Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Hickory > Distorted or deformed leaves or petioles
Hickory > Leaves > Distorted or deformed leaves or petioles
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Hickory petiole gall
Phylloxera caryaecaulis
- Round galls, up to 1" across, found on leaf petioles and occasionally on leaflet midribs
- Galls begin to appear in early May and are fully-formed by mid-May
- Numerous galls may deform leaves
- Leaves fall prematurely late in summer and canopies appear thin
- More information on Hickory petiole gall
