Plant Parasites of Europe

leafminers, galls and fungi

Agrobacterium tumefaciens

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

on woody plants

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.


This bacterium transfers a part of its own DNA to the genome of the host plant, causing galls especially around the root crown.


Bellmann (2012a), Blanes-Dalmau, Caballero-López & Pujade-Villar (2017a), Buhr (1964b), Caballo-Ponce, Murillo, Martínez-Gil, ao (2017a), 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).

Last modified 21.ii.2023