Hyaloperonospora parasitica (Persoon) Constantinescu, 2002
on Brassicaceae, (Cleomaceae)
Capsella bursa-pastoris, Loenen (ge), 7.vi.2021 © Arnold Grosscurt: infected plant
detail
Capsella bursa-pastoris, Belgium, prov. Antwerp, Mol, Heidenhuizen © Carina Van Steenwinkel
down
loaded conidiophore
the stem of the conidiophore is relatively stout, and the terminal branchlets look claw-like
conidia
Capsella bursa-pastoris, Nieuwendam
conidiophore
detail
conidium
gall
upperside of the leaves locally bleached and galled; at the corresponding underside a greyish-white fungal down consisting of erect conidiophores; towards the tip they are several times branching under a right angle. Conidia with a rounded tip. In the plant tissue locally oospores are formed, and particularly there galling occurs.
host plants
Brassicaceae, (Cleomaceae), narrowly polyphagous
Biscutella laevigata; Capsella bursa-pastoris; Cardamine amara, trifolia; Cardaria draba; Cleome hassleriana; Crambe maritima; Diplotaxis erucoides, tenuifolia; Erysimum diffusum, cheiranthoides, crepidifolium, hieracifolium, repandum; Hornungia alpina; Lepidium campestre, cartilagineum, densiflorum, latifolium, ruderale, sativum, virginicum; Sisymbrium volgense.
Also Sinapis arvensis (Sert & Stimbtil).
A refere nce by Özaslan ao to Myagrum perfoliatum may apply to Peronospora myagri.
synonyms
Peronospora parasitica (Persoon) Fries, 1849; P. biscutellae Gäumann, 1918; P. lepidii-sativi Gäumann, 1918.
notes
This species often occurs combined with Albugo candida; in these cases the galling is much stronger expressed.
references
Abdul Haq, Shahzad & Qamarunnisa (2015a), Blumer (1946a), Buhr (1964b), Chater, Woods, Stringer, ao (2020a), Choi, Constantinescu & Shin (2007a), Constantinescu & Fatehi (2002a), Dauphin & Aniotsbehere (1997a), Doppelbaur & Doppelbaur (1973a), Doppelbaur, Huber & Poelt (1965a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), Göker, Voglmayr, Riethmüller ao (2003a), Gustavsson (1991a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Kruse ao (2022b), Müller (2015a), Müller & Kokeš (2008a), Mułenko, Kozłowska, Bacigálová ao (2014a), Negrean (1996b), Negrean, Constantinescu & Denchev (2004a), Özaslan, Boyraz & Güncan (2017a), Porta-Puglia & Mifsud (2006a), Redfern & Shirley (2011a), Riethmüller, Voglmayr, Göker ao (2002a), Roskam (2009a), Ruszkiewicz-Michalska (2006a), Ruszkiewicz-Michalska & Michalski (2005a), Săvulescu (1948a), Scheuer & Bechter (2012a), Sert & Stimbtil (2003a), Tomasi (2014a), Voglmayr (2003a).