Identification: Reddish-Orange Swellings on Apple Tree Bark

Discussion in 'HortForum' started by graftingwax, Mar 23, 2011.

  1. graftingwax

    graftingwax Member

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    Location:
    Perth County, Ontario, Canada
    The other day I noticed these small (~1/4" dia.) swellings on some of the 1yr apple trees in my nursery. I did not see any on nearby pear or prunus trees.

    I cut one of the swellings through and it has a small black spot inside, I assume dead tissue. Some of the swellings had a scabby spot or crack in the middle.

    I live in central southern Ontario.

    Any help in identifying this appreciated!
    first.jpg

    second.jpg
     
  2. graftingwax

    graftingwax Member

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    Location:
    Perth County, Ontario, Canada
  3. vitog

    vitog Rising Contributor 10 Years

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    Need a better closeup photo without the snow causing underexposure. Put a piece of cardboard or something behind the tree trunk to block the view of the snow. It looks like it might be scale insects or perhaps just normal swelling of the buds before they open.
     
  4. graftingwax

    graftingwax Member

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    Location:
    Perth County, Ontario, Canada
    three.jpg four.jpg

    Here are some more pictures, I hope they are more clear. Click on them to enlarge.

    The raised areas are part of the bark and wood of the tree. They often occur close to a bud but not always.
     

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