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RESEARCH ARTICLE:
Screening of selected improved cassava varieties for bacterial blight and varietal performance under natural environment in Ibadan, south-western Nigeria
J. N. Azorji (1), C. E., Igwe (2) and C. Kanu (2)
1Environmental Management and Toxicology, Michael Okpara University of Agriculture, Umudike, Nigeria
2Dept. of Botany, University of Ibadan, Ibadan, Nigeria
J. Mole. Stud. Medici. Res., Volume 01, Issue 02, pp. 63-69 | Available online: 14 November 2016
DOI: 10.18801/jmsmr.010216.08
Screening of selected improved cassava varieties for bacterial blight and varietal performance under natural environment in Ibadan, south-western Nigeria
J. N. Azorji (1), C. E., Igwe (2) and C. Kanu (2)
1Environmental Management and Toxicology, Michael Okpara University of Agriculture, Umudike, Nigeria
2Dept. of Botany, University of Ibadan, Ibadan, Nigeria
J. Mole. Stud. Medici. Res., Volume 01, Issue 02, pp. 63-69 | Available online: 14 November 2016
DOI: 10.18801/jmsmr.010216.08
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Title: Screening of selected improved cassava varieties for bacterial blight and varietal performance under natural environment in Ibadan, south-western Nigeria
Abstract: Cassava production is bedeviled by a plethora of biotic constraints among which Bacterial Blight is of most economic important in most cassava growing regions of Sub-Saharan Africa and Asia. Deployment of improved resistant varieties by various research institutes have thus far brought the disease under control, but continuous monitoring remains imperative to forestall further outbreak. For this reason, field experiment was performed to specifically screen six improved cassava varieties for CBB incidence and severity under natural environment at the botany research farm, University of Ibadan, Ibadan, Nigeria. The experimental field was laid out in a Randomized Complete Block Design with four replications each. The plot size was 20m x 41m comprising ridges each measuring 10m with 1m interval. Parameters assessed were disease incidence, disease severity scores and varietal performance for each genotype. Results from statistical analysis of SAS 9.3 (SAS, 2010) revealed that all the varieties expressed moderate to resistant (2.25-1.75) reaction to CBB severity in the field. Pearson correlation coefficient also indicated a significant negative correlation between root yield and root weight. From the foregoing, the result implicitly showed that farmers could reduce the high incidence of CBB in their farms and increase their yield by replacing the local lines with the improved varieties. Government should also organize programs (such as seminars and talk shows) addressing cassava diseases to further enlighten farmers on the importance of adopting improved cassava cultivation.
Key Words: Cassava, Screening, Bacterial Blight, Disease, Incidence and Severity
Abstract: Cassava production is bedeviled by a plethora of biotic constraints among which Bacterial Blight is of most economic important in most cassava growing regions of Sub-Saharan Africa and Asia. Deployment of improved resistant varieties by various research institutes have thus far brought the disease under control, but continuous monitoring remains imperative to forestall further outbreak. For this reason, field experiment was performed to specifically screen six improved cassava varieties for CBB incidence and severity under natural environment at the botany research farm, University of Ibadan, Ibadan, Nigeria. The experimental field was laid out in a Randomized Complete Block Design with four replications each. The plot size was 20m x 41m comprising ridges each measuring 10m with 1m interval. Parameters assessed were disease incidence, disease severity scores and varietal performance for each genotype. Results from statistical analysis of SAS 9.3 (SAS, 2010) revealed that all the varieties expressed moderate to resistant (2.25-1.75) reaction to CBB severity in the field. Pearson correlation coefficient also indicated a significant negative correlation between root yield and root weight. From the foregoing, the result implicitly showed that farmers could reduce the high incidence of CBB in their farms and increase their yield by replacing the local lines with the improved varieties. Government should also organize programs (such as seminars and talk shows) addressing cassava diseases to further enlighten farmers on the importance of adopting improved cassava cultivation.
Key Words: Cassava, Screening, Bacterial Blight, Disease, Incidence and Severity
APA (American Psychological Association)
Azorji, J. N., Igwe, C. E. & Kanu, C. (2016). Screening of selected improved cassava varieties for bacterial blight and varietal performance under natural environment in Ibadan, south-western Nigeria. Journal of Molecular Studies and Medicine Research, 01(02), 63-69.
MLA (Modern Language Association)
Azorji, J. N., Igwe, C. E. & Kanu, C. ''Screening of selected improved cassava varieties for bacterial blight and varietal performance under natural environment in Ibadan, south-western Nigeria.'' Journal of Molecular Studies and Medicine Research, 01.02. (2016): 63-69.
Chicago/Turabian
Azorji, J. N., Igwe, C. E. & Kanu, C. Screening of selected improved cassava varieties for bacterial blight and varietal performance under natural environment in Ibadan, south-western Nigeria. Journal of Molecular Studies and Medicine Research, 01, no. 02 (2016): 63-69.
Azorji, J. N., Igwe, C. E. & Kanu, C. (2016). Screening of selected improved cassava varieties for bacterial blight and varietal performance under natural environment in Ibadan, south-western Nigeria. Journal of Molecular Studies and Medicine Research, 01(02), 63-69.
MLA (Modern Language Association)
Azorji, J. N., Igwe, C. E. & Kanu, C. ''Screening of selected improved cassava varieties for bacterial blight and varietal performance under natural environment in Ibadan, south-western Nigeria.'' Journal of Molecular Studies and Medicine Research, 01.02. (2016): 63-69.
Chicago/Turabian
Azorji, J. N., Igwe, C. E. & Kanu, C. Screening of selected improved cassava varieties for bacterial blight and varietal performance under natural environment in Ibadan, south-western Nigeria. Journal of Molecular Studies and Medicine Research, 01, no. 02 (2016): 63-69.
- Afolabi, C. G., Okechukwu, O. C., kehinde, I. A. & okechukwu, R. U. (2011). Assessment of farmer’s field for root rots disease on improved cassava varieties released in Nigeria. African journal of root and tuber crops, (AJRTC), 9, 50-57.
- Agboola, T. & Ojeleye, D. (2007). Climate change and food crop production in Ibadan, Nigeria. African crop science conference proceedings. vol. 8. pp. 1423-1233.
- Agboola, T. & Olurin, T. A. (2000). Social environmental dimensions of the changing land cover pattern in Ibadan. A hilly indigenous African city. Nig. Jol of economics and social studies, 42(2), 34.
- Akpomie, O. O., Akponah, E. & Okorawhe, P. (2012). Amylase production potential of bacterial isolates obtained from cassava root peels. Agric. Sc. res. jol. 2(2), 95-99.
- Amusa, N. A., Dixon, A. G. O. & Okechukwu, R. U. (2001). Evaluation of cassava genotypes for reaction to five major diseases in the transitional forest of southwestern Nigeria. Jol. Sustain. Agric. Environ. 4, 83-90.
- Ayode, A. R. (2012). Determinants of climate change on cassava production in oyo state, Nigeria. Global journal of science frontier research in agriculture and biology, 12, 0975-5896.
- Banito, A., kpemuoa, K. E. & Wydra, K. (2008). Expression of resistance and tolerance of cassava genotypes to bacterial blight determined by genotype x environment interactions. Jol. of plant diseases. 115(4), 152-161. http://dx.doi.org/10.1007/BF03356261
- Banito, A., Kpemuoa, K. E. & Wydra. K. (2008). Expression of resistance and tolerance of cassava genotypes to bacterial blight determined by genotype x environment interactions. Jol. of plant dis. 44, 343-370. http://dx.doi.org/10.1007/bf03356261
- Chukwuka, K. S., Okechukwu, R. U. & Azorji, J. N. (2013). Farmer perception of cassava bacterial blight disease in Oyo State, south-east, Nigeria. African journal of root and tuber crops (AJRTC), 10(1), 67-74.
- Dankyi, A. A. & Adjekum, A. A. (2007). Determinants of adoption of improved cassava varieties in southern Ghana logistics regression analysis. Proceedings of the 13th international society for tropical root crops symposium (ISTRC’07), Ghana, West Africa. pp. 641-647.
- Daramola, B. & Osanyinlusi, S. A. (2006). Investigation on modification of cassava starch using active components of ginger roots. Afr. Jol. Biotech. 4, 1117-1123.
- Ezedinma, C. I., lemchi, J., Okechukwu, R., Sanni, L., Ogbe, F., Akoroda, M. O. & Dixon, A. (2007). Status of cassava production in Nigeria. In: Mahungu, N. M & Manyong, V. M. (eds.). Advances in root and tuber crops technologies for sustainable food security, improved nutrition, wealth creation and environmental conservation in Africa. Proceedings of 9th ISTRC-AB Symposium, Mombasa, Kenya, 1-5 November, 2004. pp. 183-189
- FAO (2007). Strategic environmental assessment. FAO, ROME.
- FAOSTAT (2009). Online statistical data base. Rome, Italy. www.fao.org.
- Harn, S. K. & keyster, J. (1985). Cassava a basic food of Africa. Outlook on agriculture, 14, 95-100.
- IITA (2005). Report on new cassava varieties.
- Ikotun, T. (2011). Plant pathology: plant afflictions and man’s intervention. Inaugural lecture, Ibadan university press. pp. 13-16.
- Kormawa, P., Tshiunza, M., Dixon, A., Udoh, E. & Okorouwa, V. (2001). Varietal characteristics of cassava: farmer’s perceptions and preferences in semi-arid zone of West Africa. Proceedings of the 8th triennial symposium of international society of root and tuber crops-african branch. November 12-16, 2001, Ghana.
- Lozano, J. C. (1986). Cassava bacterial blight: a manageable disease. Plant dis. 70, 109-1093.
- Muhammad-Lawal, A., Salu, S. A. & Ajayi, S. A. (2012). Economics of improved and local varieties of cassava among farmers in oyo state, Nigeria. Ethiopian journal of environmental studies and management (EJESM), 5, 189- 194.
- Nweke, F. (2004). New challenges in the cassava transformation in Nigeria and Ghana. Environmental and production technology division (EPTD), Discussion paper No. 118, International food policy research institute, Washington D. C., USA, June, 2004. p. 118.
- Oduro, A., Appah, J. & Damptey, H. B. (1999). Reaction of introduced yellow cassava to a cassava bacterial blight isolate in portha court, Nigeria. Ghana Jol. of Sc. 39, 23-31.
- Omonona, B. T., Oni, O. A. & Uwagbe, A. O. (2006). Adoption of improved cassava varieties and its welfare impact on rural farming household in Edo state, Nigeria. J. Agric. Food Inform. 7, 39-55. http://dx.doi.org/10.1300/J108v07n01_05
- Perreaux, D., Terry, E. R & Persley, G. J. (1978). Studies on screening methods of cassava resistance to bacterial blight. In: rep. interdisciplinary workshop Ibadan, Nigeria COPR.
- RTIP (2004). Cassava processing in Ghana. An information guide. Root and tuber improvement program, Ministry of food and agriculture, Ghana.
- Terry, E. R. (1976). Factors affecting the incidence of bacterial blight in Africa. Proc. 4th ISTRC Symp. Cali. Colombia. pp. 179-184. Ottawa Canada: IDRC.
- Vauterin, L., Hoste, B., kersters, K. & Swings, G. J. (1995). Re-classification of cassava xanthomonas . Intern. Jol. System. Bact. 45, 472-489.
- Victor, O., Emmanuel, D. (2012). Adoption of improved cassava varieties in Ghana. Agricultural journal, 7(20), 146-151. http://dx.doi.org/10.1099/00207713-45-3-472
- Wydra, K. (2002). The concept of resistance, tolerance and latency in bacterial diseases: examples from cassava and cowpea: new aspects of resistance research on cultivated plants. Beitr. Zuchtungsforsch, BAZ. 9, 36-43.
- Wydra, K., Banito, A. & Kpemoua, K. E. (2007). Characterization of resistance of cassava genotypes to bacterial blight by evaluation of symptoms in different Eco zones. Euphytica. 155, 337-348. http://dx.doi.org/10.1007/s10681-006-9335-9
- Wydra, K. & Rudolph, K. (1999). Development and implementation of integrated control methods for major diseases of cassava and cowpea in West Africa. Tropen. Subtropen. 133, 174-180.
- Wydra, K. & Msikita, W. (1995). An overview of the present situation of cassava diseases in West Africa. In: Proceedings of the 6th ISTRC-AB Symposium, Lilongwe, Malawi, October 22–28 1995 (in press).
- Wydra, K. & Verdia, V. (2002). Occurrence of cassava diseases in relation to environmental, agronomic and plant characteristics. Agric. Ecosyst. Environ. 93, 211-226.
- Zinsou, V., Wydra, K. & Ahohuendo, B. (2004). Genotype x environment interactions in symptoms development and yield of cassava genotypes in reaction to cassava bacterial blight. Eur. J. Plant Patho. 111, 217-233. http://dx.doi.org/10.1007/s10658-004-2877-6
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