Prof. Van der Wolf with colleagues (2005)* wrote that for "... Clavibacter michiganensis no data on transmission via nematodes are available".
Dr. Osdaghi (2022)** in the most recent review of C. sepedonicus does not mention nematodes as vector.
But, there are some indirect references on nematode importance for Cms, and role of Ditylenchus dipsaci for C. insidiosum is well-known (Hawn, E. J. "Transmission of bacterial wilt of alfalfa by Ditylenchus dipsaci (Kühn)." Nematologica 9.1 (1963): 65-68.)
So, can nematodes be a vector for Clavibacter sepedonicus and C. michiganensis?
*Van der Wolf, J. M., J. G. Elphinstone, D. E. Stead, M. Metzler, P. Müller, A. Hukkanen, and R. Karjalainen. Epidemiology of Clavibacter michiganensis subsp. sepedonicus in relation to control of bacterial ring rot. No. 95. PRI Bioscience, 2005.
**Osdaghi, Ebrahim, et al. "Bacterial ring rot of potato caused by Clavibacter sepedonicus: A successful example of defeating the enemy under international regulations." Molecular Plant Pathology 23.7 (2022): 911-932.
9 years ago, Alexander Ryss https://www.researchgate.net/profile/Alexander-Ryss
answered the similar question:
https://www.researchgate.net/post/Can_Clavibacter_michiganensis_subsp_sepedonicus_be_transmitted_by_nematodes
"Synergism of Clavibacter michiganensis subsp. michiganensis and the root knot nematode Meloidogyne incognita: see in:
Moura, R.M. de, Enchandi, E. and Powell, N.T. (1975) Interactions of Corynebacterium michiganense and Meloidogyne incognita on tomato. Phytopathology 65, 1332–1335.
(Citation after: KARSSEN G. , WIM WESEMAEL W. Moens M. 2013. Root-knot Nematodes. In: CAB International 2013. Plant Nematology, 2nd edn (eds R. Perry and M. Moens)"
Is there any new information?
Yes, nematodes can act as vectors for certain bacterial pathogens, including Clavibacter sepedonicus and Clavibacter michiganensis. These bacterial pathogens are responsible for causing serious diseases in plants.
Clavibacter sepedonicus is the causal agent of bacterial ring rot disease in potato plants. It can be transmitted through infected seed tubers, contaminated equipment, and possibly by nematodes, particularly the stubby root nematode (Trichodorus spp.).
Clavibacter michiganensis encompasses several subspecies, each causing distinct diseases. For example, Clavibacter michiganensis subsp. sepedonicus causes bacterial wilt and canker in tomato plants. Nematodes, such as the root-knot nematodes (Meloidogyne spp.), have been investigated as potential vectors for some subspecies of Clavibacter michiganensis.
It's important to note that while nematodes can potentially act as vectors for these bacteria, the exact mechanisms of transmission and the significance of nematodes in the spread of these pathogens may vary based on the specific pathogen, nematode species, and host plants involved. Proper plant disease management practices, including nematode control and sanitation measures, are essential to prevent the spread of these bacterial pathogens and the diseases they cause.
Lalit Pandurang Patil Please, can you give the references for your statements?
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