Mycosphaerella ulmi Klebahn, 1902

on Ulmus

Mycosphaerella ulmi on Ulmus laevis

Ulmus laevis, Hungary, Mosonmagyaróvár, 8.ix.2017 © László Érsek

Mycosphaerella ulmi on Ulmus laevis

same leaf, underside

Mycosphaerella ulmi on Ulmus laevis

upper surface leaf spots

Mycosphaerella ulmi on Ulmus laevis

detail

Mycosphaerella ulmi on Ulmus laevis

underside

Mycosphaerella ulmi on Ulmus laevis

detail

Mycosphaerella ulmi on Ulmus x hollandica

Ulmus x hollandica, Wouwsche Plantage: underside and upper side. The white spots at the underside of the leaf are conidial masses (perhaps a bit washed out by the rain of the day before).

Mycosphaerella ulmi on Ulmus spec. conidia masses

Ulmus spec., Belgium, prov. Flemish Brabant, Diest, Wallen © Carina Van Steenwinkel

Mycosphaerella ulmi on Ulmus spec.  extruded conidia mass

extruded conidia mass

Mycosphaerella ulmi: conidia

conidia

host plants

Ulmaceae, monophagous

Ulmus glabra, x hollandica, laevis.

synonyms

Phloeospora ulmi (Fries) Wallroth, 1833); Septoria ulmi Fries, 1819.

references

Brandenburger (1985a: 69), Dietrich (2016b), Ellis & Ellis (1997), Jage, Klenke, Kruse ao (2016a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Kruse (2014a), Quaedvlieg, Verkley, Shin ao (2013a), Scheuer & Bechter (2012a).

mod 2.iii.2019