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Maple > Leaves > Irregular growths or bumps on leaves

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  • Image: Maple bladder gall 1
    Credit: C. Ash Kanner
  • Image: Maple bladder gall 2

    Credit: J. O'Brien, USDA Forest Service, Bugwood.org

  • Image: Maple bladder gall 3

    Credit: J. Hahn, University Of Minnesota

  • - CLICK PHOTOS TO ENLARGE -

green arrowMaple bladder gall
Vasates quadripedes

  • Pinkish, reddish or greenish 1/8th inch bladder-like bumps on underside of leaves
  • Caused by eriophyid mites which are microscopic
  • First formed in spring shortly after leaves expand
  • More information on Maple bladder gall...
2 of 3
  • Image: Maple spindle gall 1
    Credit: C. Ash Kanner
  • Image: Maple spindle gall 2

    Credit: R. Koetter, University Of Minnesota

  • Image: Maple spindle gall 3

    Credit: R. Koetter, University Of Minnesota

  • - CLICK PHOTOS TO ENLARGE -

green arrowMaple spindle gall
Vasates aceriscrumena

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  • Image: Maple velvet gall 1
    Credit: W.M. Ciesla, Forest Health Mgmt. Intl., Bugwood.org
  • Image: Maple velvet gall 2

    Credit: J. Hahn, University Of Minnesota

  • - CLICK PHOTOS TO ENLARGE -

green arrowMaple velvet gall
Aceria aceris

  • Whitish or reddish woolly or fuzzy growth that is circular or oval on leaf surface
  • Caused by eriophyid mites which are microscopic
  • First formed in spring shortly after leaves expand
  • More information on Maple velvet gall...

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