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PREVALENCE AND INCIDENCE OF FOUR COMMON BEAN ROOT ROTS IN UGANDA

Root rots are one of the main biotic constraints to common bean (Phaseolus vulgaris L.) production, causing losses estimated at 221 000 metric tons a year in sub-Saharan Africa. Until recently, root rots in Ugandan common bean agroecologies were mostly caused by Pythium and Fusarium spp., especially...

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Autores principales: PAPARU, P., ACUR, A., KATO, F., ACAM, C., NAKIBUULE, J., MUSOKE, S., NKALUBO, S., MUKANKUSI, C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Cambridge University Press 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7507802/
https://www.ncbi.nlm.nih.gov/pubmed/32981948
http://dx.doi.org/10.1017/s0014479717000461
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author PAPARU, P.
ACUR, A.
KATO, F.
ACAM, C.
NAKIBUULE, J.
MUSOKE, S.
NKALUBO, S.
MUKANKUSI, C.
author_facet PAPARU, P.
ACUR, A.
KATO, F.
ACAM, C.
NAKIBUULE, J.
MUSOKE, S.
NKALUBO, S.
MUKANKUSI, C.
author_sort PAPARU, P.
collection PubMed
description Root rots are one of the main biotic constraints to common bean (Phaseolus vulgaris L.) production, causing losses estimated at 221 000 metric tons a year in sub-Saharan Africa. Until recently, root rots in Ugandan common bean agroecologies were mostly caused by Pythium and Fusarium spp., especially in high altitude areas. But now, severe root rots are observed in low and medium altitude agroecologies characterized by dry and warm conditions. The objective of our study was therefore to ascertain the current prevalence and incidence of common bean root rot diseases in Ugandan common bean agroecologies. Our results show that root rots were present in all seven agroecologies surveyed. Overall, the most rampant root rot was southern blight caused by Sclerotium rolfsii Sacc., followed by root rots caused by Fusarium spp., Pythium spp. and Rhizoctonia solani, respectively. Our study clearly showed the influence of environmental conditions on the prevalence and incidence of common bean root rots. While Fusarium and Pythium root rots are favoured under low air temperature and high air humidity in highland areas, high incidence of southern blight is favoured by warm and moist conditions of lowland areas. The prevalence and incidence of common bean root rots was mapped, providing a reliable baseline for future studies. Similarly, hotspots identified for common bean root rots will be a very useful resource for evaluation of germplasm and breeding lines for resistance to root rots.
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spelling pubmed-75078022020-09-23 PREVALENCE AND INCIDENCE OF FOUR COMMON BEAN ROOT ROTS IN UGANDA PAPARU, P. ACUR, A. KATO, F. ACAM, C. NAKIBUULE, J. MUSOKE, S. NKALUBO, S. MUKANKUSI, C. Exp Agric Articles Root rots are one of the main biotic constraints to common bean (Phaseolus vulgaris L.) production, causing losses estimated at 221 000 metric tons a year in sub-Saharan Africa. Until recently, root rots in Ugandan common bean agroecologies were mostly caused by Pythium and Fusarium spp., especially in high altitude areas. But now, severe root rots are observed in low and medium altitude agroecologies characterized by dry and warm conditions. The objective of our study was therefore to ascertain the current prevalence and incidence of common bean root rot diseases in Ugandan common bean agroecologies. Our results show that root rots were present in all seven agroecologies surveyed. Overall, the most rampant root rot was southern blight caused by Sclerotium rolfsii Sacc., followed by root rots caused by Fusarium spp., Pythium spp. and Rhizoctonia solani, respectively. Our study clearly showed the influence of environmental conditions on the prevalence and incidence of common bean root rots. While Fusarium and Pythium root rots are favoured under low air temperature and high air humidity in highland areas, high incidence of southern blight is favoured by warm and moist conditions of lowland areas. The prevalence and incidence of common bean root rots was mapped, providing a reliable baseline for future studies. Similarly, hotspots identified for common bean root rots will be a very useful resource for evaluation of germplasm and breeding lines for resistance to root rots. Cambridge University Press 2017-09-25 2017 /pmc/articles/PMC7507802/ /pubmed/32981948 http://dx.doi.org/10.1017/s0014479717000461 Text en © Cambridge University Press 2017 http://creativecommons.org/licenses/by/4.0/ Open Access article, distributed under the terms of the Creative Commons Attribution licence, which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Articles
PAPARU, P.
ACUR, A.
KATO, F.
ACAM, C.
NAKIBUULE, J.
MUSOKE, S.
NKALUBO, S.
MUKANKUSI, C.
PREVALENCE AND INCIDENCE OF FOUR COMMON BEAN ROOT ROTS IN UGANDA
title PREVALENCE AND INCIDENCE OF FOUR COMMON BEAN ROOT ROTS IN UGANDA
title_full PREVALENCE AND INCIDENCE OF FOUR COMMON BEAN ROOT ROTS IN UGANDA
title_fullStr PREVALENCE AND INCIDENCE OF FOUR COMMON BEAN ROOT ROTS IN UGANDA
title_full_unstemmed PREVALENCE AND INCIDENCE OF FOUR COMMON BEAN ROOT ROTS IN UGANDA
title_short PREVALENCE AND INCIDENCE OF FOUR COMMON BEAN ROOT ROTS IN UGANDA
title_sort prevalence and incidence of four common bean root rots in uganda
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7507802/
https://www.ncbi.nlm.nih.gov/pubmed/32981948
http://dx.doi.org/10.1017/s0014479717000461
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