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Manual seed cleaning, to remove plant debris, will prevent carry-over of the fungus for farmers who save seeds for the next season. Burying or destroying the remains of a cowpea harvest will reduce the amount of fungus able to infect new crops, as will removing alternative hosts, but these are costly
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begin as small, lighter coloured areas, almost yellow. Later they become bronze to dark grey, roughly circular to more elongated and up to 10 mm across . There will be chlorotic spots on upper surfaces of leaves, masses of spores on lesions which resemble black mats on lower leaf surface, and
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The fungus survives between crops on seed and in crop debris. It may also survive on legume weeds . Transmission is by air-borne spores produced on the underside of the leaf . Both windborne ascospores and conidia are thought to be spreading agents .
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There are resistant cowpea varieties. Resistance has also been found in mung bean varieties . Planting of resistant varieties is so far considered the main and most important method for controlling this disease .
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Ministry of
Agriculture and Rural Affairs of the People's Republic of China. Weekly report of vegetable production of the year. Issue 27, 2014. (全国蔬菜生产信息周报2014年第27期)
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223:. The leaf withers as the spots join together. Leaves then die and fall off . In severe cases, only a few new leaves on the top of the plant are left .
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Boa, E., (2014) Cercospora leaf spot of cowpea. http://africasoilhealth.cabi.org/wpcms/wp-content/uploads/2015/02/38-legumes-cercospora-leaf-spot.pdf
199:. It causes cowpea cercospora leaf spot, one of the most widespread and significant plant diseases in Africa and Asia. A city in China reported a 100%
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Ascospores colourless, 1-septate, upper cell sometimes slightly larger than the lower cell, straight to slightly curved, size at 11-19 × 3-4 μm.
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Cowpea cercospora leaf spot. Website for China agricultural information (中国农业信息网) http://www.agri.cn/kj/syjs/zzjs/201608/t20160812_5237278.htm
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Cowpea
Cercospora leaf spot. Pacific Pests and Pathogens - Fact Sheets. http://www.pestnet.org/fact_sheets/cowpea_cercospora_leaf_spot_303.htm
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in its asexual stage, is a fungal plant pathogen belonging to the group
Ascomycota. It can affect several legume plants, including species of
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If susceptible varieties are grown, and weather conditions occur that experience suggests will result in disease outbreaks, spray with
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Lin, Y., Yang, Z., Guo, Z. (1995). An
Overview for Taiwan Farmers. P188. ISBN：9910000000027(林益昇、楊佐琦、郭章信。1995。台灣農家要覽農作篇(三)，第188頁。葉瑩編。)
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and slightly flexuous conidia have 4 to 9 septa, appearing as smooth, colourless to olivaceous brown, of size 35-155 × 4–4.5 μm.
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necrotic spots on leaves . The leaf spot has a unique grey to dark powdery appearance that can distinct it from
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infection rate on cowpea in 2014. In Africa, an epidemic can cause a yield loss of up to 40% .
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Cercospora cruenta Sacc. 1880. Encyclopedia of Life. https://eol.org/pages/51119821/articles
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Sivanesan, A. (1990). Mycosphaerella cruenta. . IMI Descriptions of Fungi and
Bacteria, (99)
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and time-consuming measures which may not appeal to, or be feasible for, all farmers.
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by planting alternate rows of cowpea and another suitable non-legume crop, such as
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Cowpea. Penn State
University. https://plantvillage.psu.edu/topics/cowpea/infos
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can be taken from the black mats on lower leaf surface of infected leaves. These
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Phaseolus, Vigna, Calopogonium, Lablab niger, Mucuna
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212:Cercospora leaf spots of cowpea
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195:Stizolobium deeringianum
187:Pseudocercosopora cruenta
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172:(Sacc.) Deighton, (1976)
169:Pseudocercospora cruenta
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521:-related article is a
353:Mycosphaerella cruenta
258:Management and control
201:Mycosphaerella cruenta
182:Mycosphaerella cruenta
141:Mycosphaerella cruenta
25:Mycosphaerella cruenta
234:obclavate-cylindrical
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207:Symptoms and signs
162:Cercospora cruenta
99:Mycosphaerellaceae
649:Capnodiales stubs
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519:Capnodiales
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623:Categories
308:References
69:Ascomycota
65:Division:
249:Lifecycle
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49:Eukaryota
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