Dothidella ulmi (Schröter) Theissen & von Sydow, 1915

on Ulmus

Ulmus minor, Biddinghuizen, Spijk- en Bremerbergbos © Hans Jonkman

detail

section through a stroma with ascomata

Ulmus procera, Hungary, Mosonmagyaróvár, 15.viii.2018 © László Érsek: early infection

Ulmus procera, HunGary, Kamaraerdő, 11.ix.2018 © László Érsek: further infection

detail of a stroma

transverse section

parasiet

Ascomata embedded in black, epiphyllous, crustose stromata just below the epidermis,

hostplants

Ulmaceae, monophagous

Ulmus minor, procera.

synonyms

Platychora ulmi (Schröter) Petrak, 1925; Systremma ulmi (Duval) Winter, 1886; Dothidea ulmi (Duval) Fries, 1823.

notes

According to Gremmen and Brandenburger the anamorph is Piggotia astroidea (Berkeley) Berkeley & Broome, 1851.

references

Brandenburger (1985a: 69), Buhr (1965a), Ellis & Ellis (1997a). Gremmen (1949a), Miles (1920a), Moret i Benaset & Nadal i Puigdefabregas (1984a).