finding out what it is.

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