galls on leaves

Discussion in 'HortForum' started by ariani, May 30, 2015.

  1. ariani

    ariani Active Member 10 Years

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    What causes the galls on leave of Ulmus?
     

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    ariani, May 30, 2015
    #1
  2. Daniel Mosquin

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

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    Elm aphid gall?
     
    Daniel Mosquin, Jun 9, 2015
    #2

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