Rhodococcus and Agrobacterium

Learn more about the diseases caused by these two bacteria

The purpose of these pages is to provide information on our investigations into the diseases caused by these two bacteria.

Please send comments and questions to Melodie Putnam.


  • OSU Plant Clinic hosts and cultivars that tested positive for crown gall (Agrobacterium sp.) | View PDF
  • Images of symptoms caused by Rhodococcus fascians on different hosts | View gallery
  • Images of crown gall on different hosts | View gallery
  • Naturally occurring hosts of Rhodococcus fascians | View PDF
  • Artificially inoculated hosts of Rhodococcus fascians | View PDF
  • Leafy galls and Rhodococcus | View PDF
  • Demystifying Rhodococcus fascians (Digger, February 2014) | View PDF
  • The Lowdown on Leafy Gall | View GrowerTalsk article

Scientific papers and presentations

  • The importance of Location, Location, Location: As True for Rhodococcus fascians as for Real Estate | View poster
  • The use of Pseudomonas fluorescens A506 and Agrobacterium radiobacter K1026 for management of crown gall in herbaceous perennials | View poster
  • PCR detection of pathogenic Rhodococcus fascians and Agrobacterium tumefaciens on herbaceous perennials | View poster
  • Pathogenicity testing of Agrobacterium tumefaciens and Rhodococcus fascians isolates on micropropagated plants | View poster
  • Loop-mediated isothermal amplification (LAMP) for rapid detection of Rhodococcus fascians on ornamentals | View poster
  • Use of loop-mediated isothermal amplification (LAMP) as a diagnostic tool in a university plant diagnostic laboratory | View poster