Plasmodiophora brassicae Woronin, 1877

clubroot

on Brassicaceae

Plasmodiophora brassicae: root galls on Brassica oleracea

Brassica oleracea, Nieuwer ter Aa, 16.x.2018 © Arnold Grosscurt: three kohlrabis with galled roots

Plasmodiophora brassicae: root gall on Brassica oleracea

detail of the gall

Plasmodiophora brassicae: root gall on Brassica oleracea

transverse section through the gall

Plasmodiophora brassicae: galls on Brassica oleracea

Brassica oleracea, United States © Robert Wick, University of Massachusetts, Bugwood.org

gall

the root collar and roots are strongly swollen, spindle-shaped; there is no gall chamber.

host plants

Brassicaceae, broadly oligophagous:

Aethionema saxatile; Alliaria petiolata; Alyssoides utriculata; Alyssum alyssoides, desertorum, montanum; Arabidopsis arenosa, suecica, thaliana; Arabis; Armoracia rusticana; Aubrieta columnae, deltoidea, pinardii; Aurinia petraea, saxatilis; Barbarea stricta, verna, vulgaris; Berteroa incana; Biscutella auriculata, didyma, laevigata; Brassica oleracea; Braya alpina; Bunias erucago, orientalis; Calepina irregularis; Camelina; Capsella bursa-pastoris, orientalis, rubella; Cardamine amara, parviflora, pratensis; Cardaria draba; Coclearia anglica, danica, groenlandica, officinalis; Coincya monensis subsp. cheirantho, wrightiis; Conringia orientalis; Crambe abyssinica, maritima, tataria; Descuriania sophia; Diplotaxis erucoides; Draba; Erophila verna; Eruca vesicaria; Erucastrum gallicum, nasturtiifolium; Erysimum cheiranthoides, cheiri, crepidifolium, hieraciifolium, odoratum; Hesperis kotschyana, matronalis, tristis; Hirschfeldia incana; Iberis; Isatis glauca, praecox, tinctoria; Lepidium campestre, coronopus, densiflorum, didymum, ruderale, sativum, viriginium; Lobularia maritima; Lunaria annua, rediviva; Malcolmia africana, flexuosa, maritima, orsiniana subsp. angulifolia; Matthiola incana, longipetala subsp. bicornis, tricuspidata; Myagrum perfoliatum; Nasturtium; Neslia paniculata; Petrocallis pyrenaica; Raphanus raphanistrum & subsp. rostratus, sativus; Rapistrum perenne, rugosum; Rorippa austriaca, islandica, sylvestris; Sinapis alba, arvensis & subsp. allionii; Sisymbrium; Syrenia cana; Thlaspi.

References to Papaver, Reseda and especially Fragaria by Klenke & Scholler need further confirmation.

notes

a pest on cultivated plants: “clubroot”

references

Buhr (1964b), Coulianos & Holmåsen (1991a), Klenke & Scholler (2015a), Redfern & Shirley (2011a), Roskam (2009a

mod 2.vii.2019