Entyloma hieracii Sydow, 1919

on Hieracium, Pilosella

Pilosella officinarum, Belgium, prov. Limbourg, Hechtel-Eksel, Katershoeve, 8.xi.2022 © Carina Van Steenwinkel

affected leaf

same leaf, underside

Pilosella officinarum, Belgium, prov. Limbourg, Kuringen, Rode Vijvers, 12.xi.2022 © Carina Van Steenwinkel

spores in the leaf tissue

gall

flat, amphigenous leaf spots, up to a cm large, first yellow, finally brown and often with a perforated centre, with a pale border. Spores in the leaf tissue, ø 8-17 µm, transparent yellowish, smooth.

host plants

Asteraceae, narrowly oligphagous

Hieracium alpinum, amplexicaule, bifidum, caesium, chloropetalum, glaucnum, juranum, lachenalii & subsp. cruentifolium, laevigatum, lapponicum, maculatum, murorum, nigrescens, piliferum subsp. glanduliferum, pilosum subsp. villosiceps, prenanthoides, racemosum, sabaudum, schmidtii, sudeticum, transylvanicum, umbellatum, villosum; Pilosella aurantiaca, lactucella, officinarum, piloselloides.

references

Ainsworth & Sampson (1950a), Almaraz (1998a), Blumer (1946a), Brandenburger (1985a: 683), Buhr (1964b), Jage, Scholler & Klenke (2010a), Klenke (2002a), Klenke & Scholler (2015a), Kruse (2019a), Kruse, Thiel, Beenken ao (2018d), Savchenko & Heluta (2012a), Scholz & Scholz (2013a), Van Steenwinkel & Fraiture (2023a), Thiel, Klenke, Kruse, ao (2023a), Unamuno (1942a), Vanderweyen & Fraiture (2014a), Vánky (1994a).