Peronospora arvensis Gäumann, 1918

on Veronica

Peronospora arvensis on Veronica hederifolia

Veronica hederifolia, Belgium, prov. Limburg, Lummen, Meldert © Carina Van Steenwinkel

Peronospora arvensis on Veronica hederifolia

infected leaves

Peronospora arvensis on Veronica hederifolia

underside of an inefected leaf

Peronospora arvensis: conidiophore

conidiophore

Peronospora arvensis: conidia

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 a conidium.

hostplants

Plantaginaceae, narrowly monophagous

Veronica dillenii, hederifolia, sublobata, triloba, triphyllos.

A reference to V. arvensis by Negrean probably concerns P. agrestis.

references

Belbahri, Calmin, Pawlowski & Lefort (2005a), Brandenburger (1985a), Buhr (1965a), Doppelbaur, Huber & Poelt (1965a), Göker, García-Blázquez, Voglmayr ao (2009a), Göker, Voglmayr, Riethmüller ao (2003a), Klenke & Scholler (2015a), Kruse (2014a), Müller (2015a), Müller & Kokeš (2008a), Negrean (1996b), Riethmüller, Voglmayr, Göker ao (2002a), Ruszkiewicz-Michalska (2006a), Săvulescu (1948a), Scheuer & Bechter (2012a), Voglmayr (2003a).

mod 19.iv.2018