Erysiphe adunca
Erysiphe adunca is found on various species of willow and sallow (Salix) and Polar (Populus). The white fibres of the mycelium are on the surface of living leaves. The small spheres (chasmothecia) contain the asci and spores; colours range from white when very immature through yellow, orange, reddish brown, dark brown and finally black when fully mature.
Erysiphe capreae is found on Salix caprea (Goat Willow or Common Sallow) but not on other Salix species.
host 
Photograph on host plant, and add host species to the comments for your record. If this is on Salix caprea, the Common Sallow or Goat Willow with broad leaves, microscopic examination is needed.
On the leaves of Salix and Populus.
August to October.
Mark Skevington
Whetstone
11 October 2021
Underside of Salix sp. leaf
Mark Skevington
Whetstone
11 October 2021
Chasmothecia on leaf underside
Mark Skevington
Whetstone
11 October 2021
Underside
Mark Skevington
Whetstone
11 October 2021
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Species profile
- Common names
- Willow Mildew
- Species group:
- fungus
- Kingdom:
- Order:
- Family:
- Records on NatureSpot:
- 8
- First record:
- 09/09/2017 (lemmon, roy)
- Last record:
- 02/11/2022 (lemmon, roy)
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