Crown gall | Dahlia

HOST:Dahlia

HOST (LATIN):Dahlia sp.

PATHOGEN:Agrobacterium tumefaciens

SYNONYM:Rhizobium sp.

SOURCE:M. Shurtleff

Crown gall of dahlia tubers. Note brownish, rough-surfaced galls, one of which shows rot. Galls often are infected by microorganisms that cause rot.