Assessment and Distribution of Foliar and Soil-Borne Diseases of Capsicum Species in Ethiopia

Tajudin A. Mohammed, Alemayehu H. Welderufael, Bayoush B. Yeshinigus


Diseases caused by fungi and oomycetes lead to reduced productivity of pepper (Capsicum spp.) in Ethiopia. Currently, knowledge about severity and geographical distribution of fungal diseases in pepper producing areas is limited. Thus this study was aimed: to map the geographical distribution of economically relevant Capsicum diseases and to identify, document, prioritize, and update the status of fungal infectious diseases across the country. A survey was conducted throughout major pepper agro-ecological zones in Ethiopia for two consecutive years, 2018 and 2019/20. Districts were surveyed based on pepper production at intervals of 4 to 10 kilometers from each sampling zone of major pepper growing areas. Global positioning system (GPS) was used to mark each sampling point using a GPS receiver for altitude and coordinates. Nine major pathogenic fungi were identified in samples collected from different pepper-producing areas across the country.  Cercospora leaf spot caused by Cercospora capsici was found prevalent in 39.8% of the 133 fields studied, followed by Fusarium wilt caused by Fusarium oxysporum f. sp. capsici, and Phytophthora collar, root, and fruit rot caused by Phytophthora capsici, prevalent in 21.1% and 15.8% fields, respectively. The maximum overall mean percent severity index (69.5%) was recorded for Fusarium stem and root rot (Fusarium solani) followed by damping-off (56.7%) and Fusarium wilt (55.4%). The current study indicated the importance of fungal diseases, particularly soil-borne diseases. The molecular characterizations, primers development for important pathogens, and genome-wide screening of Capsicum genotypes in Ethiopia required to advance environmentally safe and affordable disease control methods.


Fungal diseases; Soil borne diseases; foliar diseases; Pepper; Phytophthora capsici


AARC. 2019. Progress Report 2018/2019. Ambo Agricultural Research Centre, Plant Protection Research Division, Department of Plant Pathology.

Abebe, A. and M. Abera. 2019. Pepper disease assessment and identification in major growing districts of west Gojam zone in Northwestern Ethiopia. International Journal of Sustainable Agricultural Research, 6: 8-20.

Adedire, O. M., A. Pitan, A. O. Farinu and W. F. Ogundipe. 2019. The biocontrol of soil transmitted Cercospora capsici with Lactobacillus plantarum. Journal of Advances in Microbiology, 18: 1-8.

Agrios, G. N. 2005. Plant Pathology. Academic Press: New York, USA.

Anjos, I. V. d., S. S. d. Melo, T. A. S. Gilio, J. P. Kreitlow, S. M. A. d. S. Neves, K. L. Araújo, M. E. Serafim and L. G. Neves. 2019. Molecular characterization of isolates of Fusarium spp. associated with wilt in Capsicum spp. Journal of Agricultural Science, 11: 519-27.

Arnold, A. E., L. C. Mejia, D. Kyllo, E. I. Rojas, Z. Maynard, N. Robbins and E. A. Herre. 2003. Fungal endophytes limit pathogen damage in a tropical tree Proceedings of the National Academy of Sciences. pp. 15649-54.

Assefa, M., W. Dawit, A. Lencho and T. Hunduma. 2015. Assessment of wilt intensity and identification of causal fungal and bacterial pathogens on hot pepper (Capsicum annuum L.) in Bako Tibbe and Nonno districts of West Shewa zone, Ethiopia. International Journal of Phytopathology, 4: 21-28.

Babadoost, M. 2004. Phytophthora blight: A serious threat to cucurbit industriesAmerican Phytopathological Society. St. Paul, MN, USA.

Babadoost, M. and S. Z. Islam. 2003. Fungicide seed treatment effects on seedling damping-off of pumpkin caused by Phytophthora capsici. Plant disease, 87: 63-68.

Baker, K. F. and B. E. J. Wheeler. 1970. An Introduction to plant diseases. Mycologia, 62: 617-19.

BARC. 2000. Progress Report 1999/2000. Bako Agricultural Research Centre, Crop Protection Research Division.

Barnett, H. L. and B. B. Hunter. 1972. Illustrated Genera of Imperfect Fungi. Burgess Publishing Company: Minneapolis.

Bosland, P. W., E. Votava, J. and E. M. Votava. 2012. Peppers: Vegetable and Spice Capsicums. CAB International: London, UK.

CSA. 2020. Agricultural sample survey 2019/2020 (2012 E.C.): Report on area and production of major crops (Private peasant holdings, Meher season). Central Statistical Agency. Federal Democratic Republic of Ethiopia.

Dessie, A. B., T. M. Abate, T. M. Mekie and Y. M. Liyew. 2019. Crop diversification analysis on red pepper dominated smallholder farming system: Evidence from northwest Ethiopia. Ecological Processes, 8: 1-11.

FAO. 2019. FAO Production Year Book. Food and Agriculture Organization of the United Nations. Rome, Italy.

Gabrekiristos, E. and T. Demiyo. 2020. Hot pepper fusarium wilt (Fusarium oxysporum f. sp. capsici): Epidemics, characteristic features and management options. Journal of Agricultural Science, 12: 347-56.

Hausbeck, M. K. and K. H. Lamour. 2004. Phytophthora capsici on vegetable crops: Research progress and management challenges. Plant disease, 88: 1292-303.

Herman, R. and R. Perl-Treves. 2007. Characterization and inheritance of a new source of resistance to Fusarium oxysporum f. sp. melonis Race 1.2 in Cucumis melo. Plant disease, 91: 1180-86.

Ismail, M. A., A. Moubasher, A. M. El-Eraky, A. H. El-Shaer and H. A. Gouda. 2017. Virulence of wilt pathogens against pepper cultivars in Egypt. International Journal of Technical Research & Science, 1: 304-14.

Karimi, E., E. Oskoueian, R. Hendra and H. Z. E. Jaafar. 2010. Evaluation of Crocus sativus L. stigma phenolic and flavonoid compounds and its antioxidant activity. Molecules, 15: 6244-56.

Kebede, M. and A. Gidesa. 2016. Survey and identification of diseases on major crops of Assosa and Kamashi zones, Ethiopia. Galore International Journal of Applied Sciences and Humanities, 1: 27-31.

Korobkon, A., T. Tegegn and C. Dilbo. 1985. Chemical control of bacterial leaf spot of hot pepper (Capsicum annuum L.) Caused by Xanthomonas campestris pv. vesicatoria. Scientific Phytopathological Laboratory (SPL) progress Report for the period, 86: 192-99.

Lemma, D. 2002. Tomatoes; Research experiences and production prospects. EARO Report. No. 43. Addis Ababa, Ethiopia.

Leslie, J. F. and B. A. Summerell. 2008. The Fusarium Laboratory Manual. John Wiley & Sons.

Mehrotra, R. S. and A. Aggarwal. 2003. Rots, Damping offs, Downy mildews and White Rusts. In, Plant Pathology. Tata McGraw-Hill Publishing Company Limited. New Delhi, India.

Mekonen, S. and A. Chala. 2014. Assessment of hot pepper (Capsicum species) diseases in southern Ethiopia. International Journal of Science and Research, 3: 91-95.

Mengist, Y., D. Tadesse and A. Birara. 2019. Assessment of prevalence, incidence and severity of red pepper disease in Capsicum frutescens L. at central Gondar, Ethiopia. Journal of Academia and Industrial Research, 8: 45-53.

Mihajlovic, M., E. Rekanovic, J. Hrustic, M. Grahovac and B. Tanovic. 2017. Methods for management of soilborne plant pathogens. Pesticidi i fitomedicina, 32: 9-24.

Mulaa, M., E. Negussie, H. Mibei, D. Onyango, M. Bateman, A. Wood and J. Dougoud. 2018. Study on crop protection where the ‘Green Innovation Centres for the Agriculture and Food Sector’(GIAE) initiative is being implemented. CAB International.

Rather, T. R., V. K. Razdan, A. K. Tewari, E. Shanaz, Z. A. Bhat, M. G. Hassan and T. A. Wani. 2012. Integrated management of wilt complex disease in bell paper (Capsicum annuum L.). Journal of Agricultural Science, 4: 141-47.

Sadessa, K., T. Hunduma and M. Assefa. 2016. Characterization and evaluation of hot pepper (Capsicum annuum L.) cultivars against bacterial wilt disease (Ralstonia solanacearum).

SAS. 2015. SAS 9.4® Intelligence Platform: System Administration Guide Statistical Analysis System. SAS institute. Inc. Cary. North Carolina, USA.

Tameru, A., J. Hamacher and H. W. Dehne. 2003. The increase in importance of Ethiopian Pepper mottle virus (EPMV) in the rift valley part of Ethiopia Time to create Awareness among researchers an extension workers. Pepper presented at Deutsches Tropentage.

Tripodi, P. and S. Kumar. 2019. The Capsicum Crop: An Introduction Compendium of Plant Genomes. Springer International Publishing. pp. 1-8.

Tucker, C. M. 1931. Taxonomy of the genus Phytophthora de BaryUniversity of Missouri Agricultural Experiment Station Research Bulletin.

Yandoc-Ables, C. B., E. N. Rosskopf and E. M. Lamb. 2007. Management of phytophthora crown rot in pumpkin and zucchini seedlings with phosphonates. Plant disease, 91: 1651-56.

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DOI: 10.33687/phytopath.010.02.3629


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