Peronospora holostei Caspary, 1854

on Holosteum

Peronospora holostei on Holosteum umbellatum

Holosteum umbellatum, Poland, Owczary, 13.iv.2019 @ Sébastien Carbonelle

Peronospora holostei on Holosteum umbellatum

flowers, despite the infestation

gall

the plants are stunted and hardly come into flower; at the underside of the leaves a greyish purple fungal down, consisting of erect, distally repeatedly dichotomously branching conidiophores. The conidia measure 15-26 x 18-28 µm. The fungus is systemic.

host plants

Caryophyllaceae, monophagous

Holosteum umbellatum.

references

Belbahri, Calmin, Pawlowski & Lefort (2005a), Brandenburger (1985a: 100), Buhr (1964b), Dauphin & Aniotsbehere (1997a), Doppelbaur, Huber & Poelt (1965a), Göker, García-Blázquez, Voglmayr ao (2009a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Müller (2015a), Müller & Kokeš (2008a), Negrean, Constantinescu & Denchev (2004a), Săvulescu (1948a), Thines, Telle, Ploch & Runge (2009b), Voglmayr (2003a).

mod 20.viii.2019