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Incidence and distribution of Sweetpotato viruses and their implication on sweetpotato seed system in Malawi

A survey was carried out in 19 districts to investigate the prevalence and distribution of sweetpotato virus disease (SPVD) and its implication on the sustainability of clean seed system in Malawi. A total of 166 leaf samples were collected and tested for the presence of 8 viruses using nitrocellulo...

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Main Authors: Mbewe, W., Mtonga, A., Chiipanthenga, M., Masamba, Kingsley, Chitedze, G., Pamkomera, P., Gondwe, E., Mwenye, O., Chipungu, Felistus P.
Format: Journal Article
Language:Inglés
Published: Springer 2021
Subjects:
sweet potatoes
viroses
potyvirus
crinivirus
Online Access:https://hdl.handle.net/10568/114717
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author Mbewe, W.
Mtonga, A.
Chiipanthenga, M.
Masamba, Kingsley
Chitedze, G.
Pamkomera, P.
Gondwe, E.
Mwenye, O.
Chipungu, Felistus P.
author_browse Chiipanthenga, M.
Chipungu, Felistus P.
Chitedze, G.
Gondwe, E.
Masamba, Kingsley
Mbewe, W.
Mtonga, A.
Mwenye, O.
Pamkomera, P.
author_facet Mbewe, W.
Mtonga, A.
Chiipanthenga, M.
Masamba, Kingsley
Chitedze, G.
Pamkomera, P.
Gondwe, E.
Mwenye, O.
Chipungu, Felistus P.
author_sort Mbewe, W.
collection Repository of Agricultural Research Outputs (CGSpace)
description A survey was carried out in 19 districts to investigate the prevalence and distribution of sweetpotato virus disease (SPVD) and its implication on the sustainability of clean seed system in Malawi. A total of 166 leaf samples were collected and tested for the presence of 8 viruses using nitrocellulose membrane enzyme-linked immunosorbent assay (NCM-ELISA). SPVD foliar symptoms were observed in 68.42% of the surveyed districts. There were significant variations in disease incidence and severity (p < 0.001) among districts, with the highest incidence in Mulanje (28.34%). Average SPVD severity score was 3.05. NCM-ELISA detected sweet potato feathery mottle virus (SPFMV, 30.54%), sweet potato mild mottle virus (SPMMV, 31.14%), sweet potato mild speckling virus (SPMSV, 16.17%), sweet potato C-6 virus (SPC6V, 13.77%), sweet potato chlorotic stunt virus (SPCSV, 22.16%), sweet potato collusive virus (SPCV, 30.54%), sweet potato virus G (SPVG, 11.38%), cucumber mosaic virus (CMV, 7.78%) either in single or mixed infections. Data from this study indicate a significant SPVD occurrence in the country, and the consequence implications towards national sweetpotato seed system.
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publishDate 2021
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spelling CGSpace1147172024-11-14T08:04:09Z Incidence and distribution of Sweetpotato viruses and their implication on sweetpotato seed system in Malawi Mbewe, W. Mtonga, A. Chiipanthenga, M. Masamba, Kingsley Chitedze, G. Pamkomera, P. Gondwe, E. Mwenye, O. Chipungu, Felistus P. sweet potatoes viroses potyvirus crinivirus A survey was carried out in 19 districts to investigate the prevalence and distribution of sweetpotato virus disease (SPVD) and its implication on the sustainability of clean seed system in Malawi. A total of 166 leaf samples were collected and tested for the presence of 8 viruses using nitrocellulose membrane enzyme-linked immunosorbent assay (NCM-ELISA). SPVD foliar symptoms were observed in 68.42% of the surveyed districts. There were significant variations in disease incidence and severity (p < 0.001) among districts, with the highest incidence in Mulanje (28.34%). Average SPVD severity score was 3.05. NCM-ELISA detected sweet potato feathery mottle virus (SPFMV, 30.54%), sweet potato mild mottle virus (SPMMV, 31.14%), sweet potato mild speckling virus (SPMSV, 16.17%), sweet potato C-6 virus (SPC6V, 13.77%), sweet potato chlorotic stunt virus (SPCSV, 22.16%), sweet potato collusive virus (SPCV, 30.54%), sweet potato virus G (SPVG, 11.38%), cucumber mosaic virus (CMV, 7.78%) either in single or mixed infections. Data from this study indicate a significant SPVD occurrence in the country, and the consequence implications towards national sweetpotato seed system. 2021-08 2021-08-23T04:49:31Z 2021-08-23T04:49:31Z Journal Article https://hdl.handle.net/10568/114717 en Open Access Springer Mbewe, W., Mtonga, A., Chiipanthenga, M., Masamba, K., Chitedze, G., Pamkomera, P., Gondwe, E., Mwenye, O., & Chipungu, F. (2021). Incidence and distribution of Sweetpotato viruses and their implication on sweetpotato seed system in Malawi. Journal of Plant Pathology. ISSN 2239-7264. 103(3). 961–968.
spellingShingle sweet potatoes
viroses
potyvirus
crinivirus
Mbewe, W.
Mtonga, A.
Chiipanthenga, M.
Masamba, Kingsley
Chitedze, G.
Pamkomera, P.
Gondwe, E.
Mwenye, O.
Chipungu, Felistus P.
Incidence and distribution of Sweetpotato viruses and their implication on sweetpotato seed system in Malawi
title Incidence and distribution of Sweetpotato viruses and their implication on sweetpotato seed system in Malawi
title_full Incidence and distribution of Sweetpotato viruses and their implication on sweetpotato seed system in Malawi
title_fullStr Incidence and distribution of Sweetpotato viruses and their implication on sweetpotato seed system in Malawi
title_full_unstemmed Incidence and distribution of Sweetpotato viruses and their implication on sweetpotato seed system in Malawi
title_short Incidence and distribution of Sweetpotato viruses and their implication on sweetpotato seed system in Malawi
title_sort incidence and distribution of sweetpotato viruses and their implication on sweetpotato seed system in malawi
topic sweet potatoes
viroses
potyvirus
crinivirus
url https://hdl.handle.net/10568/114717
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