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