Erysiphe palczewskii (Jaczewski) Braun & Takamatsu, 2000
on Caragana, etc.
Caragana arborescens, Hungary, Budapest, 3.viii.2020 © László Érsek: leaf with beginning infection
underside
seriously infected leaf
underside
cleistothecia exceedingly numerous
leaf transverse section, with immature and mature cleistothecia
the appendages of the cleistothecia are strongly branched distally.
gall
mycelium amphigenous. Appressoria lobed, mostly single. Conidia solitary, elliptic, without fibrosin bodies. Cleistothecia with 3-13 asci, that contain 4-7 spores. Appendages 3-20, equatorial or a bit higher, 1-2.5 x the diameter; they have 0-1 sept, are rather stiff, almost hyaline, at the tip 5-8 times dichotomously branched in quick succession.
According to Klenke & Scholler the cleistothecia are very numerous, standing in dense groups.
host plants
Fabaceae, oligophagous
Caragana arborescens, aurantiaca, boisii, decorticans, densa, franchetiana, frutex, ? microphylla, sophorifolia, spinosa; Colutea arborescens; Robinia hispida, pseudoacacia; Styphnolobium japonicum.
synonyms
Microsphaera palczewskii Jaczeswki, 1927.
references
Bacigálová & Marková (2006a), Beenken & Senn-Irlet (2016a), Braun (1995a, 2000a), Braun & Cook (2012a), Bresinsky (2016a), Czerniawska (2001a), Dynowska, Fiedorowicz & Kubiak (1999a), Jage, Klenke, Kruse ao (2016a), Jage, Klenke & Kummer (2010a), Klenke & Scholler (2015a), Klіuchevych, Stoliar, Chumak, ao (2020a), Kozłowska, Mułenko, Anusiewicz & Wołkowycki (2019a), Kozłowska, Mułenko & Heluta (2015a), Korytnianska & Popova (2012a), Kruse (2014a, 2019a), Kuz’michev, Sokolova & Kulikova (2001a), Lebeda, Mieslerová & Sedlářová (2005a), Lebeda, Mieslerová, Sedlářová & Pejchal (2008a), Leysen (2017a), Mieslerová, Sedlářová, Michutová, ao (2020b), Mułenko, Piątek, Wołczańska ao (2010a), Negrean & Anastasiu (2006a), Ruszkiewicz-Michalska (2006a), Ruszkiewicz-Michalska & Michalski (2005a), Scheuer & Bechter (2012a), Schmidt & Scholler (2002a), Sucharzewska, Dynowska, Kubiak ao (2012b), Talgø, Sundheim, Gjærum ao (2010a).