Plant Parasites of Europe

leafminers, galls and fungi

Mycosphaerella pyri

Mycosphaerella pyri (Auerswald) Boerema, 1970

on Pyrus

Mycosphaerella pyri on Pyrus communis (Septoria stage)

Pyrus communis Belgium, prov. Limbourg, Grote Brogel, 20.vii.2023 © Carina Van Steenwinkel

Mycosphaerella pyri on Pyrus communis (Septoria stage)

advanced infection

Mycosphaerella pyri on Pyrus communis (Septoria stage)

infected lead, upper side …

Mycosphaerella pyri on Pyrus communis (Septoria stage)

… underside

Mycosphaerella pyri on Pyrus communis (Septoria stage)

leaf spot with pycnidia of the Septoria stage. Pycnidia at both upper side and underside of the leaf.

Mycosphaerella pyri on Pyrus communis (Septoria stage)

squashed pycnidium with conidia.

Mycosphaerella pyri on Pyrus communis (Septoria stage)

conidia

Mycosphaerella pyri on Pyrus communis (Septoria stage)

conidia 3-4 x (40)50-74(82) µm, often obscurely 2-septate.

parasite

Leaf spots with pycnidia; also on the fruits. Conidia hyaline to greenish, 3-5 x 45-60 µm, 2-septate. Teleomorph pycnidia with 15-23 asci, 11-13 x 60-75 µm, spores 3-4 x 26-33 µm, on dried leaves.

host plants

Rosaceae, monophagous

Pyrus communis & subsp. pyraster, elaeagrifolia.

synonyms

Septoria pyricola Desmazières, 1850; S. piricola.

references

Bahçecioğlu, Kabaktepe & Yildiz (2006a), Brandenburger (1985a: 260), Chatzidimopoulos & Pappas (2016a), Ellis & Ellis (1997a), Jage, Kruse, Kummer, ao (2013a), Ludwig (1974a), Ruszkiewicz-Michalska (2006a.

Last modified 23.vii.2023