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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous > Hawthorn > Fruit deformed or with unusual growths

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Hawthorn > Fruit/flowers > Fruit deformed or with unusual growths

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Quince rust
Gymnosporangium clavipes

  • Fruit and stems may be swollen or distorted
  • Some yellow to orange leaf spots may be present
  • Tubular, white fungal spore producing structures protrude from fruit, giving it a spiky appearance; become orange when spores are released
  • Bright orange powdery spores may be seen on and around infected leaves and fruit
  • More information on Quince rust...

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