Podosphaera euphorbiae (Castagne) Braun & Takamatsu, 2000

on Chrozophora, Euphorbia

Euphorbia peplus, Belgium, prov. Antwerp, Retie, Witte Netevallei, 29.viii.2020 © Carina Van Steenwinkel

detail

conidiophore

detail

conidia

Euphorbia peplus, Belgium, prov. Liège, Héron, Couthuin, 26.xi.2018 © Philippe Vanmeerbeeck

gall

mycelium amphigenous, also on stems, dense, white, finally a brownish felt. Appressoria indistinct to nipple-shaped. Conidia formed in chains, with fibrosin bodies, elliptic, 12.5-16.5 x 24-34 µm. Cleistothecia with a single ascus, containing 8 spores. Appendages normally few, sub-equatorial, 0.5-2 x the diameter; mycelioid, hyaline or pale brown, septate, simple.

host plants

Euphorbiaceae, oligophagous

Chrozophora tinctoria; Euphorbia acalyphoides, agraria, aleppica, altissima, amygdaloides, aserbajdzhanica, balsamifera, biumbellata, boissieriana, carpatica, characias, condylocarpa, cyparissias, dulcis & subsp. purpurata, epithymoides, erineacea, esula & subsp. tommasiniana, exigua, falcata, flavicoma, helioscopia, heteradena, heterophylla, humifusa, hyberna & subsp. insularis, hypericifolia, iberica, lucida, macroclada, medicaginea, myrsinites, nicaeensis subsp. glareosa + stepposa, orientalis, oxyodonta, palustris, peplus, platyphyllos, pterococca, salicifolia, segetalis, seguieriana, semivillosa, serrata, soongarica, squamosa, stricta, terracina, variabilis, verrucosa, “villosa”.

synonyms

Sphaerotheca euphorbiae (Castagne) Salmon, 1902.

references

Blumer (1946a), Braun (1995a), Braun & Cook (2012a), Bresinsky (2016a), Czerniawska (2001a), Czerniawska, Madej, Adamska ao (2000a), Dynowska, Fiedorowicz & Kubiak (1999a), Hafellner (1980a). Heluta, Hayova, Tykhonenko ao (2010a), Jage, Klenke, Kruse ao (2016a), Jage, Klenke & Kummer (2010a), Klenke & Scholler (2015a), Korytnianska & Popova (2012a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Ruszkiewicz-Michalska (2006a), Ruszkiewicz-Michalska & Michalski (2005a), Scheuer & Bechter (2012a).