Malus domestica, Dronten © Arnold Grosscurt

same leaf, underside

gall

During the summer leaf spots develop (also, as “scab” on the fruits) as a superficial mycelium where large masses of asexual conidia are formed. Sexual reproduction takes place in perithecia that are formed in spring on the overwintered fallen leaves. Conidiophores slender, smooth, annualate. Conidia solitary, olive brown, smooth, 7-10 x 14-23 µm, 0-1-septate.

host plants

Rosaceae, oligophagous

Amelanchier; Aronia x prunifolia; Cotoneaster integerrimus; Crataegus; Eriobotrya japonica; Malus baccata, domestica, x prunifolia, x purpurea, sylvestris; Photinia; Prunus; Pyracantha coccinea; Pyrus communis; Sorbus aria, aucuparia, domestica, intermedia, latifolia, torminalis.

synonyms

Fusicladium dendriticum (Wallroth) Fuckel, 1870; ; F. lalandi Marchal & Verplancke, 1926; F. pomi (Fries) Lind, 1913; Spilocaea pomi Fries; S. pyracanthae (Otth) von Arx, 1957.

references

Brandenburger (1985a: 256, 258), Buhr (1964b), Ellis & Ellis (1997a), Jage, Kruse, Kummer ao (2013a), Melgarejo Nárdiz, García-Jiménez, Jordá Gutiérrez ao (2010a), Roques, Cleary, Matsiakh & Eschem (2017a), Roskam (2009a), Ruszkiewicz-Michalska & Połeć (2006a), Schubert, Ritschel & Braun (2003a), Wilcox (1993a), Zhang, Crous, Schoch ao (2011a).