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 & Heluta (2015a), Korytnianska & Popova (2012a), Kruse (2014a, 2019a), 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).