Bremia lactucae Regel, 1843

on Asteraceae

Bremia lactucae on Crepis capillaris

Crepis capillaris, Belgium, prov.Antwerp, Balen, Griesbroek © Carina Van Steenwinkel

Bremia lactucae on Crepis capillaris

infected leaf, upperside

Bremia lactucae on Crepis capillaris

onderzijde

Bremia lactucae: conidiophores

ultimate branchings of the conidoophore

Bremia lactucae: conidia

conidia

Bremia lactucae on Cirsium oleraceum

Cirsium oleraceum, Belgium, prov. Antwerp, Mol, de Maat © Carina Van Steenwinkel

Bremia lactucae: conidiophore

conidiophore (congo red staining)

Bremia lactucae: conidiophore

detail

gall

Yellowish spots on the upperside of the leaves, corresponding with a thin whitish hypophyllous fungal bloom at the underside, consisting of erect, apically multiple branched conidiophores. Each ultimate branch ends in a swelling with four short stalks, each one bearing an almost globular conidium.

hostplants

Asteraceae, broadly oligophagous

Amberboa moschata; Ammobium alatum; Andryala integrifolia; Aposeris foetida; Arctium lappa, minus, tomentosum; Arctotheca calendula; Arctotis perfoliata; Callistephus chinensis; Carduus acanthoides, crispsus, defloratus, nutans & subsp. leiophyllus, personata; Carlina acaulis, vulgaris; Carthamus tinctorius; Chrysanthemum; Cichorium endivia, intybus; Coreopsis grandiflora; Cotula barbata, turbinata; Crepis biennis, capillaris, conyzifolia, mollis, paludosa, praemorsa, pulchra, pyrenaica, sancta, tectorum, vesicaria subsp. taraxacifolia; Cyanus montanus, segetum; Cynara cardunculus, scolymus; Dimorphotheca pluvialis, sinuata; Echinops sphaerocephalus; Gaillardia amblyodon, aristata, x grandiflora, pulchella; Gazania; Helichrysum macranthum; Hieracium lachenalii, murorum, sabaudum, umbellatum; Hypochaeris glabra; Ismelia carinata; Lactuca alpina, perennis, quercina, sativa, serriola, virosa; Leontodon hispidus & subsp. hastilis, saxatilis; Ligularia sibirica; Monoculus hyoseroides; Moscharia pinnatifida; Mycelis muralis; Onopordum acanthium; Osteospermum ecklonis; Pericallis hybrida; Pilosella aurantiaca, cymosa, piloselloides, ziziana; Polycalymma stuartii; Rhagadiolus stellatus; Rhaponticum scariosum; Rhodanthe manglesii; Scorzoneroides autumnalis, helvetica;Solidago virgaurea; Tanacetum vulgare; Tephroseris; Xanthium; Xeranthemum; Xerochrysum bracteatum.

references

Blumer (1946a), Buhr (1964b), Choi & Thines (2015a), Doppelbaur (1973a), Doppelbaur, Huber & Poelt (1965a), Ellis & Elis (1997a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), Göker, Voglmayr, Riethmüller, Weiß & Oberwinkler (2003a), Hafelner (198a), Jage, Klenke, Kruse ao (2016a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a), Losa España (1942a, 1944a), Melgarejo Nárdiz, García-Jiménez, Jordá Gutiérrez ao (2010a), Müller (2015a), Müller & Kokeš (2008a), Mułenko, Kozłowska, Bacigálová ao (2014a), Mułenko, Sałata & Wołczańska (1995a), Negrean (1995a, 1996b), Negrean, Constantinescu & Denchev (2004a), Riethmüller, Voglmayr, Göker, Weiß & Oberwinkler (2002a), Ruszkiewicz-Michalska (2006a), Scheuer & Bechter (2012a), Thines, Runge, Telle & Voglmayr (2010a), Voglmayr & Constantinescu (2008).

25/05/2017

pub 25.v.2017 · mod 13.viii.2017