Unusual growth on tree leaves - please help identify

Discussion in 'Garden Pest Management and Identification' started by RBGINVAN, May 27, 2009.

  1. RBGINVAN

    RBGINVAN Member

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    Vancouver west side
    Can anybody explain the conical growths on the leaf in the picture? This was a "show and tell" from a child so I don't have any information on what kind of tree it came from. The growths are about 5mm high

    Bob
     

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  2. Michael F

    Michael F Paragon of Plants Forums Moderator 10 Years

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    Location:
    Britain zone 8/9
    Galls produced by Eriophyes mites, most likely Eriophyes tiliae. They don't cause any significant harm.

    The tree is a Common Lime Tilia × europaea.
     

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