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Phoma glomerata (blight grapevine )
Phoma glomerata
blight grapevine
Aposphaeria fibricola, Coniothyrium glomerata, Phoma alternariacearum, Phoma fibricola
Africa: South Africa; Asia: China, India, Syria; Europe: Greece, Hungary, Italy, Poland, Russia; Oceania: Australia; South America: Brazil.
Not known to occur.
2025-12-26
fungus
China
Primarily a pathogen of grapevine, pines, peach, and a few ornamentals.
PHOMGL
Phoma glomerata is a widely distributed, opportunistic fungal species commonly associated with leaf spots, stem lesions, and rots. While ARS GRIN lists over 160 plant species from which it has been isolated, the fungus is generally considered a weak pathogen that often occurs in association with other diseases rather than causing major primary infections. Strains reported from wheat in North Dakota (e.g., PHOMGL-3) show some variation from type strains, suggesting intraspecific diversity. Overall, P. glomerata is best characterized as a saprophytic fungus that persists on plant debris and stressed tissue.
Crops
Triticum aestivum
wheat
No
PHOMGL-2, PHOMGL-3, PHOMGL-7, CABI CPC, ARS GRIN
Phoma glomerata is primarily considered an endophyte on wheat, colonizing plant tissues without causing immediate symptoms. Disease development requires prolonged leaf wetness, indicating that infection is opportunistic and environmentally driven. However, one report noted the presence of a possible P. glomerata on wheat seed; no data were provided demonstrating seed transmission or any effect on seed health. Overall, the fungus is not regarded as a seedborne pathogen on wheat, and its epidemiology is linked to foliar colonization and opportunistic growth rather than seed pathways.
2025-12-26 17:15:30
PHOMGL-2
Crous, P.W., Petrini, O., Marais, G.F. et al. 1995. Occurance of Fungal Endophytes in Cultivars of Triticum aesativum in S. Africa. Mycoscience 36: 105.
PHOMGL-3
Hosfer, RM. 1975. Phoma glomerata, a New Pathogen of Wheat and Triticales, Cultivar Resistance Related to Wet Period. Phytopathology 65;1236-1239
PHOMGL-7
JE Machacek, WJ Cherewick, HW Mead, WC Broadfoot. 1951. A study of some seed-borne diseases of cereals in Canada. II. Kinds of fungi and prevalence of disease in cereal seed. Scientific Agriculture 31; 193-206
CABI CPC
Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
ARS GRIN
Farr, DF and Rossman AY 2015. Fungal Databases, Systematic Mycology and Microbiology Laboratory, ARS, USDA. http://nt.ars-grin.gov/fungaldatabases/
Vicia faba
faba bean
uncertain
PHOMGL-4, PHOMGL-5, CABI CPC, ARS GRIN
Phoma glomerata on faba beans has been reported in one or more studies, but seed as a pathway is uncertain: references used artificially inoculated seeds, and no evidence demonstrates natural seed transmission or impact on seed viability. Disease on faba beans is therefore primarily associated with foliar infection from environmental inoculum, not seed.
2025-12-26 17:27:30
PHOMGL-4
Simay, EI, 1997. Pathogenicity of some pycnidial fungi on faba bean seeds. Food and Agricultural Organization of the United Nations.
PHOMGL-5
Simay, EI. 1992. Results of seed tests. III. Occurrence of some pycnidial fungi on faba bean seeds [Vicia faba] Food and Agricultural Organization of the United Nations.
CABI CPC
Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
ARS GRIN
Farr, DF and Rossman AY 2015. Fungal Databases, Systematic Mycology and Microbiology Laboratory, ARS, USDA. http://nt.ars-grin.gov/fungaldatabases/
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