Hyaloperonospora nasturtii-aquatici (Gäumann) Voglmayr, 2014

on Cardamine, Nasturtium

Cardamine hirsuta, Belgium, prov. Limbourg, 13.iv.2021 © Carina Van Steenwinkel

Cardamine flexuosa, Belgium, prov. Flemish Brabant, Averbode, Vierkensbroek, 2.iv.2021 © Carina Van Steenwinkel: early stage of infection

conidiophore

terminal branchings

conidia

conidium; size range was 15-18 x 18-22 µm.

gall

upperside of the leaf with pale spots, margin often downfolded. Underside with a greyish down of 0.9 mm high erect conidiophores that apically several times are branching, each tip bearing am ovoid conidium.

host plants

Brassicaceae, oligophagous

Cardamine amara, flexuosa, hirsuta, pratensis; Nasturtium officinale.

synonyms

Peronospora nasturtii-aquatici Gäumann, 1918.

references

Brandenburger (1985a), Buhr (1965a), Chater, Woods, Stringer, ao (2020a), Doppelbaur, Huber & Poelt (1965a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kruse (2019a), Müller (2015a), Tomasi (2014a).