Wilsoniana amaranthi (Schweinitz) Choi, Thines & Shin, 2007
on Amaranthus
hostplants
Amaranthaceae, monofaag
Amaranthus blitum, bouchonii, cruentus, hybridus, powellii, retroflexus.
gall
white cushions or crusts, initially shining like porcelain, ultimately powdery; they consists of bundles of conidia-chains. Later in the year oospores are formed, embedded in the plant tissue. This happens in various, brownish discoloured, parts of the plant, especially in the inflorescence. Characteristic for this species is the fact that the wall of the oospores has ridges forming a reticulate pattern.
notes
originally an American species.
synonym
Albugo amaranthi (Schweinitz) Kuntze, 1891.
references
Jage, Klenke, Kruse ao (2017a), Jage, Kruse, Kummer ao (2013a), Klenke & Scholler (2015a), Kruse (2019a), Kummer (2012a), Müller (2015a), Müller & Kokeš (2008a), Negrean (1995a), Redfern & Shirley (2011a), Tóth (1994a), Voglmayr & Riethmüller (2006a).