Alternaria japonica
black spot of radish
Alternaria raphani. Alternaria brassicae var. macrospora,Alternaria matthiolae
Worldwide
Widespread
2021-03-29
fungus
Korea
brassicas, radish, rapeseed
ALTERP
Korea lists this pathogen as Alternaria spp. This pathogen has been reported in Korea.
5 Known Hosts
Brassica oleracea vars.
broccoli, brussel sprouts, cabbage, cauliflower
Yes
ALTERP-3,ALTERP-5,ALTERP-7,ALTERP-2
Though more common in rapeseed and radish, seed as a pathway has been established and accepted.
Yes
Blotter incubation, culture plating
CABI describes the above methods for this pathogen, though these methods were primarily used on radish and chinese cabbage. Commercial testing is available though none of these methods have been standardized or validated.
ALTERP-1
Seed treatments
Chemical, Physical (hot water) and biological seed dressings have been described and are successful in controlling seed inoculum.
ALTERP-1,ALTERP-5
International Seed Federation Regulated Pest List Database. www.pestlist.worldseed.org. Nyon, switzerland
Saharan GS, Mehta N and Meena PD. 2016. Alternaria Diseases of Crucifers: Biology, Ecology and Disease Management. Springer Science+Business Media Singapore Pte Ltd. is part of Springer Science+Business Media (www.springer.com)
Holtzhausen MA and Knox-Davies PS, 1974. Pathogens of cruciferous vegetable crops in commercial seed samples in South Africa. Phytophylactica, 6:289-294
Farr, D.F., and Rossman, A.Y. Fungal Databases, Systematic Mycology and Microbiology Laboratory, ARS, USDA. 2020, http://nt.ars-grin.gov/fungaldatabases/
Alternaria japonica. In: Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
Raphanus sativus
radish
Yes
ALTERP-2,ALTERP-5,ALTERP-7
Seed as a pathway is established and accepted.
Yes
Blotter incubation, culture plating
CABI describes the above methods for this pathogen, though these methods were primarily used on radish and chinese cabbage. Commercial testing is available though none of these methods have been standardized or validated.
ALTERP-1
Seed treatments
Chemical, Physical (hot water) and biological seed dressings have been described and are successful in controlling seed inoculum.
ALTERP-1,ALTERP-5
Farr, D.F., and Rossman, A.Y. Fungal Databases, Systematic Mycology and Microbiology Laboratory, ARS, USDA. 2020, http://nt.ars-grin.gov/fungaldatabases/
Saharan GS, Mehta N and Meena PD. 2016. Alternaria Diseases of Crucifers: Biology, Ecology and Disease Management. Springer Science+Business Media Singapore Pte Ltd. is part of Springer Science+Business Media (www.springer.com)
Holtzhausen MA and Knox-Davies PS, 1974. Pathogens of cruciferous vegetable crops in commercial seed samples in South Africa. Phytophylactica, 6:289-294
Alternaria japonica. In: Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
Brassica napus
rapeseed
Yes
ALTERP-2,ALTERP-5,ALTERP-6
Seed as a pathway has been established but it seems less common than in radish. There was no correlation between seed infestations and seedling stands (Petrie, 1974)
Yes
Blotter incubation, culture plating
CABI describes the above methods for this pathogen, though these methods were primarily used on radish and chinese cabbage. Commercial testing is available though none of these methods have been standardized or validated.
ALTERP-1
Seed treatments
Chemical, Physical (hot water) and biological seed dressings have been described and are successful in controlling seed inoculum.
ALTERP-1,ALTERP-5
Farr, D.F., and Rossman, A.Y. Fungal Databases, Systematic Mycology and Microbiology Laboratory, ARS, USDA. 2020, http://nt.ars-grin.gov/fungaldatabases/
Saharan GS, Mehta N and Meena PD. 2016. Alternaria Diseases of Crucifers: Biology, Ecology and Disease Management. Springer Science+Business Media Singapore Pte Ltd. is part of Springer Science+Business Media (www.springer.com)
Petrie GA, 1974. Fungi associated with seeds of rape, turnip rape, flax, and safflower in western Canada, 1968-73. Canadian Plant Disease Survey, 54:155-165
Alternaria japonica. In: Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
Brassica rapa
turnip, chinese cabbage
Yes
ALTERP-2,ALTERP-5,ALTERP-6
Seed as a pathway is established and accepted.
Yes
Blotter incubation, culture plating
CABI describes the above methods for this pathogen, though these methods were primarily used on radish and chinese cabbage. Commercial testing is available though none of these methods have been standardized or validated.
ALTERP-1
Seed treatments
Chemical, Physical (hot water) and biological seed dressings have been described and are successful in controlling seed inoculum.
ALTERP-1,ALTERP-5
Farr, D.F., and Rossman, A.Y. Fungal Databases, Systematic Mycology and Microbiology Laboratory, ARS, USDA. 2020, http://nt.ars-grin.gov/fungaldatabases/
Saharan GS, Mehta N and Meena PD. 2016. Alternaria Diseases of Crucifers: Biology, Ecology and Disease Management. Springer Science+Business Media Singapore Pte Ltd. is part of Springer Science+Business Media (www.springer.com)
Petrie GA, 1974. Fungi associated with seeds of rape, turnip rape, flax, and safflower in western Canada, 1968-73. Canadian Plant Disease Survey, 54:155-165
Alternaria japonica. In: Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
Solanum lycopersicum
tomato
No
ALTERP-3,ALTERP-4
Not a host. Though CABI (2020) lists tomato as a possible host and cites Khulbe and Sati (1987) as a reference, but no data was presented and the source of the seed was not given. No other references were found indicating tomato is a natural host for this pathogen.
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