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Clavibacter michiganensis subsp. insidiosus (bacterial alfalfa wilt )
Clavibacter michiganensis subsp. insidiosus
bacterial alfalfa wilt
Aplanobacter insidiosus, Bacterium insidiosum, Burkholderiella insidiosa, Corynebacterium insidiosum, Corynebacterium michiganense pv. insidiosum, Corynebacterium michiganense subsp. insidiosum, Erwinia insidiosa, Mycobacterium insidiosum, Phytomonas insidiosa
Worldwide
AK,, CA, MD, MN, OK, OR
2022-01-25
bacterium
Sudan, China, Korea
Alfalfa, other forage Fabaceae spps., native and invasive clovers.
CORBIN
Currently absent from many EU countries, Canada and Brazil. Many countries report presence, but no significant disease.
1 Known Hosts
Medicago sativa
alfalfa
Yes
CORBIN-1, CORBIN-2, CORBIN-3
Clavibacter michiganesis pv. insidiosus may be seed borne, but seed transmission under agronomic conditions is rare. Diseased plants generally produce relatively few seeds. The seeds which are produced are of low quality, usually shrunken and shriveled. These seeds are difficult to detect in large seed lots and are usually removed during the seed cleaning process.
Yes
Culture plate, PCR
These tests have not been standardized or validated. Culture plating is used by Canadian Food Inspection System.
CORBIN-4
Resistant varieties are available.
CORBIN-1
CORBIN-1
Clavibacter michiganensis subsp. insidiosus In: Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
CORBIN-2
Cormack MW, Moffatt JE, 1956. Occurrence of the bacterial wilt organism in alfalfa seed. Phytopathology, 46:407-409.
CORBIN-3
Samac, D. A.; Paul, S.; Nix, R. J.; Oleson, A. E. 1998 Transmission frequency of Clavibacter michiganensis subsp. insidiosus to alfalfa seed and identification of the bacterium by PCR. Plant Disease 82:1362-1367
CORBIN-4
Sheppard JW, 1991. Protocol sheet No. 14. Ottawa, Canada: Seed Borne Disease Unit, Central Seed Laboratory, Canadian Food Inspection System.
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