Agrobacterium tumefaciens (Smith & Townsend, 1907) Conn, 1942

on a wide variety of plant species

Agrobacterium tumefaciens: gall on Osteospermum ecklonis

Osteospermum ecklonis, Dronten © Arnold Grosscurt

Agrobacterium tumefaciens on Forsythia x intermedia

Forsythia x intermedia, Dronten © Arnold Grosscurt

Agrobacterium tumefaciens on Crataegus monogyna

Crataegus monogyna, Eerbeek © Arnold Grosscurt

crown gall

Euonymus japonicus, Dronten © Arnold Grosscurt

crown gall


Agrobacterium tumefaciens: gall on Aster novi-belgii

Symphyotrichum novi-belgii, ‘s-Gravenzande; © Jan Scheffers

Agrobacterium tumefaciens on Rubus fruticosus

Rubus fruticosus, Vragenderveen

Agrobacterium tumefaciens: gall on Rubus fruticosus

Rubus fruticosus, Flevoland, Reve-Abbertbos © Hans Jonkman: note how the galled tissue erupts through the bark

Agrobacterium tumefaciens on a gall of Lasiotera rubi

gall, on top of a gall of Lasioptera rubi

Agrobacterium tumefaciens (cf): galls on Cornus sanguinea

Cornus sanguinea, Belgium, prov. Namur, Vierves-sur-Viroin; © Stéphane Claerebout

? Agrobacterium tumefaciens on Ulmus sp.

Ulmus, Dronten © Arnold Grosscurt

Agrobacteriumn tumefaciens (?) gall on Robinia pseudoacacia

Robinia pseudoacacia, Glimmen © Arnold Grosscurt

host plants

strongly polyphagous, including:

Acer; Aesculus; Alnus; Argyranthemum frutescens; Aster; Beta vulgaris; Betula pendula, pubescens; Brassica napus, oleracea; Chamaecyparis lawsoniana; Chrysanthemum indicum; Cornus sanguinea; Crataegus laevigata; Cydonia oblonga; Dahlia pinnata; Daphne mezereum; Datura innoxia, stramonium; Daucus carota; Euonymus; Forsythia; Fraxinus; Gladiolus; Pinus halepensis; Quercus pubescens; Robinia pseudoacacia; Salix; Rubus; Symphyotrichum novi-belgii.

Contrary to almost all gall causers this species is not associated with one more or less closely related group of host plants. Whether in all cases indeed the same causative organism is involved remains to be seen.


Bellmann (2012a), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Buhr (1964b), Coulianos & Holmåsen (1991a), Dauphin & Aniotsbehere (1997a), Ecott (2012a), Grosscurt (2017a), Hellrigl (2010a), Melgarejo Nárdiz, García-Jiménez, Jordá Gutiérrez ao (2010a), Redfern & Shirley (2011a), Roskam (2009a, 2019a), Salas-Remón, Llimona, Lozano ao (2015a), Tomasi (2003a, 2012a, 2014a).

mod 11.xii.2019