Albugo candida (Persoon) Roussel, 1806
on Brassicaceae, Resedaceae
Cakile maritima, France, dép. Pas-de-Calais, Berck-sur-Mer, baie d’Authie, 29.ix.2022 © Stéphane Claerebout
Armoracia rusticana, Hungary, Mosonmagyaróvár, 8.viii.2012 © László Érsek
Capsella bursa-pastoris, Hungary, Budapest, 14.iv.2018 © László Érsek
opening sorus
Raphanus sativus, Hungary, Levél, 12.viii.2014 © László Érsek
glled fruits
Arabis glabra, Bulgaria, Polyantsi (Sofia), 22.vi.2021 © Cor Zonneveld
Sinapis arvensis, Belgium, prov. Hainaut, Vaulx-le-Tournai, 10.i.2018 © Sébastien Carbonelle
Capsella bursa-pastoris, Dronten © Arnold Grosscurt
Arabidopsis halleri, France, dép. Nord, Flines-lez-Raches © Sébastien Claerebout
Hirschfeldia incana, Belgium © Stéphane Claerebout

Diplotaxis tenuifolia, Belgium, Liège © Jean-Yves Baugnée
Diplotaxis tenuifolia, France, Dunkerque © Sébastien Carbonnelle
Eruca vesicaria, France, Paris, Jardin des Plantes © Sébastien Carbonnelle

Lunaria annua, Dronten: upperside of the leaf; det. Huub van der Aa, © Arnold Grosscurt

underside

Brassica napus, Amsterdam, Diemerpark: blister on the axis of the inflorescence

older ones burst open

the growth of parts of the inflorescence is severely disturbed

Sisymbrium officinale, Nieuwendam

intense red-colouration at the upperside

spore formation
hostplants
Brassicaceae, Capparaceae, Resedaceae, narrowly polyphagous
Alliaria petiolata; Alyssoides utriculata; Alyssum alyssoides, desertorum, montanum, repens, tortuosum subsp. caliacrae; Arabidopsis ? arenosa, halleri, petraea, suecica, thaliana; Arabis alpina & subsp. caucasica, aubrietioides, auriculata, caerulea, ciliata, collina, crispata, glabra, hirsuta, planisiliqua subsp. nemorensis, pumila, soyeri subsp. subcoriacea, stellulata; Armoracia rusticana; Aubrieta columnae, deltoidea, “intermedia”; Aurinia saxatilis; Barbarea intermedia, stricta, verna, vulgaris; Berteroa incana; Biscutella auriculata, intermedia, laevigata, valentina subsp. pyrenaica; Boechera holboellii; Brassica elongata, juncea, napus, nigra, oleracea, rapa; Braya alpina; Bunias ? erucago, orientalis; Cakile maritima; Calepina irregularis; Camelina microcarpa, sativa; Capsella bursa-pastoris, grandiflora, orientalis, rubella; Cardamine amara, enneaphyllos, flexuosa, hirsuta, impatiens, pratensis, trifolia, waldsteinii; Chorispora tenella; Cleome hassleriana, viscosa; Cleoserrata speciosa; Clypeola jonthlaspi; Cochlearia anglica, danica, officinalis; Coincya longirostra, monensis subsp. cheiranthos; Conringia orientalis; Crambe maritima, tataria; Descurainia sophia; Diplotaxis erucoides, muralis, tenuifolia, virgata; Diptychocarpus strictus; Draba aizoides, cuspidata, hispanica, incana, sauteri; Erophila verna; Eruca vesicaria; Erucastrum gallicum, nasturtiifolium; Erysimum aureum, bicolor, cheiri, cheiranthoides, crepidifolium, cuspidatum, diffusum, gorbeanum, hieraciifolium, humile, marschallianum, odoratum, repandum, rhaeticum, scoparium, wittmannii; Euclidium syriacum; Glastaria glastifolia; Heliophila amplexicaulis, crithmifolia, integrifolia; Hesperis matronalis; Hirschfeldia incana; Hornungia alpina, petraea; Hugueninia tanacetifolia; Hymenolobus procumbens; Iberis amara, carnosa, “pruittii”, umbellata; Isatis djurjudae, praecox; Kernera saxatilis; Lobularia maritima; Lunaria annua, rediviva; Malcomia africana, littorea, maritima, orsiniana subsp. angulifolia; Matthiola fruticulosa, incana; Murbeckiella pinnatifida; Myagrum perfoliatum; Nasturtium officinale; Neslia paniculata; Noccaea caerulescens, perfoliata; Petrocallis pyrenaica; Polenisia dodecandra; Pritzelago alpina & subp. auerswaldii; Pseudoturritis turrita; Raphanus raphanistrum, sativus & subsp. niger; Rapistrum perenne, rugosum; Schivereckia podolica; Schizopetalon walkeri; Sinapis alba, arvensis & subsp. allionii; Syrenia cana; Sisymbrium altissimum, austriacum, crassifolium, irio, loeselii, luteum, officinale, orientale, strictissimum, volgense; Teesdalia nudicaulis; Teesdaliopsis conferta; Thlaspi arvense.
synonyms
Cystopus candidus (Persoon) Léveillé, 1848.
notes
A. candida often is found in association with downy mildews, like Hyalopenorospora parasitica (Buhr, Redfern & Shirley), brassicae, or H. lunariae. As a matter of fact, Bains & Jhooty write that Albugo predisposes the plant for the mildew.
It has been shown that A. candida lives as an endophyte in many plants within the Brassicaceae, that are completely asymptomatic. Because also the fruits are infected, the fungus is transmitted from one generation to the other (Ploch & Thines).
DNA analysis has demonstrated a high degree of variation within this “species”.
Two albugo’s therefore have been set apart as independent species, viz. the parasites of Cardamine amara and pratensis, and the one of C. hirsuta, as A. leimonia and A. hohenheimia, respectively (Ploch ea, 210a).
references
Bains & Jhooty (2008a), Bellmann (2012a), Blumer (1946a), Brandenburger (1972a), Buhr (1964a, 1965a), Chater, Woods, Stringer, ao (2020a), Chinery (2011a), Choi, Shin, Hon & Thines (2007a), Constantinescu & Thines (2006a), Coulianos & Holmåsen (1991a), Dauphin & Aniotsbehere (1997a), Dietrich (2013a), Doppelbaur & Doppelbaur (1973a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), Gjaerum (1976a, 1980a), Gönczö & Révay (1981a), Haq, Shahzad & Qamarunnisa (2015a), Heluta, Hayova, Tykhonenko ao (2010a), Jacobson, LeFebvre, Ojerio ao (1998a), Jage, Klenke, Kruse ao (2016a, 2017a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Koops (2013a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Kruse & Jage (2014a), Losa España (1942a), Ludwig (1974a), Mayor (1967a, 1970a, 1971a), Melgarejo Nárdiz, García-Jiménez, Jordá Gutiérrez ao (2010a), Ruszkiewicz-Michalska & Michalski (2005a), Müller (2015a), Mułenko, Kozłowska, Bacigálová ao (2014a), Negrean (1995a, 1996a), Negrean, Constantinescu & Denchev (2004a), Negrean (1996b), Negrean & Denchev (2000a), Özaslan, Hüseyin & Erdogdu (2014a), Pellicier (2001a), Petrak (1957a), Ploch, Choi, Rost ao (2010a), Ploch & Thines (2011a), Porta-Puglia & Mifsud (2006a), Redfern & Shirley (2011a), Riethmüller, Voglmayr, Göker, Weiß & Oberwinkler (2002a), Roskam (2009a), Ruszkiewicz-Michalska (2006a), Thines & Spring (2005a), Tomasi (2003a, 2012a, 2014a), Unamuno (1941a, 1942a), Voglmayr & Riethmüller (2006a), Vrandečić, Jurković, Ćosić, Poštić & Bijelić (2011a).