Exobasidium japonicum
The fungus Exobasidium japonicum causes galls on the leaves of azaleas (Rhododendron cultivars of gardens). The galls cause the leaves to become large and fleshy, pale green at first then chalky white.
Large red, pink or peach coloured apple-galls caused by Exobasidium rhododendroni may be found on the leaves of some species and hybrids of Rhododendron
host 
Provide photos showing gall and host plant; ensure you have identified and noted the host species
Azaleas
Rare.
Jane Hollingworth
Quorn garden
03 June 2025
Jane Hollingworth
Quorn garden
03 June 2025
Ray Pearce
Shepshed garden
17 June 2018
on an Azalea
Ray Pearce
Shepshed garden
17 June 2018
Ray Pearce
Shepshed garden
17 June 2018
Ray Pearce
Shepshed garden
17 June 2018
Jane Hollingworth
Quorn garden
03 June 2025
Jane Hollingworth
Quorn garden
03 June 2025
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Species profile
- Common names
- Azalea Gall
- Species group:
- fungus
- Kingdom:
- Fungi
- Order:
- Exobasidiales
- Family:
- Exobasidiaceae
- Records on NatureSpot:
- 2
- First record:
- 17/06/2018 (Pearce, Ray)
- Last record:
- 03/06/2025 (Hollingworth, Jane)
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