Gymnosporangium sabinae (Dickson) Winter, 1884

on Pyrus

Gymnosporangium sabinae: spermogonia on Pyrus pyraster

Pyrus pyraster, Belgium, prov. Namue, Couvin (Frasnes), Carrière des Grosses Haies: spermogonia © Stéphane Claerebout

Gymnosporangium sabinae: spermogonia on Pyrus pyraster


Gymnosporangium sabinae: spermogonia on Pyrus pyraster

the underside of the leaf is clearly galled here

Gymnosporangium fuscum

Pyrus communis, Elburg © Arnold Grosscurt

Gymnosporangium fuscum

underside of leaf with aecia


in spring epiphyllous pustular spermogonia. Later large orange coloured hypophyllous gallings develop, with up to 2 cm high aecia, openng by a number of lateral slits.

spermogonia, aecia

Rosaceae, monophagous

Pyrus betulifolia, communis & subsp. pyraster, elaeagnifolia, nivalis, orientalis, pashia, pyrifolia, regelii, salicifolia, spinosa, syriaca.

on Juniperus


only telia, on swellings of the branches, ± conical, up to 2 mm high, yellowish brown when moist. Teliospores in two forms: hyaline, thin-walled, stout, and brown, thick-walled, slender; spores apically conical. They measure 20-30 x 38-40 µm; esch of the two cells with 2 germimnation pores close to the separation wall.


Cupressaceae, noarrowly monophagous

Juniperus chinensis, excelsa, oxycedrus, phoenicea, sabina, thurifera, virginiana.


Gymnosporangium fuscum de Candolle, 1905; Roestelia cancellata Rebentisch, 1804.


On pear very common, striking, and damaging.


Bahcecioglu & Kabaktepe (2012a), Belllmann (2012a), Blumer (1946a), Brandenburger (1985a: 29), Buhr (1964b), Chinery (2011a), Dauphin & Aniotsbehere (1997a), Deckert & Deckert (2016a), Dervis, Dixon, Doğanlar & Rossman (2010a), Gäumann (1959a), Gjærum, Gauslaa & Talgø (2008a), González-Fragoso (1925a), Groom (2011a), Helfer (2005a), Henderson (2000a, 2004a), Jage, Klenke, Kruse oo (2016a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Karlsson (2008a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a), Llorens i Villagrasa (1984a), Maier, Begerow, Weiß & Oberwinkler (2003a), Maier, Wingfield, Mennicken & Wingfield (2007a), Negrean (1996b, 1997a), Poelt & Zwetko (1997a), Preece & Hick (1994a), Redfern & Shirley (2011a), Riegler-Hager (2000a), Roskam (2009a), Scheuer & Bechter (2012a), Termorshuizen & Swertz (2012a), Unamuno (1941b), Vanderweyen & Fraiture (2008a), Wilson & Henderson (1966a), Woods, Stringer, Evans & Chater (2015a), Zhao, Liu, Li & Cai (2016a).


mod 16.xi.2017