Brassica napus
rapeseed
10 Related Pests
Tomato black ring virus
virus
Lettuce Ringspot Virus, Bean Ringspot Virus, Beet Ringspot Virus, Celery Yellow Vein Virus, Lettuce Ringspot Virus,Potato Bouquet Virus, Potato Pseudo-Aucuba Virus,Tomato Black Ring Nepovirus
India, Japan, Turkey, throughout Europe
Not known to occur
China, Korea, Mexico, Thailand
2022-11-03 18:40:04
Wide host range reported. Requires the Dagger nematode to transmit this virus
Wide host range, however many are experimental only. Important crops listed below.
No
RICH ISTA,
No references found indicating seed is a pathway.
RICH ISTA,
Richardson, MJ. 1990. An Annotated List of Seedborne Diseases. International Seed Testing Association, Zurich Switzerland.
Candidatus phytoplasma asteris
phytoplasma
Worldwide
Widespread
2021-11-15 19:27:42
AY phytoplasmas are not seed transmissable and seed is not a pathway in any host.
Wide host range, primarily herbaceous dicots, though strains infect monocots and woody ornamentals
No
PHY01-1,PHY01-2
Seed is not a pathway for AY phytoplasmas
PHY01-1,PHY01-2
Alternaria brassicola
fungus
Helminthosporium brassicicola, Alternaria brassicae var. minor, Sporidesmium exitiosum f. luxuriosum, Alternaria circinans, Alternaria oleracea,Helminthosporium brassicae, Macrosporium circinans, Macrosporium commune var. circinans, Polydesmus exitiosus f. alternarioides, Polydesmus exitiosus f. luxuriosum, Alternaria brassicae f. microspora, Macrosporium cheiranthi var. circinans, Sporidesmium exitiosum f. alternarioides, Sporidesmium septorioides
Worldwide
Widespread
Mexico
2021-08-26 16:22:45
Mexico Organic Vegetable List
crucifers
Yes
ALTEBI-1,ALTEBI-2,ALTEBI-3,
Seed as a pathway is well documented and accepted.
Blotter or culture plating (ISTA)
ALTEBI-1,ALTEBI-2,ALTEBI-3,
Blotter, Seed wash, Culture plating, Agar plating, PCR
ALTEBI-4,ALTEBI-5,ALTEBI-6,
ISTA describes both blotter and culture plating as standard methods
Hot water soak, Iprodione, Metalaxyl, Rovral
ALTEBI-1,
IPM programs including crop rotation, sanitation and cultural practices suggested
Alternaria brassicola In: Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc."
Humpherson-Jones FM, Maude RB, 1982. Studies on the epidemiology of Alternaria brassicicola in Brassica oleracea seed production crops. Annals of Applied Biology, 100:61-71
Humpherson-Jones FM, Hocart MJ, Ainsworth LF, 1983. Alternaria disease of brassica seed crops. 33rd Annual Report for 1982, National Vegetable Research Station Wellesbourne, Warwick UK, 63-64
Bassey and Gabrielson, 1983. Factors affecting accuracy of 2,4-D assays of crucifer seed for Alternaria brassicicola and relation of assays to seedling disease potential. Seed Sci. and Technol. 11:411-420
Wu WS, Chen TW, 1999. Development of a new semiselective medium for detecting Alternaria brassicicola in cruciferous weeds. Seed Science and Technology, 27:397-409
International Seed Testing Assoaciation, 1965. Cabbage etc, Dark leaf spot, wirestem. Proceedings of the International Seed Testing Association, 30:1103.
Leptosphaeria maculans
fungus
Phoma brassicae, Phoma lingam, Phoma
oleracea, Phoma napobrassicae, Phyllosticta brassicae, Phyllosticta napi Sacc., Plenodomus lingam,
Pleospora maculans, Sphaeria lingam, Sphaeria
maculans
Worldwide
Widespread
China, Korea
2022-03-22 18:18:43
Seed transmission of this pathogen is well established and accepted by the seed industry. This pathogen has been reported in China and Korea (ARS GRIN)
Restricted to Brassicaceae
Yes
LEPTMA-1,
Seed transmission of this pathogen is well established and accepted by the seed industry
Blotter paper is the standard method of the NSHS
LEPTMA-1,
Blotter paper
LEPYMA-4,LEPYMA-5,
This test has been validated by the ISTA and NSHS
Yes, The most effective product now is Coronet by BSAF. Mertect and Iprodione
ISF RPLD,
The most effective products on the market are Coronet. Mertect and Iprodione. (Seed treatment information from manufacture labels and seed industry practices.)
Leptosphaeria maculans In: Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
Seed Health Testing Method for Phoma lingum Br 2.1 National Seed Health System. http://www.seedhealth.org
Detection of Leptosphaeria maculans in Brassica sp. Seed. 2016 International Seed Testing Association. Seed Health Test Methods 2016. www.seedtest.org
International Seed Federation Regulated Pest List Database. pestlist.worldseed.org Nyon Switzerland
Verticillium dahliae
fungus
Verticillium ovatum, Verticillium trachiephilum
Worldwide
Widespread
China
2022-11-11 18:36:13
Prevalent in China
Wide host range (ornamentals, vegetables, agronomic). Isolated from some small grains but not pathogenic on small grains
No
VERTDA-10,VERTDA-16,
Pathway not proven. Only one reference found indicating seed may be a pathway but only 1 sample of 74 seed samples tested was found with external Verticillium dahliae. No other references found.
VERTDA-10,VERTDA-16,
Heppner C, Heitefuss R, 1995. Investigations on the occurrence of Verticillium dahliae Kleb. and other fungi on seeds of oilseed rape (Brassica napus L. var. oleifera Metzger). Nachrichtenblatt des Deutschen Pflanzenschutzdienstes, 47:57-61
Richardson, MJ. 1990. An Annotated List of Seedborne Diseases. International Seed Testing Association. Zurich, Switzerland.
Mycosphaerella brassicicola
fungus
Asteroma brassicae, Asteromella brassicae, Cercospora albomaculans, Dothidea brassicae, Phyllosticta brassicicola, Phyllosticta napi, Pseudocercosporella anguioides, Sphaerella brassicicola, Sphaeria brassicicola., Depazea brassicicola
Worldwide
AL,CA, HI, IL, OR, NY, TX, WA
Mexico
2022-04-13 18:04:27
Brassicaceae
No
No references found indicating that seed is a pathway. Crop debris is the most common source of inoculum. Plant debris associated with the seed may carry fungal spores.
Fusarium redolens
fungus
Fusarium oxysporum var. redolens
China, Japan, Turkey, New Zealand, Czech Republic, Finland
Not known to occur
Korea
2021-04-07 16:27:34
No references found indicating seed is a pathway.
An economic pathogen of carnation. Though reported on other vegetable and grain crops, it is not considered an economic pathogen of many hosts or its economic importance is not known. Only hosts with peer reviewed publications are listed below. Other crops often listed in various countries harmful pest lists or inventories without evidence presented.
No
No references found indicating that seed is a pathway.
Beet western yellows virus
virus
Brassica virus 5, Malva yellows virus, Radish yellows virus, Turnip mild yellows virus, Turnip yellows virus
Worldwide
CA, OR, WA
Korea
2021-04-01 18:43:54
Primarily in CA, OR, WA, but probably widespread. Luteovirus, phloem limited viruses are not typically seed transmitted.
Wide host range. Important crop species listed below
No
BWYV00-1,DVP WEB,
Seed is not known to be a pathway in any host of Beet western yellow virus.
BWYV00-1,DVP WEB,
Pratylenchus fallax
nematode
Turkey, Canada
WI, ND
Korea
2022-06-28 17:59:11
Seed is not known to be a pathway for Pratylenchus spp. Pratylenchus spp. primarily move passively through the soil water matrix.
watermelon, beet, wheat, barley, soybean, rapeseed
No
No references found indicating seed is a pathway. Seed is not known to be a pathway for Pratylenchus spp.
Alternaria japonica
fungus
Alternaria raphani. Alternaria brassicae var. macrospora,Alternaria matthiolae
Worldwide
Widespread
Korea
2021-03-29 16:26:13
Korea lists this pathogen as Alternaria spp. This pathogen has been reported in Korea.
brassicas, radish, 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)
ALTERP-2,ALTERP-5,ALTERP-6,
Blotter incubation, culture plating
ALTERP-1,
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.
Seed treatments
ALTERP-1,ALTERP-5,
Chemical, Physical (hot water) and biological seed dressings have been described and are successful in controlling seed inoculum.
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.
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