Galls on Ulmus tree leaves?

Discussion in 'Plants: Conservation' started by ariani, May 18, 2016.

  1. ariani

    ariani Active Member

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    These galls on Ulmus sp. tree leaves are caused by an insect but I do not know the name. Can you help me please and is it infestation to other trees around?
     

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  2. Daniel Mosquin

    Daniel Mosquin Renowned Contributor UBC Botanical Garden Forums Administrator Forums Moderator 10 Years

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