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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Maple > Irregular growths or bumps on leaves

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Maple > Leaves > Irregular growths or bumps on leaves

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  • Image: Maple bladder gall 1
  • Image: Maple bladder gall 2
  • Image: Maple bladder gall 3

Maple 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
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  • Image: Maple spindle gall 1
  • Image: Maple spindle gall 2
  • Image: Maple spindle gall 3

Maple spindle gall
Vasates aceriscrumena

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  • Image: Maple velvet gall 1
  • Image: Maple velvet gall 2

Maple 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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