Jan 30, 2019
Powdery mildew fungus (Phyllactinia fraxini) producing chasmothecia on European ash (Fraxinus excelcior).
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Powdery mildew fungus (Phyllactinia fraxini) producing chasmothecia on European ash (Fraxinus excelcior).
Erysiphe symphoricarpi -powdery mildew fungus infecting western snowberry (Symphoricarpos occidentalis). Chasmothecia were densely clustered on the leaves. The appendages of the chasmothecia are clearly dichotomously branched, tips not recurved.