Association between Soil Acidity and Bacterial Wilt Occurrence in Potato Production in Ethiopia
Soil acidity is one of the main constraints to crop production worldwide. In Ethiopia, the problem of soil acidity has been increasing. Currently, more than 40% of cultivated land in the country has a soil pH < 5.5. Recently, bacterial wilt (caused by Ralstonia solanacearum) has become a serious pro...
| Autores principales: | , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
MDPI
2021
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/114707 |
| _version_ | 1855535077131288576 |
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| author | Tafesse, S. Braam, C. Mierlo, B. van Lemaga, B. Struik, Paul C. |
| author_browse | Braam, C. Lemaga, B. Mierlo, B. van Struik, Paul C. Tafesse, S. |
| author_facet | Tafesse, S. Braam, C. Mierlo, B. van Lemaga, B. Struik, Paul C. |
| author_sort | Tafesse, S. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Soil acidity is one of the main constraints to crop production worldwide. In Ethiopia, the problem of soil acidity has been increasing. Currently, more than 40% of cultivated land in the country has a soil pH < 5.5. Recently, bacterial wilt (caused by Ralstonia solanacearum) has become a serious problem, reaching epidemic levels in some of the major potato growing districts in the country. However, it is currently unknown if the current outbreak of bacterial wilt in potato production is associated with soil acidification or not. To examine the association between bacterial wilt and soil acidification, we conducted a field survey and field experiments and detected and characterised R. solanacearum strains. The study showed that 50% of potato fields were very strongly acidic (pH 4.5–5.0) and bacterial wilt incidence was higher in potato fields with low soil pH. The field experiments indicated that lime application significantly increased soil pH (p < 0.001) and reduced bacterial wilt incidence (p < 0.001). The more lime was applied, the stronger the positive effect on soil pH and the stronger the reduction in bacterial wilt incidence. Bacterial wilt incidence was on average 10.8% under 12 t/ha lime application, while it was about 40% in control plots (without lime) after 90 days. All R. solanacearum strains isolated from the symptomatic potato plants were Phylotype II. Our findings show that the current outbreak of bacterial wilt in Ethiopia is associated with soil acidification. They add to the understanding of the risk factors for bacterial wilt in potato. Aside from farm hygiene, sanitation and cultural practices, addressing soil acidification using lime needs to be considered as an additional component of an integrated package to deal with bacterial wilt in potato under acidic soil conditions. |
| format | Journal Article |
| id | CGSpace114707 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | CGSpace1147072025-03-11T12:14:31Z Association between Soil Acidity and Bacterial Wilt Occurrence in Potato Production in Ethiopia Tafesse, S. Braam, C. Mierlo, B. van Lemaga, B. Struik, Paul C. genetic variation soil ph ralstonia solanacearum potatoes Soil acidity is one of the main constraints to crop production worldwide. In Ethiopia, the problem of soil acidity has been increasing. Currently, more than 40% of cultivated land in the country has a soil pH < 5.5. Recently, bacterial wilt (caused by Ralstonia solanacearum) has become a serious problem, reaching epidemic levels in some of the major potato growing districts in the country. However, it is currently unknown if the current outbreak of bacterial wilt in potato production is associated with soil acidification or not. To examine the association between bacterial wilt and soil acidification, we conducted a field survey and field experiments and detected and characterised R. solanacearum strains. The study showed that 50% of potato fields were very strongly acidic (pH 4.5–5.0) and bacterial wilt incidence was higher in potato fields with low soil pH. The field experiments indicated that lime application significantly increased soil pH (p < 0.001) and reduced bacterial wilt incidence (p < 0.001). The more lime was applied, the stronger the positive effect on soil pH and the stronger the reduction in bacterial wilt incidence. Bacterial wilt incidence was on average 10.8% under 12 t/ha lime application, while it was about 40% in control plots (without lime) after 90 days. All R. solanacearum strains isolated from the symptomatic potato plants were Phylotype II. Our findings show that the current outbreak of bacterial wilt in Ethiopia is associated with soil acidification. They add to the understanding of the risk factors for bacterial wilt in potato. Aside from farm hygiene, sanitation and cultural practices, addressing soil acidification using lime needs to be considered as an additional component of an integrated package to deal with bacterial wilt in potato under acidic soil conditions. 2021-07-31 2021-08-20T06:26:26Z 2021-08-20T06:26:26Z Journal Article https://hdl.handle.net/10568/114707 en Open Access MDPI Tafesse, S., Braam, C., van Mierlo, B., Lemaga, B., & Struik, P. C. (2021). Association between Soil Acidity and Bacterial Wilt Occurrence in Potato Production in Ethiopia. Agronomy. ISSN 2073-4395. 11(8), 1541. |
| spellingShingle | genetic variation soil ph ralstonia solanacearum potatoes Tafesse, S. Braam, C. Mierlo, B. van Lemaga, B. Struik, Paul C. Association between Soil Acidity and Bacterial Wilt Occurrence in Potato Production in Ethiopia |
| title | Association between Soil Acidity and Bacterial Wilt Occurrence in Potato Production in Ethiopia |
| title_full | Association between Soil Acidity and Bacterial Wilt Occurrence in Potato Production in Ethiopia |
| title_fullStr | Association between Soil Acidity and Bacterial Wilt Occurrence in Potato Production in Ethiopia |
| title_full_unstemmed | Association between Soil Acidity and Bacterial Wilt Occurrence in Potato Production in Ethiopia |
| title_short | Association between Soil Acidity and Bacterial Wilt Occurrence in Potato Production in Ethiopia |
| title_sort | association between soil acidity and bacterial wilt occurrence in potato production in ethiopia |
| topic | genetic variation soil ph ralstonia solanacearum potatoes |
| url | https://hdl.handle.net/10568/114707 |
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