Peronospora arthurii Farlow, 1883

on Clarkia, Oenothera

Peronospora arthurii on Oenothera spec.

Oenothera spec., België, prov. Antwerpen, Mol © Carina Van Steenwinkel

Peronospora arthurii on Oenothera spec.

underside infected leaf

Peronospora arthuri: conidiophore

conidiophore

Peronospora arthurii: conidio

conidia

gall

upperside of the leaves with yellow spots. Corresponding parts of the underside with a violet-grey down, consisting of erect conidiophores that apically several times are dichotomously branching, each branch ending in an egg-shaped or lemon-shaped conidium.

host plants

Onagraceae, oligophagous

Clarkia unguiculata; Oenothera biennis & var. pycnocarpa, glazioviana, parviflora, pycnocarpa.

notes

an invasive species in Europe.

references

Beenken & Senn-Irlet (2016a), Belbahri, Calmin, Pawlowski & Lefort (2005a), Göker, García-Blázquez, Voglmayr ao (2009a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kruse (2014a, 2019a), Mułenko & Matejko Gosztyła (1997a), Mułenko, Piątek, Wołczańska ao (2010a), Müller & Kokeš (2008a), Ruszkiewicz-Michalska (2006a), Scheuer & Bechter (2012a), Thines, Telle, Ploch & Runge (2009b), Voglmayr (2003a).

mod 31.vii.2019