Venturia pyrina Aderhold,1896

pear scab

on Pyrus, etc.

Pyrus communis, Hungary, Mosonmagyaróvár, 27.vi.2012 © László Érsek

fissures develop

galled leaf

Pyrus communis, Belgium, prov. Limbourg, Kerkhoven, den Tip, 31.v.2018 © Carina Van Steenwinkel

same leaf, underside

detail of a leaf spot

damaged fruit

conidia formation

conidia

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. Also on the branches lesions may develop. Sexual reproduction takes place in perithecia that are formed in spring on the overwintered fallen leaves. Conidiophores angular, niet annulate. Conidia solitary, smooth, olive brown, 5-11 x 10-34 µm, 0-1-septate.

host plants

Rosaceae, oligophagous

Eriobotrya japonica; Malus coronariaMalus coronaria, domestics, Pyrus communis & subsp. pyraster, spinosa.

synonyms

Venturia pirina.

references

Brandenburger (1985a: 259, 260), Buhr (1965a), Ellis & Ellis (1997a), Kozłowska, Mułenko & Heluta (2015a), Melgarejo Nárdiz, García-Jiménez, Jordá Gutiérrez ao (2010a), Moret i Benaset & Nadal i Puigdefabregas (1984a), Roques, Cleary, Matsiakh & Eschem (2017a), Roskam (2009a), Ruszkiewicz-Michalska & Połeć (2006a), Schubert, Ritschel & Braun (2003a), Tomasi (2003a), Unamuno (1943a).