Brassicaceae family
cabbage, broccoli, cauliflower, brussel sprouts, rapeseed, turnip, chinese cabbage, mustard, radish
2 Related Pests
Phymatotrichopsis omnivora
fungus
Hydnum omnivorum, Ozonium auricomum, Ozonium omnivorum, Phymatotrichopsis omnivorum, Phymatotrichum omnivorum
North America: Mexico, USA
AZ, AK, CA, HI, LA, NV, NM, OK, TX, UT
China
2025-08-05
Phymatotrichopsis omnivora is a soil-borne fungus primarily found in warm, alkaline soils, which can lead to sudden plant death and root decay. The pathogen spreads through soil and root contact, survives for years via sclerotia, and is very difficult to manage once established.
Mainly affects cotton but can infect over 2,000 dicot species, causing major losses in crops and ornamentals, while monocots are largely immune.
No
CABI CPC, EPPO, PHMPOM-4
Seed is not considered a pathway for any of its hosts.
CABI CPC, EPPO, PHMPOM-4
Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
OEPP/EPPO Global Database - European and Mediterranean Plant Protection Organization
Uppalapati, S. R., Young, C. A., Marek, S. M., & Mysore, K. S. (2010). Phymatotrichum (cotton) root rot caused by Phymatotrichopsis omnivora: retrospects and prospects. Molecular plant pathology, 11(3), 325-334.
Alternaria alternata
fungus
Alternaria alternata f.sp. fragariae
Alternaria alternata f.sp. lycopersici
Alternaria fasciculata
Alternaria tenuis
Worldwide
AL, CA, FL, GA, IL, IA, LA, MI, MS, NY, OR, PA, SD, TN, TX
Korea
2025-09-08
Alternaria alternata is a widespread fungus that can persist in soil and crop debris for many years, enabling it to infect plants across successive growing seasons. Its spores are dispersed by air, wind, water splash, irrigation, and contact with contaminated plant material. Numerous studies have demonstrated its transmission under experimental conditions, and it has been shown to be seed-transmitted in a few crops within the Malvaceae family.
Main: allium, pepper; Other: watermelon, sunflower, sorghum, spinach, marigold, many fruits and trees
uncertain
ALTEAL-7, CABI CPC, ALTEAL-40, ALTEAL-41
Alternaria alternata has occasionally been found on Brassicaceae, including Brassica oleracea, but these occurrences are considered opportunistic. Evidence is limited, reports are few and mostly based on laboratory detection, and transmission has only been demonstrated artificially, not under natural conditions.
ALTEAL-7, CABI CPC, ALTEAL-40, ALTEAL-41
chemical
Seed treatments are reported to be effective.
Tohyama A and Tsuda, M. 1995. Alternaria on cruciferous plants. 4. Alternaria species on seed of some cruciferous crops and their pathogenicity. Mycoscience 36: 257-26
Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
Kubota, M., Abiko, K., Yanagisawa, Y and Nishi, K. (2006). Frequency of Alternaria brassicicola in commercial cabbage seeds in Japan. Journal of General Plant Pathology 72: 197-204.
Ismail, M., Anwar, S. A., Iqbal, A., Ahmad, N., & Arain, M. A. (2012). Seed-borne fungi associated with cauliflower seeds and their role in seed germination. Pakistan Journal of Phytopathology (Pakistan), 24(1).
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