Boeremia exigua var. exigua
leaf spot
Ascochyta asteris, Ascochyta cyphomandrae, Ascochyta hydrangeae, Ascochyta nicotianae, Ascochyta phaseolorum, Ascochyta sonchi, Phoma exigua f.sp. exigua, Phoma exigua var. exigua, Phoma herbarum, Phoma herbarum f. brassicae, Phoma herbarum f. hyoscyami, Phoma herbarum f. schoberiae, Phoma herbarum var. dulcamaricola, Phoma linicola, Phoma solanicola, Phoma solanophila, Phoma tuberosa, Phyllosticta decidua, Phyllosticta hortorum, Phyllosticta mulgedii, Phyllosticta sambuci, Phyllosticta vincae-majoris, Phyllosticta vincae-minoris
Worldwide. CABI: B. exigua var. exigua is almost certainly ubiquitous worldwide, but many records fail to specify the variety that it is not possible to provide particular country/state information. There are undoubtedly many records under the many synonyms and these require re-examination.
Widespread
2024-09-04
fungus
Korea
B. exigua var. exigua is a ubiquitous weak or secondary pathogen on more than 200 different plant genera. Main hosts are in the Fabaaceae and Solanaceae familes.
PHOMHE
This pathogen has been reported in Korea under other synonyms. This is a weak pathogen capable of persisting in soil and also transmitted by rainsplash-dispersed conidia. Common bean and possible sugarcane are the only hosts shown where seed may be a pathway.
12 Known Hosts
Phaseolus vulgaris
common bean
Yes
PHOMHE-4,ISF RPLD,RICH ISTA,PHOMHE-6,PHOMHE-7
Reports show seed is a pathway, however; it is not clear how much seed contributes to the epidemiology of the disease.
Yes
Blotter and agar incubation
Tests have not been standardized or validated
PHOMHE-4,ISF RPLD
Cultural, Chemical
Suggested management strategies suggest using resistant varieties, crop rotation, field inspections, wide plant spacing, clean seed planting, seed treatment, and foliar fungicide application.
ISF RPLD,PHOMHE-7
Yesuf M and Sangchote S. 2005. Occurrence and distribution of major seedborne fungi associated with Phaseolus bean seeds in Ethiopia. Kasetsart Journal, Natural Sciences, 39:216-225.
International Seed Federation Regulated Pest List Database. pestlist.worldseed.org Nyon Switzerland
Richardson, MJ. 1990. An Annotated List of Seedborne Diseases. International Seed Testing Association, Zurich Switzerland.
Boerema, G.H., Crueger, G., Gerlagh, M. and Nirenberg, H. (1981). Phoma exigua var. diversispora and related fungi on Phaseolus beans. Journal of Plant Diseases and Protection 88(10):597-607.
Koder, S. B., Nawale, R., Katyayani, K. K. S., Rana, M., & Srivastava, S. (2022). Symptoms, biology and management of ascochyta blight (Phoma exigua) of French beans: A review. Agricultural Science Digest-A Research Journal, 42(6), 657-664.
Cucurbita spp.
squash, pumplin, gourd
No
CABI CPC,RICH ISTA
No references found indicating seed is a pathway. A weak pathogen but widespread in soils throughout the world.
Glycine max
soybean
No
CABI CPC,RICH ISTA
No references found indicating seed is a pathway. A weak pathogen but widespread in soils throughout the world.
Gossypium spp.
cotton
No
CABI CPC,RICH ISTA
No references found indicating seed is a pathway. A weak pathogen but widespread in soils throughout the world.
Solanum lycopersicum
tomato
No
CABI CPC,RICH ISTA
No references found indicating seed is a pathway. A weak pathogen but widespread in soils throughout the world.
Capsicum annuum
pepper
No
CABI CPC,RICH ISTA
No references found indicating seed is a pathway. A weak pathogen but widespread in soils throughout the world.
Pisum sativum
pea
No
CABI CPC,RICH ISTA
No references found indicating seed is a pathway. A weak pathogen but widespread in soils throughout the world.
Cucumis sativus
cucumber
No
CABI CPC,RICH ISTA
No references found indicating seed is a pathway. A weak pathogen but widespread in soils throughout the world.
Cucumis melo
melon
No
CABI CPC,RICH ISTA
No references found indicating seed is a pathway. A weak pathogen but widespread in soils throughout the world.
Hordeum vulgare
barley
No
CABI CPC,RICH ISTA
No references found indicating seed is a pathway. A weak pathogen but widespread in soils throughout the world.
Triticum aestivum
wheat
No
CABI CPC,RICH ISTA
No references found indicating seed is a pathway. A weak pathogen but widespread in soils throughout the world.
Solanum melongena
eggplant
No
CABI CPC,ISF RPLD,RICH ISTA
No references found indicating seed is a pathway. A weak pathogen but widespread in soils throughout the world.
Crop Protection Compendium. Wallingford, UK: CAB International. www.cabi.org/cpc.
International Seed Federation Regulated Pest List Database. pestlist.worldseed.org Nyon Switzerland
Richardson, MJ. 1990. An Annotated List of Seedborne Diseases. International Seed Testing Association, Zurich Switzerland.
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