Japanese maple advice needed

Discussion in 'Maples' started by tiffanya, May 3, 2006.

  1. tiffanya

    tiffanya Member

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    Re: Japanese maple advice please

    My japanese maple is having problems. Outward appearances indicate it could be Verticillium Wilt; however, I don't see its trademark sign in the interior.

    Images are at:
    http://davesgarden.com/forums/t/597416/

    Any advice?

    Thanks,
    -Tiffany
     
  2. Daniel Mosquin

    Daniel Mosquin Paragon of Plants UBC Botanical Garden Forums Administrator Forums Moderator 10 Years

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    "Only paid subscribers may view the full-size forum photos." - so we can't see the images (or any replies so far) on Dave's Garden.
     
  3. jimweed

    jimweed Active Member 10 Years

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    I would think the only way to really know if you maple has verticilium wilt, is to have a sample diagnosed under a microscope at a lab. From that little pic, it has the look of v.wilt, but that same die back could be caused by other things, heat or drought stress, herbicide or any other oil based insecticides, even safers soap can fry a *** maple. Planted to deep with soil too high up the trunk. My 2 cents. Jim.
     
  4. Ron B

    Ron B Paragon of Plants 10 Years

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    More than one pathogen attacks Japanese maples.
     
  5. schusch

    schusch Active Member Maple Society 10 Years

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  6. tiffanya

    tiffanya Member

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    I talked to our local Land Grant College (WSU) and will be delivering samples to them today. It is sounding more and more like Verticillium Wilt, unfortunately, and not various other pathogens w'eve discussed. They also said that if V.Wilt is confirmed no susceptible species should be planted in the area for ~20 years! Egads. I love maples. This is saddening.
     
  7. jimweed

    jimweed Active Member 10 Years

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    After 20 yrs of spraying trees, against all info about V.wilt, I find that deeproot fertilizing, copper spraying in the fall and and sulpher spraying in the winter, and after a few years, possiblely increasing the strength and vascular system of the tree, allowing the larger sized cells of the disease to pass through the plant without blocking up the joints to cause dieback, seems to really help save japanese maples. I've treated maples that were just about toast, and once dead was removed, and 5 or so years later with those regular treatments, show absolutely no more signs of dieback. I hope to do a Thesis on this one day if I ever graduate my Bsc. This is just my opinion and is against everything written on verticilium wilt. Your tree looks fairly new and easily replaced, the trees I've treated are like much older and established and harder to replace. Hope your tree doen't have any type of baterial blight. Jim
     
  8. tiffanya

    tiffanya Member

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    Update: Took specimens to the WSU Plant Pathology Lab. They're running tests. Initial visual review is likely to rule out V.Wilt. Probably too new of planting to be a form of root-rot. Hopefully the agars/tests will tell us something.
     
  9. Wanda4

    Wanda4 Member

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    Hi Tiffany,
    Didn't you say on Dave's Garden that it had gotten hit with frost? That could present
    some of the same appearances of Vert. Wilt.

    Wanda
     

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