Peronospora myosotidis de Bary, 1863

on Brunnera, Myosotis

Peronospora myosotidis on Myosotis spec.

Myosotis spec., Belgium, prov. Limbourg, Beringen, Kolenhaven, 3.vi.2019 © Carina Van Steenwinkel

Peronospora myosotidis on Myosotis spec.

infected leaves

Peronospora myosotidis on Myosotis spec.

down

Peronospora myosotidis: conidiophore

conidiophore

Peronospora myosotidis: conidiophores

conidiophore, terminal branches

Peronospora myosotidis: conidium

conidium

gall

upperside of the leaf with pale spots, margin often down-folded. Underside with a brownish purple down of 1 mm high erect conidiophores that apically several times are dichotomously branching, each tip bearing a ± globular conidium.

host plants

Boraginaceae, oligophagous

Brunnera macrophylla; Myosotis arvensis, discolor, latifolia, laxa & subsp. caespitosa, nemorosa, ramosissima, scorpioides, sparsiflora, stricta, sylvatica.

references

Brandenburger (1985a: 521), Buhr (1964b), Chater, Woods, Stringer, ao (2020a), Dietrich (2016b), Doppelbaur & Doppelbaur (1973a), Doppelbaur, Huber & Poelt (1965a), Göker, García-Blázquez, Voglmayr ao (2009a), Gjaerum (1980a), Henricot (2009a), Jage, Klenke, Kruse ao (2016a, 2017a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Melzer, Pittoni, Poelt & Scheuer (1984a), Müller (2015a), Müller & Kokeš (2008a), Mułenko, Kozłowska, Bacigálová ao (2014a), Mułenko, Sałata & Wołczańska (1995a), Negrean (1996b), Riethmüller, Voglmayr, Göker ao (2002a), Săvulescu (1948a), Voglmayr (2003a).