Bremia tulasnei (Hoffmann) Sydow, 1923

on Jacobaea, Senecio, Xerochrysum

Jacobaea vulgaris, België, prov. Antwerp, Mol © Carina Van Steenwinkel

underside of an infected part of the leaf

conidiophore (congo-red staining)

conidia

Jacobaea vulgaris, Belgium, prov. Antwerp, Mol, de Maat © Carina Van Steenwinkel

gall

externally hardly different from Bremia lactucae; molecular-genetic analyses nevertheless shows that is is an independent species.

host plants

Asteraceae, oligophagous

Jacobaea alpina, aquatica, subalpina, vulgaris; Senecio duriaei, elegans, gallicus, inaequidens, leucanthemifolius & subsp. vernalis, ovatus, polyodon, sylvaticus, viscosus, vulgaris; Xerochrysum bracteatum.

synonyms

Brandenburger and Klenke & Scholler consider tulasnei identical with B. lactucae.

references

Brandenburger (1985a), Chater, Woods, Stringer, ao (2020a), Choi & Thines (2015a), Doppelbaur & Doppelbaur (1974a), Doppelbaur, Huber & Poelt (1965a),Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kruse, Thiel, Beenken ao (2018d), Scheuer & Bechter (2012a), Thines, Runge, Telle & Voglmayr (2010a).