Survey of Tea (<i>Camellia sinensis</i>) Diseases in Southwestern Ethiopia

Nagassa Dechassa; Gabissa Gidissa; Legese Hagos; Mohammedsani Zakir; Lemi Beksisa; Melaku Adisu

doi:doi:10.11648/j.ajbio.20200806.11

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Survey of Tea (Camellia sinensis) Diseases in Southwestern Ethiopia

Nagassa Dechassa, Gabissa Gidissa, Legese Hagos, Mohammedsani Zakir, Lemi Beksisa, Melaku Adisu

Published in American Journal of BioScience (Volume 8, Issue 6)

Received: 7 October 2020 Accepted: 27 October 2020 Published: 11 November 2020

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Abstract

Tea (Camellia sinensis) is one of the most commonly consumed beverages next to water worldwide. However its production and productivity is constrained by many fungal diseases in Ethiopia. Despite this, there is lack of information on the status of the diseases and lack of knowledge on features of the pathogens associated with the diseases as there have been no any systematic assessments conducted so far. Therefore, the current works were designed with the objectives to assess the distribution of tea diseases and identify the associated pathogens. For this purpose, field surveys were carried out across three tea estate farms (Wushwush, Chewaka and Gumaro) and tea out growers surrounding them in Kafa, Sheka and Ilu Aba Bora zones in Southwest Ethiopia during the 2019 season. Causative pathogens of the diseases were identified using cultural and morphological features. The average Fusarium wilt incidence varied from (0 to 20%), Black rot (7-15%), Bird’s eye spot (4-15%), Brown blight (2-5%) and Grey blight (0.5-5%) while mean disease severity of Black rot, Eye spot, Brown blight and Grey blight ranged from 4-11%, 3-9%, 1-5% and 0.5-5%, respectively. Fusarium wilt, black rot disease and eye spot diseases of tea directly related to tea yield loss. Algal leaf spot disease caused by Cephaleuros virescens was observed at Gumaro tea estate farm on the older leaves of aged tea bushes. The present study revealed the economic importance of tea diseases in Southwest Ethiopia. Future research should be directed towards the investigation and determination of management options for the control of important diseases of tea in the country.

Published in	American Journal of BioScience (Volume 8, Issue 6)
DOI	10.11648/j.ajbio.20200806.11
Page(s)	139-149
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), 2020. Published by Science Publishing Group

Keywords

Blight, Eye Spot, Fungal Diseases, Fusarium Wilt, Tea Bushes

References

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APA Style

Nagassa Dechassa, Gabissa Gidissa, Legese Hagos, Mohammedsani Zakir, Lemi Beksisa, et al. (2020). Survey of Tea (Camellia sinensis) Diseases in Southwestern Ethiopia. American Journal of BioScience, 8(6), 139-149. https://doi.org/10.11648/j.ajbio.20200806.11

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ACS Style

Nagassa Dechassa; Gabissa Gidissa; Legese Hagos; Mohammedsani Zakir; Lemi Beksisa, et al. Survey of Tea (Camellia sinensis) Diseases in Southwestern Ethiopia. Am. J. BioScience 2020, 8(6), 139-149. doi: 10.11648/j.ajbio.20200806.11

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AMA Style

Nagassa Dechassa, Gabissa Gidissa, Legese Hagos, Mohammedsani Zakir, Lemi Beksisa, et al. Survey of Tea (Camellia sinensis) Diseases in Southwestern Ethiopia. Am J BioScience. 2020;8(6):139-149. doi: 10.11648/j.ajbio.20200806.11

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@article{10.11648/j.ajbio.20200806.11,
  author = {Nagassa Dechassa and Gabissa Gidissa and Legese Hagos and Mohammedsani Zakir and Lemi Beksisa and Melaku Adisu},
  title = {Survey of Tea (Camellia sinensis) Diseases in Southwestern Ethiopia},
  journal = {American Journal of BioScience},
  volume = {8},
  number = {6},
  pages = {139-149},
  doi = {10.11648/j.ajbio.20200806.11},
  url = {https://doi.org/10.11648/j.ajbio.20200806.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajbio.20200806.11},
  abstract = {Tea (Camellia sinensis) is one of the most commonly consumed beverages next to water worldwide. However its production and productivity is constrained by many fungal diseases in Ethiopia. Despite this, there is lack of information on the status of the diseases and lack of knowledge on features of the pathogens associated with the diseases as there have been no any systematic assessments conducted so far. Therefore, the current works were designed with the objectives to assess the distribution of tea diseases and identify the associated pathogens. For this purpose, field surveys were carried out across three tea estate farms (Wushwush, Chewaka and Gumaro) and tea out growers surrounding them in Kafa, Sheka and Ilu Aba Bora zones in Southwest Ethiopia during the 2019 season. Causative pathogens of the diseases were identified using cultural and morphological features. The average Fusarium wilt incidence varied from (0 to 20%), Black rot (7-15%), Bird’s eye spot (4-15%), Brown blight (2-5%) and Grey blight (0.5-5%) while mean disease severity of Black rot, Eye spot, Brown blight and Grey blight ranged from 4-11%, 3-9%, 1-5% and 0.5-5%, respectively. Fusarium wilt, black rot disease and eye spot diseases of tea directly related to tea yield loss. Algal leaf spot disease caused by Cephaleuros virescens was observed at Gumaro tea estate farm on the older leaves of aged tea bushes. The present study revealed the economic importance of tea diseases in Southwest Ethiopia. Future research should be directed towards the investigation and determination of management options for the control of important diseases of tea in the country.},
 year = {2020}
}

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TY  - JOUR
T1  - Survey of Tea (Camellia sinensis) Diseases in Southwestern Ethiopia
AU  - Nagassa Dechassa
AU  - Gabissa Gidissa
AU  - Legese Hagos
AU  - Mohammedsani Zakir
AU  - Lemi Beksisa
AU  - Melaku Adisu
Y1  - 2020/11/11
PY  - 2020
N1  - https://doi.org/10.11648/j.ajbio.20200806.11
DO  - 10.11648/j.ajbio.20200806.11
T2  - American Journal of BioScience
JF  - American Journal of BioScience
JO  - American Journal of BioScience
SP  - 139
EP  - 149
PB  - Science Publishing Group
SN  - 2330-0167
UR  - https://doi.org/10.11648/j.ajbio.20200806.11
AB  - Tea (Camellia sinensis) is one of the most commonly consumed beverages next to water worldwide. However its production and productivity is constrained by many fungal diseases in Ethiopia. Despite this, there is lack of information on the status of the diseases and lack of knowledge on features of the pathogens associated with the diseases as there have been no any systematic assessments conducted so far. Therefore, the current works were designed with the objectives to assess the distribution of tea diseases and identify the associated pathogens. For this purpose, field surveys were carried out across three tea estate farms (Wushwush, Chewaka and Gumaro) and tea out growers surrounding them in Kafa, Sheka and Ilu Aba Bora zones in Southwest Ethiopia during the 2019 season. Causative pathogens of the diseases were identified using cultural and morphological features. The average Fusarium wilt incidence varied from (0 to 20%), Black rot (7-15%), Bird’s eye spot (4-15%), Brown blight (2-5%) and Grey blight (0.5-5%) while mean disease severity of Black rot, Eye spot, Brown blight and Grey blight ranged from 4-11%, 3-9%, 1-5% and 0.5-5%, respectively. Fusarium wilt, black rot disease and eye spot diseases of tea directly related to tea yield loss. Algal leaf spot disease caused by Cephaleuros virescens was observed at Gumaro tea estate farm on the older leaves of aged tea bushes. The present study revealed the economic importance of tea diseases in Southwest Ethiopia. Future research should be directed towards the investigation and determination of management options for the control of important diseases of tea in the country.
VL  - 8
IS  - 6
ER  -

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Author Information

Nagassa Dechassa

Ethiopian Institute of Agricultural Research, Jimma Agricultural Research, Jimma, Ethiopia
Gabissa Gidissa

Ethiopian Institute of Agricultural Research, Jimma Agricultural Research, Jimma, Ethiopia
Legese Hagos

Ethiopian Institute of Agricultural Research, Jimma Agricultural Research, Jimma, Ethiopia
Mohammedsani Zakir

Ethiopian Institute of Agricultural Research, Jimma Agricultural Research, Jimma, Ethiopia
Lemi Beksisa

Ethiopian Institute of Agricultural Research, Jimma Agricultural Research, Jimma, Ethiopia
Melaku Adisu

Ethiopian Institute of Agricultural Research, Jimma Agricultural Research, Jimma, Ethiopia

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APA Style

Nagassa Dechassa, Gabissa Gidissa, Legese Hagos, Mohammedsani Zakir, Lemi Beksisa, et al. (2020). Survey of Tea (Camellia sinensis) Diseases in Southwestern Ethiopia. American Journal of BioScience, 8(6), 139-149. https://doi.org/10.11648/j.ajbio.20200806.11

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ACS Style

Nagassa Dechassa; Gabissa Gidissa; Legese Hagos; Mohammedsani Zakir; Lemi Beksisa, et al. Survey of Tea (Camellia sinensis) Diseases in Southwestern Ethiopia. Am. J. BioScience 2020, 8(6), 139-149. doi: 10.11648/j.ajbio.20200806.11

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AMA Style

Nagassa Dechassa, Gabissa Gidissa, Legese Hagos, Mohammedsani Zakir, Lemi Beksisa, et al. Survey of Tea (Camellia sinensis) Diseases in Southwestern Ethiopia. Am J BioScience. 2020;8(6):139-149. doi: 10.11648/j.ajbio.20200806.11

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@article{10.11648/j.ajbio.20200806.11,
  author = {Nagassa Dechassa and Gabissa Gidissa and Legese Hagos and Mohammedsani Zakir and Lemi Beksisa and Melaku Adisu},
  title = {Survey of Tea (Camellia sinensis) Diseases in Southwestern Ethiopia},
  journal = {American Journal of BioScience},
  volume = {8},
  number = {6},
  pages = {139-149},
  doi = {10.11648/j.ajbio.20200806.11},
  url = {https://doi.org/10.11648/j.ajbio.20200806.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajbio.20200806.11},
  abstract = {Tea (Camellia sinensis) is one of the most commonly consumed beverages next to water worldwide. However its production and productivity is constrained by many fungal diseases in Ethiopia. Despite this, there is lack of information on the status of the diseases and lack of knowledge on features of the pathogens associated with the diseases as there have been no any systematic assessments conducted so far. Therefore, the current works were designed with the objectives to assess the distribution of tea diseases and identify the associated pathogens. For this purpose, field surveys were carried out across three tea estate farms (Wushwush, Chewaka and Gumaro) and tea out growers surrounding them in Kafa, Sheka and Ilu Aba Bora zones in Southwest Ethiopia during the 2019 season. Causative pathogens of the diseases were identified using cultural and morphological features. The average Fusarium wilt incidence varied from (0 to 20%), Black rot (7-15%), Bird’s eye spot (4-15%), Brown blight (2-5%) and Grey blight (0.5-5%) while mean disease severity of Black rot, Eye spot, Brown blight and Grey blight ranged from 4-11%, 3-9%, 1-5% and 0.5-5%, respectively. Fusarium wilt, black rot disease and eye spot diseases of tea directly related to tea yield loss. Algal leaf spot disease caused by Cephaleuros virescens was observed at Gumaro tea estate farm on the older leaves of aged tea bushes. The present study revealed the economic importance of tea diseases in Southwest Ethiopia. Future research should be directed towards the investigation and determination of management options for the control of important diseases of tea in the country.},
 year = {2020}
}

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TY  - JOUR
T1  - Survey of Tea (Camellia sinensis) Diseases in Southwestern Ethiopia
AU  - Nagassa Dechassa
AU  - Gabissa Gidissa
AU  - Legese Hagos
AU  - Mohammedsani Zakir
AU  - Lemi Beksisa
AU  - Melaku Adisu
Y1  - 2020/11/11
PY  - 2020
N1  - https://doi.org/10.11648/j.ajbio.20200806.11
DO  - 10.11648/j.ajbio.20200806.11
T2  - American Journal of BioScience
JF  - American Journal of BioScience
JO  - American Journal of BioScience
SP  - 139
EP  - 149
PB  - Science Publishing Group
SN  - 2330-0167
UR  - https://doi.org/10.11648/j.ajbio.20200806.11
AB  - Tea (Camellia sinensis) is one of the most commonly consumed beverages next to water worldwide. However its production and productivity is constrained by many fungal diseases in Ethiopia. Despite this, there is lack of information on the status of the diseases and lack of knowledge on features of the pathogens associated with the diseases as there have been no any systematic assessments conducted so far. Therefore, the current works were designed with the objectives to assess the distribution of tea diseases and identify the associated pathogens. For this purpose, field surveys were carried out across three tea estate farms (Wushwush, Chewaka and Gumaro) and tea out growers surrounding them in Kafa, Sheka and Ilu Aba Bora zones in Southwest Ethiopia during the 2019 season. Causative pathogens of the diseases were identified using cultural and morphological features. The average Fusarium wilt incidence varied from (0 to 20%), Black rot (7-15%), Bird’s eye spot (4-15%), Brown blight (2-5%) and Grey blight (0.5-5%) while mean disease severity of Black rot, Eye spot, Brown blight and Grey blight ranged from 4-11%, 3-9%, 1-5% and 0.5-5%, respectively. Fusarium wilt, black rot disease and eye spot diseases of tea directly related to tea yield loss. Algal leaf spot disease caused by Cephaleuros virescens was observed at Gumaro tea estate farm on the older leaves of aged tea bushes. The present study revealed the economic importance of tea diseases in Southwest Ethiopia. Future research should be directed towards the investigation and determination of management options for the control of important diseases of tea in the country.
VL  - 8
IS  - 6
ER  -

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