Erysiphe polygoni
Erysiphe polygoni
Description
Erysiphe polygoni is a powdery mildew affecting Knotgrass and otehr species in the Polygonaceae family.
Identification difficulty
host 
Recording advice
Photograph on host plant, and add host species to the comments for your record.
Habitat
Frequently on Knotgrass (Polygonum aviculare or P arenastrum); also on Docks (Rumex), Persicaria and Knotweed (Fallopia) species
Geoffrey Hall
Leicester, London Road
08 September 2019
Leaves with chasmothecia
Graham Calow
Sapcote, Grace Road
06 September 2020
mildew on Knotgrass
Geoffrey Hall
Leicester, London Road
08 September 2019
Chasmothecia and asci
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