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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Annuals and Perennials > Columbine > Spots on leaves

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Columbine > Spots on leaves

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  • Image: powdery mildew 1
  • Image: powdery mildew 2
  • Image: powdery mildew 3

Powdery Mildew
Erysiphe cichoracearum

  • Powdery, fluffy, white spots or blotches on leaves and stems
  • Tiny raised black dots may be visible within white spots late summer or early fall
  • Spots typically start on lower leaves, but can spread to cover the entire plant
  • Severely infected leaves may be completely covered in white or grayish white fungi
  • In some cases, leaves become curled or twisted or turn yellow due to the infection
  • More information on Powdery Mildew...
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  • Image: leafminer 1
  • Image: leafminer 2

Columbine leafminer

  • Occurs during spring
  • Causes meandering trails inside the leaves; this damage affects the appearance but doe not injure the plant
  • Adult flies are not noticed when they are laying eggs and the larvae are hidden inside the leaves and not seen

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