Peronospora aestivalis Sydow, 1923

on Medicago

Medicago sativa, Belgium, prov. Flemish Brabant, Wespelaar © Carina Van Steenwinkel

same leaf, underside

onidiophore

ultimate branches

conidia

gall

development of the plant disturbed; upperside of the leaf with yellow spots. Underside there with a brownish purple down of 0.5 mm high erect conidiophores that apically several times are dichotomously branching, each branch ending in a conidium of 9-27 x 16-37 µm with a verrucose to smooth surface.

host plants

Fabaceae, monophagous

Medicago falcata, intertexta subsp. ciliaris, littoralis, polymorpha, sativa, truncatula, x varia.

references

Brandenburger (1985a), Buhr (1964b), Chater, Woods, Stringer, ao (2020a), Cunnington (2008a), Doppelbaur, Huber & Poelt (1965a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), García-Blázquez, Göker, Voglmayr ao (2008a), Göker, García-Blázquez, Voglmayr ao (2009a), Göker, Voglmayr, Riethmüller ao (2003a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kruse (2019a), Müller & Kokeš (2008a), Negrean (1996b), Redfern & Shirley (2011a), Riethmüller, Voglmayr, Göker, Weiß & Oberwinkler (2002a), Ruszkiewicz-Michalska (2006a), Sävulescu (1948a), Voglmayr (2003a).