Entyloma calendulae (Oudemans) de Bary, 1874

on Calendula

Calendula officinalis, België, prov. Antwerpen, Mol, 31.viii.2021 © Carina Van Steenwinkel: infected plant

detail

infected leaf, lighted from behind

mass of spores

spores

germinating spores with anamorph

detail

anamorph conidia

gall

numerous leaf spots, 1-5 mm in size, weakly thickened, changing in colour from yellowish white to light brown. Inside yellowish, smooth-walled spores are formed, 8-13 x 9-16 µm.

host plants

Asteraceae, oligophagous

Calendula arvensis, officinalis, suffruticosa & subsp. fulgida; Dimorphotheca.

references

Ainsworth & Sampson (1950a), Almaraz (1998a), Beenken & Senn-Irlet (2016a), Beltran Tejera (1976a), Brandenburger (1985a: 653) , Buhr (1964b), Hafellner (1980a), Jage, Klenke, Kruse ao (2016a), Klenke (2002a), Klenke & Scholler (2015a), Kruse (2019a), Lutz & Vánky (2009a), Mułenko, Piątek, Wołczańska ao (2010a), Negrean & Anastasiu (2006a), Savchenko & Heluta (2012a), Scheuer & Bechter (2012a), Scholz & Scholz (2013a), Spooner & Butterfill (1999a), Thiel, Klenke, Kruse, ao (2023a), Unamuno (1941a), Vanderweyen & Fraiture (2014a), Vánky (1994a), Woods, Chater, Smith ao (2018a), Zwetko (1993a).