Plant Parasites of Europe

leafminers, galls and fungi

Monilinia johnsonii

Monilinia johnsonii (Ellis & Everhart) Honey, 1936

on Crataegus

Monilinia johnsonii: leaf spots on Crataegus monogyna

Crataegus monogyna, Amstelveen, Schinkelbos

Monilinia johnsonii: leaf spot

Crataegus monogyna, Well (Li): leaf spot, with a group of conidiophores in the centre

Monilinia johnsonii: conidiophores



The anamorph (conidial stage) makes leaf spots. On the upperside or underside these have a small greyish colony of conidiophores. The teleomorh (sexual stage) makes small stalked, cupulate mushrooms on fallen, dried, fruits.

host plants

Rosaceae, monophagous

Crataegus monogyna.


Monilia crataegi Diedicke, 1904 (name of the anamorph)


Brandenburger (1985a), Ellis & Ellis (1997a), Ruszkiewicz-Michalska (2006a).

Last modified 16.viii.2019