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Alternaria dauci (leaf blight of carrot )
Alternaria dauci
leaf blight of carrot
Alternaria brassicae var. dauci, Alternaria porri f.sp. dauci, Alternaria carotae, Macrosporium dauci, Macrosporum carotae, Polydesmus exitiosus var. dauci, Sporidesmium exitiosum var. dauci
Worldwide
Widespread
2021-08-26
fungus
Mexico
The main host of Alternaria dauci. is carrot. Other umbielliferous crops are susceptible in nature, celery, parsley, parsnip. Other crops, cabbage, tomato, lettuce, radish and cucumber, were attacked in laboratory studies, but not considered natural hosts.
ALTEDA
This pathogen is not quaranted anywhere in the world (ALTEDA-1). This pathogen has been reported in MX.
4 Known Hosts
Apium graveolens
celery
No
No references found indicating seed is a pathway in celery
Coriandrum sativum
coriander
Yes
ALTEDA-5
This reference established coriander seed as a potential pathway, though not common
Yes
Seed examination
This method has not been validated. Test methods for carrot seed are commonly applied to coriander seed.
ALTEDA-5
Thiram and Iprodione
ALTEDA-5
ALTEDA-5
Reis, et. al. 2006. Association of Alternaria dauci and A. alternatawith coriander seeds and efficiency of chemical treatments. Horticultura Brasilia 24;107-111.
Daucus carota
carrot
Yes
ALTEDA-1, ALTEDA-2, ALTEDA-4, ALTEDA-7
Seed transmission of this pathogen on carrot is well established and accepted.
Yes
Blotter incubation
This test has been validated by the ISTA and the NSHS
Blotter incubation is the NSHS Standard Method.
ALTEDA-6, ALTEDA-7, ISTA
Thiram soak, Thiram and Iprodione
ALTEDA-1, ALTEDA-2
ALTEDA-1
Alternaria dauci In: Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
ALTEDA-2
Strandberg, JO. 1984. Efficacy of fungicides on persistance of Alternaria dauci on carrot seed. Plant Disease 68:39-42
ALTEDA-4
Strandberg, JO. 1988. Detection of Alternaria dauci on carrot seed. Plant Disease 72;531-534
ALTEDA-7
International Seed Federation Regulated Pest List Database. www.pestlist.worldseed.org. Nyon, Switzerland
ALTEDA-6
Seed Health Testing Method for Alternaria dauci Rb 2.1 National Seed Health System. http://www.seedhealth.org
ISTA
International Rules for Seed Testing. International Seed Testing Association; www.seedtest.org
Petroselinum crispum
parsley
No
No references found indicating seed is a pathway in parsley
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