Plant Parasites of Europe

leafminers, galls and fungi

Peronospora grisea

Peronospora grisea (Unger) de Bary, 1863

on Veronica

Peronospora grisea op Veronica officinalis

Veronica officinalis, Belgium, prov. Limbourg, Gerhoeven, de Rammelaars, 13.vi.2021 © Carina Van Steenwinkel: infected plants turn pale, then brown, ultimately wither

Peronospora grisea op Veronica officinalis

infected plant

Peronospora grisea op Veronica officinalis

leaf underside with fungal down

Peronospora grisea op Veronica officinalis

infected inflorescence

Peronospora grisea op Veronica officinalis

conidiophore

Peronospora grisea op Veronica officinalis

ultimate branchings

Peronospora grisea op Veronica officinalis

conidia

gall

leaves pale, may be disfigured. Underside with a greyish-violet down, consisting of 0.4 mm high erect conidiophores that apically several times are dichotomously branching, each terminal branch ending in an ovoid conidium.

hostplants

Plantaginaceae, monophagous

Veronica alpina subsp. pumila, austriaca subsp. teucrium, beccabunga, bellidioides, fruticans, fruticulosa, longifolia, maritima, officinalis, opaca, prostrata, repens, salicifolia, scutellata, serpyllifolia, speciosa.

synonyms

Peronospora palustris Gäumann, 1918; P. saxatilis Gäumann, 1918; P. verna Gäumann, 1918.
P. palustris has been resurrected by Jage, Klenke, Kruse ao (2017a), with V. scutellata as only host plant (mentioned); no argumentation, reference or description is presented.

references

Belbahri, Calmin, Pawlowski & Lefort (2005a), Blumer (1946a), Brandenburger (1985a), Buhr (1965a), Cunnington (2008a), Doppelbaur & Doppelbaur (1973a, 1974a), Doppelbaur, Huber & Poelt (1965a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), Göker, García-Blázquez, Voglmayr ao (2009a), Göker, Voglmayr, Riethmüller ao (2003a), Gustavsson (1991a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a. 2019a), Kruse, Thiel, Frauenberger ao (2019a), Maire (1943a), Müller & Kokeš (2008a), Müller (2015a), Mułenko, Kozłowska, Bacigálová ao (2014a), Negrean (1995a), Negrean, Constantinescu & Denchev (2004a), Riethmüller, Voglmayr, Göker ao (2002a), Ruszkiewicz-Michalska (2006a), Ruszkiewicz-Michalska & Michalski (2005a), Săvulescu (1948a), Tomasi (2014a), Voglmayr (2003a).

Last modified 15.vi.2021