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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous > Cotoneaster > Curled or stunted leaves

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Cotoneaster > Leaves > Curled or stunted leaves

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  • Image: Fire Blight 1

Woolly apple aphid
Erisoma lanigerum

  • Feeding causes curled and stunted terminal leaves
  • Adults produce white waxy material and form cottony white colonies
  • Normally feed on new growth, but may be found feeding on new bark near wound sites
  • Produce large amounts of sticky honeydew that is colonized by sooty mold
  • More information on Woolly Apple Aphid
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  • Image: Fire Blight 1
  • Image: Fire Blight 2
  • Image: Fire Blight 3

Sooty Mold

  • Black, brown or gray soot-like covering on leaf surfaces, twigs or branches
  • Sticky, shiny secretions on leaves from sap-sucking insects (e.g., wooly apple aphid)
  • Insects or signs of insect damage (distorted, pin-prick feeding marks, etc.) may be seen on leaves or twigs above the most heavily affected moldy areas.
  • More information on Sooty Mold

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