CROWN GALL
|
Dahlia

SOURCE:
M. Shurtleff
DISEASE:
Crown gall
HOST:
Dahlia
(Dahlia sp.)
Crown gall of dahlia tubers. Note brownish, rough-surfaced galls, one of which shows rot. Galls often are infected by microorganisms that cause rot.
PATHOGEN:
Agrobacterium tumefaciens
PATHOGEN SYNONYM:
Rhizobium sp.