Identification: Parasitical Growth on Wild Juniper??

Discussion in 'Pacific Northwest Native Plants' started by WesternWilson, Jul 12, 2011.

  1. WesternWilson

    WesternWilson Active Member 10 Years

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    Can anyone identify and hopefully educate me on the orange stuff we found growing on a juniper outside our high altitude cabin (Lytton area), below?

    Thanks!
    Janet
     

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  2. Daniel Mosquin

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

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  3. Michael F

    Michael F Paragon of Plants Forums Moderator 10 Years

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    Juniper-apple rust Gymnosporangium sp.
     
  4. WesternWilson

    WesternWilson Active Member 10 Years

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    Thankyou, gentlemen! Now to find the offending apple tree...this is a very remote area and I have never noticed an apple anywhere close by.

    Regards,
    Janet
     
  5. Michael F

    Michael F Paragon of Plants Forums Moderator 10 Years

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    Some of the Gymnosporangium species attack hawthorns and other related plants, not apples.
     
  6. WesternWilson

    WesternWilson Active Member 10 Years

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  7. Michael F

    Michael F Paragon of Plants Forums Moderator 10 Years

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    Gymnosporangium species generally cause more damage to the hawthorn / apple etc host than they do to the juniper. The yellow thing you found is unsightly, but it tends not to cause serious harm. Usually it is apple growers trying to eradicate all the local junipers to protect their crop.
     

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