Extension > Garden > Diagnose a problem > What's wrong with my plant? > Fruit > Raspberry > Distorted/twisted leaves
Raspberry > Leaves > Distorted/twisted Leaves
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Spider Mites
Tetranychus urticae
- Feeding on the underside of leaves causes a “russet” appearance to the leaves; leaves may become distorted
- In heavy infestations, webbing can be found on underside of leaves
- Adult spider mites are very small (approximately 1/50 inch in length), and are yellow to dark crimson, with dark spots
- Mites usually appear in late June-August; more prevalent in hot, dry weather
- More information on Spider Mites
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Powdery Mildew
Podosphaera aphanis
- Young leaves curl inward
- Light green blotches develop on the upper surface of the leaves
- White patches may develop on leaf surfaces and fruit
- More information on Powdery Mildew
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Herbicide Injury
- Distorted and twisted leaves, margins of the leaf are often cupped upward
- Leaves appear yellow or bleached
- More information on Herbicide injury
