Podosphaera pannosa (Wallroth) de Bary, 1870

on Prunus, Rosa

Podosphaera pannosa: powdery mildew on Rosa sp.

Rosa sp., Dronten © Arnold Grosscurt

Podosphaera pannosa: powdery mildew on Rosa sp.

also on the underside

Podosphaera pannosa: conidia

Rosa spec., Nieuwendam: conidia

Podosphaera pannosa: conidiophore

conidiophore

Podosphaera pannosa: appressoriumPodosphaera pannosa: appressorium

appressoria

Podosphaera pannosa on Forsythia spec.

Forsythia spec., Hungary, Budapest, 15.v.2016 © László Érsek

Podosphaera pannosa on Forsythia spec.

infected leaf, upper side

Podosphaera pannosa on Forsythia spec.

underside

gall

mycelium white, often thick-felty, amphigenous, persistent, also on fruits and stems, sometimes causing malformations. Appressoria inconspicuous to nipple-shaped. Conidia formed in chains, with fibrosin bodies, oval. Cleistothecia with a single ascus, containing usually eight spores. Appendages not very numerous, sub-equatorial, 0.5-2 x the diameter, mycelioid, flaccid, brown, septate, unbranched.

host plants

Rosaceae, oligopgous

Prunus armeniaca, cerasus, domestica, dulcis, laurocerasus, lusitanica, mahaleb, nigra, persica, serotina, virginiana; Rosa agrestis, alba, arvensis, banksiae, canina, centifolia, chinensis, corymbifera, x damascena, davurica, filipes, foetida, gallica, inodora, luciae, macrophylla, majalis, multiflora, pendulina, pisocarpa, roxburghii, rubiginosa, rugosa, sherardii, spinosissima, tomentosa, villosa, virginiana, watsoniana, woodsii subsp. manca.

Occasionally Cotinus coggygria; Forsythia (Anacardiaceae, Oleaceae).

synonyms

Sphaerotheca pannosa (Wallroth) Léveillé, 1851; Oidium leucoconium Desmazieres, 1846.

references

Blumer (1946a), Braun (1995a). Braun & Cook (2012a), Bresinsky (2016a), Buhr (1965a), Czerniawska (2001a), Doppelbaur & Doppelbaur (1973a), Dynowska, Fiedorowicz & Kubiak (1999a), Ellis & Ellis (1997a), Heluta, Hayova, Tykhonenko ao (2010a), Ilie & Marinescu (2011a), Jage, Klenke, Kruse ao (2016a), Jage, Klenke & Kummer (2010a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Kruse & Jage (2014a), Kummer (2012a), Leus, Dewitte, Van Huylenbroeck ao (2006a), Losa España (1942a), Redfern & Shirley (2011a), Roques, Cleary, Matsiakh & Eschem (2017a), Săvulescu & Rayss (1935a), Scholler, Reinhard & Schubert (1996a), Talgø, Sundheim, Gjærum ao (2010a), Tóth (1994a), Unamuno (1943a).

mod 23.viii.2019