Cassava Bacterial Blight Disease (CBBD) is a major constraint in cassava production, initially manifesting on the lower leaves as scattered, cigar-shaped, water-soaked lesions. This study aimed to evaluate cassava bacterial blight disease in Sierra Leone. A field trial was conducted at the School of Agriculture and Food Sciences research site to evaluate disease susceptibility of various cassava genotypes and identify elite genotypes for population improvement. The experiment followed an augmented randomized complete block design (ARCBD). Additionally, a farmer field survey was carried out across all districts to assess the distribution and prevalence of CBBD. The cassava genotypes were classified into three categories: resistant (17.6%), susceptible (80.9%), and mildly susceptible (1.5%). Resistant genotypes, such as TME419, SLE0201, and SLE0087, exhibited no disease progression (rAUDPC = 0.0, SSV = 0.0), while susceptible genotypes, including SLICASS 4 and SLE0109, demonstrated rAUDPC values between 1100 and 2999. Genotype SLE0092 was the most severely affected, displaying the highest disease incidence (50%) and severity (3.1) nine weeks post-planting. The highest root weight (14.2 kg) was recorded for genotype SLE0185, while most genotypes showed moderate yields. A survey of 276 cassava fields across Sierra Leone revealed a widespread occurrence of CBBD, with a national mean incidence of 60.4%, which was notably higher in the Eastern region (69.2%) and Kambia District (78.6%). These findings emphasize the urgent need for the widespread cultivation of CBBD-resistant genotypes.
| Published in | American Journal of Plant Biology (Volume 10, Issue 1) |
| DOI | 10.11648/j.ajpb.20251001.11 |
| Page(s) | 1-9 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2025. Published by Science Publishing Group |
Incidence, Severity, Prevalence, Distribution, Genotypes, Resistance
| [1] | Jianga, T., Ma, H., Wang, J., Tian, H., Zhang, Y., & Liu, S. (2019). Cassava (Manihot esculenta, Crantz) in Africa: Its Contribution to Food Security, Economic Development, and Environmental Sustainability. Food Security Journal, 11(4), 713-723. |
| [2] | FAO (2013). Save and Grow: Cassava. A Guide to Sustainable Production Intensification. Food and Agriculture Organization of the United Nations. Rome, Italy. |
| [3] | Githunguri, C. M., Osir, E. O., & Mugendi, D. (2015). Nutritional Composition of Cassava and the Effects of Processing Methods on Its Nutritional Quality. African Journal of Biotechnology, 14(10), 857-862. |
| [4] | Latif, S., & Müller, J. (2015). Potential of Cassava Leaves in Human Nutrition: A Review. Trends in Food Science & Technology, 44(2), 147-158. |
| [5] | Dankyi, A. A., & Adjekum, D. A. (2007). Cassava Production and Utilization in West Africa: Potentials and Challenges. Accra, Ghana: Ministry of Agriculture. |
| [6] | Nweke, F. I., Spencer, D. S. C., & Lynam, J. K. (2002). The Cassava Transformation: Africa’s Best-Kept Secret. Michigan State University Press. |
| [7] | Ayoade, A. (2012). Cassava Processing, Utilization and Marketing. Journal of Food Science and Nutrition, 3(1), 12-25. |
| [8] | Fomba, S. N., Conteh, M., Samura, I. A., & Kamara, B. S. (2012). Status of Cassava Production in Sierra Leone. In M. C. Akoroda (Ed.), Proceedings of the 11th Triennial Symposium of the International Society for Tropical Root Crops, Africa Branch. Ibadan, Nigeria. |
| [9] | Samura, A. E, Fomba, S. N., Kamara, A. K., & Conteh, M. (2014). Cassava Production and Processing in Sierra Leone: Challenges and Prospects. International Journal of Agriculture and Food Security, 5(1), 32-39. |
| [10] | Fanou, A. A., Wydra, K., Rudolph, K., & Rey, M. E. C. (2018). Cassava bacterial blight: Prevalence, incidence and genetic diversity of Xanthomonas axonopodis pv. Manihotis strains from Africa. Plant Pathology, 67(4), 805-814. |
| [11] | Lozano, J. C. (1986). Cassava bacterial blight: A manageable disease. Plant Disease, 70(12), 1089-1093. |
| [12] | Abdulai, M. S., Koroma, S. J., & Bangura, D. A. (2018). Prevalence of Cassava Bacterial Blight in Sierra Leone and Its Effect on Cassava Yields. Journal of Plant Pathology, 17(2), 123-131. |
| [13] | Toure, A., Zinsou, V., Ahoussi, E., & Fassinou Hotegni, V. (2020). Impacts of Cassava Bacterial Blight on Yields: A Review of Current Practices for Managing the Disease in West Africa. Agriculture and Food Security, 9, 34-45. |
| [14] | Zárate-Chaves, M. A., Lopez, A., Andrade-Piedra, J. L., & Forbes, G. A. (2021). Breeding for Cassava Bacterial Blight Resistance in Latin America and Africa. Plant Disease, 105(1), 76-82. |
| [15] | Wydra K, Msikita W (1998). An Overview of the present situation of cassava diseases in West Africa. In: Akoroda MO, Ngeve JV (eds.) Root crops in the 21st century. Proceedings of the 7th Triennial Symposium of the International Society of the Tropical Root Crops Africa Branch (ISTRC-AB). ISTRC-AB/IITA, Ibadan, Nigeria. pp. 198–206. |
| [16] | Forbes, G. A., Bergamin Filho, A., & Munkvold, G. P. (2014). Estimation of the area under the disease progress curve (AUDPC) and its application in plant disease management research. Plant Disease, 98(7), 911-919. |
| [17] | Ohunakin, S. O., Olowe, V. I. O., & Ibiwoye, T. O. (2019). Evaluation of the relative resistance of maize genotypes to northern leaf blight (Exserohilum turcicum) using sum rank and area under disease progress curve (AUDPC). Journal of Agricultural Science and Technology, 21(3), 589-600. |
| [18] | Malik, A. H., Hoang, T. H., & Dao, D. M. (2022). Evaluation of cassava varieties for resistance to cassava mosaic disease caused by SLCMV in Cambodia. International Journal of CropScience, 15(2), 89-98. |
| [19] | Alusaine Edward Samura, Sahr N. Fomba, Augustine Mansarsy, Musa D. Saffa, Dan D. Quee and Johnny E. Norman (2021). Seasonal Variation on the Incidence and Severity of Major Foliar Diseases of Cassava in Sierra Leone. |
APA Style
Samura, A. E., Kebbie, J., Amara, V., Quee, D. D., Musa, J. (2025). Incidence, Severity, and Distribution of Cassava Bacteria Blight Disease in Sierra Leone. American Journal of Plant Biology, 10(1), 1-9. https://doi.org/10.11648/j.ajpb.20251001.11
ACS Style
Samura, A. E.; Kebbie, J.; Amara, V.; Quee, D. D.; Musa, J. Incidence, Severity, and Distribution of Cassava Bacteria Blight Disease in Sierra Leone. Am. J. Plant Biol. 2025, 10(1), 1-9. doi: 10.11648/j.ajpb.20251001.11
AMA Style
Samura AE, Kebbie J, Amara V, Quee DD, Musa J. Incidence, Severity, and Distribution of Cassava Bacteria Blight Disease in Sierra Leone. Am J Plant Biol. 2025;10(1):1-9. doi: 10.11648/j.ajpb.20251001.11
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Download@article{10.11648/j.ajpb.20251001.11,
author = {Alusaine Edward Samura and Jepson Kebbie and Vandi Amara and David Dan Quee and Joseph Musa},
title = {Incidence, Severity, and Distribution of Cassava Bacteria Blight Disease in Sierra Leone
},
journal = {American Journal of Plant Biology},
volume = {10},
number = {1},
pages = {1-9},
doi = {10.11648/j.ajpb.20251001.11},
url = {https://doi.org/10.11648/j.ajpb.20251001.11},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajpb.20251001.11},
abstract = {Cassava Bacterial Blight Disease (CBBD) is a major constraint in cassava production, initially manifesting on the lower leaves as scattered, cigar-shaped, water-soaked lesions. This study aimed to evaluate cassava bacterial blight disease in Sierra Leone. A field trial was conducted at the School of Agriculture and Food Sciences research site to evaluate disease susceptibility of various cassava genotypes and identify elite genotypes for population improvement. The experiment followed an augmented randomized complete block design (ARCBD). Additionally, a farmer field survey was carried out across all districts to assess the distribution and prevalence of CBBD. The cassava genotypes were classified into three categories: resistant (17.6%), susceptible (80.9%), and mildly susceptible (1.5%). Resistant genotypes, such as TME419, SLE0201, and SLE0087, exhibited no disease progression (rAUDPC = 0.0, SSV = 0.0), while susceptible genotypes, including SLICASS 4 and SLE0109, demonstrated rAUDPC values between 1100 and 2999. Genotype SLE0092 was the most severely affected, displaying the highest disease incidence (50%) and severity (3.1) nine weeks post-planting. The highest root weight (14.2 kg) was recorded for genotype SLE0185, while most genotypes showed moderate yields. A survey of 276 cassava fields across Sierra Leone revealed a widespread occurrence of CBBD, with a national mean incidence of 60.4%, which was notably higher in the Eastern region (69.2%) and Kambia District (78.6%). These findings emphasize the urgent need for the widespread cultivation of CBBD-resistant genotypes.
},
year = {2025}
}
TY - JOUR T1 - Incidence, Severity, and Distribution of Cassava Bacteria Blight Disease in Sierra Leone AU - Alusaine Edward Samura AU - Jepson Kebbie AU - Vandi Amara AU - David Dan Quee AU - Joseph Musa Y1 - 2025/02/27 PY - 2025 N1 - https://doi.org/10.11648/j.ajpb.20251001.11 DO - 10.11648/j.ajpb.20251001.11 T2 - American Journal of Plant Biology JF - American Journal of Plant Biology JO - American Journal of Plant Biology SP - 1 EP - 9 PB - Science Publishing Group SN - 2578-8337 UR - https://doi.org/10.11648/j.ajpb.20251001.11 AB - Cassava Bacterial Blight Disease (CBBD) is a major constraint in cassava production, initially manifesting on the lower leaves as scattered, cigar-shaped, water-soaked lesions. This study aimed to evaluate cassava bacterial blight disease in Sierra Leone. A field trial was conducted at the School of Agriculture and Food Sciences research site to evaluate disease susceptibility of various cassava genotypes and identify elite genotypes for population improvement. The experiment followed an augmented randomized complete block design (ARCBD). Additionally, a farmer field survey was carried out across all districts to assess the distribution and prevalence of CBBD. The cassava genotypes were classified into three categories: resistant (17.6%), susceptible (80.9%), and mildly susceptible (1.5%). Resistant genotypes, such as TME419, SLE0201, and SLE0087, exhibited no disease progression (rAUDPC = 0.0, SSV = 0.0), while susceptible genotypes, including SLICASS 4 and SLE0109, demonstrated rAUDPC values between 1100 and 2999. Genotype SLE0092 was the most severely affected, displaying the highest disease incidence (50%) and severity (3.1) nine weeks post-planting. The highest root weight (14.2 kg) was recorded for genotype SLE0185, while most genotypes showed moderate yields. A survey of 276 cassava fields across Sierra Leone revealed a widespread occurrence of CBBD, with a national mean incidence of 60.4%, which was notably higher in the Eastern region (69.2%) and Kambia District (78.6%). These findings emphasize the urgent need for the widespread cultivation of CBBD-resistant genotypes. VL - 10 IS - 1 ER -
Department of Crop Protection, Njala University, Njala Campus, Sierra Leone
Sierra Leone International Secondary School, Freetown, Sierra Leone
Department of Crop Protection, Njala University, Njala Campus, Sierra Leone
Department of Crop Protection, Njala University, Njala Campus, Sierra Leone
Department of Crop Protection, Njala University, Njala Campus, Sierra Leone
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