Mapping of Angular Leaf Spot Disease Hotspot Areas in Western Kenya Towards Its Management

Robert Kiptabut Leitich; W. Arinaitwe; B. Mukoye; D. O. Omayio; A. K. Osogo; H. K. Were; J. W. Muthomi; R. M. Otsyula; M. M. Abang

doi:doi:10.11648/j.ajasr.20160206.17

Mapping of Angular Leaf Spot Disease Hotspot Areas in Western Kenya Towards Its Management

Robert Kiptabut Leitich, W. Arinaitwe, B. Mukoye, D. O. Omayio, A. K. Osogo, H. K. Were, J. W. Muthomi, R. M. Otsyula, M. M. Abang

Published in American Journal of Applied Scientific Research (Volume 2, Issue 6)

Received: 23 October 2016 Accepted: 18 November 2016 Published: 21 December 2016

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Abstract

Common bean (Phaseolus vulgaris L. ) is an important crop in the daily diet of more than 300 million people worldwide. Despite its importance, bean productivity is declining in western Kenya due to diseases and use of low yielding susceptible varieties. Among the diseases, ALS is a major biotic constraint of bean production in western Kenya. It causes an estimated yield loss of about 80% in the farmers’ field when severe. There is still limited information on pathogen distribution in western Kenya hindering breeding for ALS resistance. Therefore, a study was conducted to determine the occurrence of ALS disease in bean growing areas of western Kenya. A disease survey was carried out during the long and short rains seasons of 2013 in six agro-ecological zones namely: Low midland zone 1 (LM1) (Rongo and Bumula), low midland zone 2 (LM2) (Busia, Bungoma and Rangwe), low midland zone 3 (LM3) (Siaya and Teso north), low midland zone 4 (LM4) (Bondo), lower highlands (LH1) (Nandi Central) and upper midland zone 1 (UM1) (Sabatia and Nandi south). UM1 recorded the highest disease incidence and severity, whereas LM4 registered the least. Similarly, there was a significant positive correlation between disease incidence and severity (r = 0.711; p<0.0001). The study found the incidence and severity levels of ALS in western Kenya as high as 100% and 3 respectively. Therefore, farmers should be encouraged to use certified seeds to minimise the severity of the disease.

Published in	American Journal of Applied Scientific Research (Volume 2, Issue 6)
DOI	10.11648/j.ajasr.20160206.17
Page(s)	75-81
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), 2016. Published by Science Publishing Group

Keywords

Beans, Incidence, Phaeoisariopsis griseola, Severity, Survey

References

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APA Style

Robert Kiptabut Leitich, W. Arinaitwe, B. Mukoye, D. O. Omayio, A. K. Osogo, et al. (2016). Mapping of Angular Leaf Spot Disease Hotspot Areas in Western Kenya Towards Its Management. American Journal of Applied Scientific Research, 2(6), 75-81. https://doi.org/10.11648/j.ajasr.20160206.17

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ACS Style

Robert Kiptabut Leitich; W. Arinaitwe; B. Mukoye; D. O. Omayio; A. K. Osogo, et al. Mapping of Angular Leaf Spot Disease Hotspot Areas in Western Kenya Towards Its Management. Am. J. Appl. Sci. Res. 2016, 2(6), 75-81. doi: 10.11648/j.ajasr.20160206.17

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AMA Style

Robert Kiptabut Leitich, W. Arinaitwe, B. Mukoye, D. O. Omayio, A. K. Osogo, et al. Mapping of Angular Leaf Spot Disease Hotspot Areas in Western Kenya Towards Its Management. Am J Appl Sci Res. 2016;2(6):75-81. doi: 10.11648/j.ajasr.20160206.17

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@article{10.11648/j.ajasr.20160206.17,
  author = {Robert Kiptabut Leitich and W. Arinaitwe and B. Mukoye and D. O. Omayio and A. K. Osogo and H. K. Were and J. W. Muthomi and R. M. Otsyula and M. M. Abang},
  title = {Mapping of Angular Leaf Spot Disease Hotspot Areas in Western Kenya Towards Its Management},
  journal = {American Journal of Applied Scientific Research},
  volume = {2},
  number = {6},
  pages = {75-81},
  doi = {10.11648/j.ajasr.20160206.17},
  url = {https://doi.org/10.11648/j.ajasr.20160206.17},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajasr.20160206.17},
  abstract = {Common bean (Phaseolus vulgaris L. ) is an important crop in the daily diet of more than 300 million people worldwide. Despite its importance, bean productivity is declining in western Kenya due to diseases and use of low yielding susceptible varieties. Among the diseases, ALS is a major biotic constraint of bean production in western Kenya. It causes an estimated yield loss of about 80% in the farmers’ field when severe. There is still limited information on pathogen distribution in western Kenya hindering breeding for ALS resistance. Therefore, a study was conducted to determine the occurrence of ALS disease in bean growing areas of western Kenya. A disease survey was carried out during the long and short rains seasons of 2013 in six agro-ecological zones namely: Low midland zone 1 (LM1) (Rongo and Bumula), low midland zone 2 (LM2) (Busia, Bungoma and Rangwe), low midland zone 3 (LM3) (Siaya and Teso north), low midland zone 4 (LM4) (Bondo), lower highlands (LH1) (Nandi Central) and upper midland zone 1 (UM1) (Sabatia and Nandi south). UM1 recorded the highest disease incidence and severity, whereas LM4 registered the least. Similarly, there was a significant positive correlation between disease incidence and severity (r = 0.711; p<0.0001). The study found the incidence and severity levels of ALS in western Kenya as high as 100% and 3 respectively. Therefore, farmers should be encouraged to use certified seeds to minimise the severity of the disease.},
 year = {2016}
}

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TY - JOUR
T1 - Mapping of Angular Leaf Spot Disease Hotspot Areas in Western Kenya Towards Its Management
AU - Robert Kiptabut Leitich
AU - W. Arinaitwe
AU - B. Mukoye
AU - D. O. Omayio
AU - A. K. Osogo
AU - H. K. Were
AU - J. W. Muthomi
AU - R. M. Otsyula
AU - M. M. Abang
Y1 - 2016/12/21
PY - 2016
N1 - https://doi.org/10.11648/j.ajasr.20160206.17
DO - 10.11648/j.ajasr.20160206.17
T2 - American Journal of Applied Scientific Research
JF - American Journal of Applied Scientific Research
JO - American Journal of Applied Scientific Research
SP - 75
EP - 81
PB - Science Publishing Group
SN - 2471-9730
UR - https://doi.org/10.11648/j.ajasr.20160206.17
AB - Common bean (Phaseolus vulgaris L. ) is an important crop in the daily diet of more than 300 million people worldwide. Despite its importance, bean productivity is declining in western Kenya due to diseases and use of low yielding susceptible varieties. Among the diseases, ALS is a major biotic constraint of bean production in western Kenya. It causes an estimated yield loss of about 80% in the farmers’ field when severe. There is still limited information on pathogen distribution in western Kenya hindering breeding for ALS resistance. Therefore, a study was conducted to determine the occurrence of ALS disease in bean growing areas of western Kenya. A disease survey was carried out during the long and short rains seasons of 2013 in six agro-ecological zones namely: Low midland zone 1 (LM1) (Rongo and Bumula), low midland zone 2 (LM2) (Busia, Bungoma and Rangwe), low midland zone 3 (LM3) (Siaya and Teso north), low midland zone 4 (LM4) (Bondo), lower highlands (LH1) (Nandi Central) and upper midland zone 1 (UM1) (Sabatia and Nandi south). UM1 recorded the highest disease incidence and severity, whereas LM4 registered the least. Similarly, there was a significant positive correlation between disease incidence and severity (r = 0.711; p<0.0001). The study found the incidence and severity levels of ALS in western Kenya as high as 100% and 3 respectively. Therefore, farmers should be encouraged to use certified seeds to minimise the severity of the disease.
VL - 2
IS - 6
ER -

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Author Information

Robert Kiptabut Leitich

Biological Sciences Department, Faculty of Science, Masinde Muliro University of Science and Technology (MMUST), Kakamega, Kenya
W. Arinaitwe

International Centre for Tropical Agriculture (CIAT), Kawanda, Uganda
B. Mukoye

Biological Sciences Department, Faculty of Science, Masinde Muliro University of Science and Technology (MMUST), Kakamega, Kenya
D. O. Omayio

Biological Sciences Department, Faculty of Science, Masinde Muliro University of Science and Technology (MMUST), Kakamega, Kenya
A. K. Osogo

Biological Sciences Department, Faculty of Science, Kibabii University, Bungoma, Kenya
H. K. Were

Biological Sciences Department, Faculty of Science, Masinde Muliro University of Science and Technology (MMUST), Kakamega, Kenya
J. W. Muthomi

Department of Plant Science and Crop Protection, Faculty of Agriculture, University of Nairobi (UON), Nairobi, Kenya
R. M. Otsyula

Kenya Agricultural and Livestock Research Organisation (KALRO), Kakamega, Kenya
M. M. Abang

Food and Agriculture Organization (FAO) of the United Nations, Addis Ababa, Ethiopia

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APA Style

Robert Kiptabut Leitich, W. Arinaitwe, B. Mukoye, D. O. Omayio, A. K. Osogo, et al. (2016). Mapping of Angular Leaf Spot Disease Hotspot Areas in Western Kenya Towards Its Management. American Journal of Applied Scientific Research, 2(6), 75-81. https://doi.org/10.11648/j.ajasr.20160206.17

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ACS Style

Robert Kiptabut Leitich; W. Arinaitwe; B. Mukoye; D. O. Omayio; A. K. Osogo, et al. Mapping of Angular Leaf Spot Disease Hotspot Areas in Western Kenya Towards Its Management. Am. J. Appl. Sci. Res. 2016, 2(6), 75-81. doi: 10.11648/j.ajasr.20160206.17

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AMA Style

Robert Kiptabut Leitich, W. Arinaitwe, B. Mukoye, D. O. Omayio, A. K. Osogo, et al. Mapping of Angular Leaf Spot Disease Hotspot Areas in Western Kenya Towards Its Management. Am J Appl Sci Res. 2016;2(6):75-81. doi: 10.11648/j.ajasr.20160206.17

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@article{10.11648/j.ajasr.20160206.17,
  author = {Robert Kiptabut Leitich and W. Arinaitwe and B. Mukoye and D. O. Omayio and A. K. Osogo and H. K. Were and J. W. Muthomi and R. M. Otsyula and M. M. Abang},
  title = {Mapping of Angular Leaf Spot Disease Hotspot Areas in Western Kenya Towards Its Management},
  journal = {American Journal of Applied Scientific Research},
  volume = {2},
  number = {6},
  pages = {75-81},
  doi = {10.11648/j.ajasr.20160206.17},
  url = {https://doi.org/10.11648/j.ajasr.20160206.17},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajasr.20160206.17},
  abstract = {Common bean (Phaseolus vulgaris L. ) is an important crop in the daily diet of more than 300 million people worldwide. Despite its importance, bean productivity is declining in western Kenya due to diseases and use of low yielding susceptible varieties. Among the diseases, ALS is a major biotic constraint of bean production in western Kenya. It causes an estimated yield loss of about 80% in the farmers’ field when severe. There is still limited information on pathogen distribution in western Kenya hindering breeding for ALS resistance. Therefore, a study was conducted to determine the occurrence of ALS disease in bean growing areas of western Kenya. A disease survey was carried out during the long and short rains seasons of 2013 in six agro-ecological zones namely: Low midland zone 1 (LM1) (Rongo and Bumula), low midland zone 2 (LM2) (Busia, Bungoma and Rangwe), low midland zone 3 (LM3) (Siaya and Teso north), low midland zone 4 (LM4) (Bondo), lower highlands (LH1) (Nandi Central) and upper midland zone 1 (UM1) (Sabatia and Nandi south). UM1 recorded the highest disease incidence and severity, whereas LM4 registered the least. Similarly, there was a significant positive correlation between disease incidence and severity (r = 0.711; p<0.0001). The study found the incidence and severity levels of ALS in western Kenya as high as 100% and 3 respectively. Therefore, farmers should be encouraged to use certified seeds to minimise the severity of the disease.},
 year = {2016}
}

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