Efficacy of fungicides against peanut smut in Argentina
Peanut smut, caused by Thecaphora frezii, increased its incidence and prevalence in the main growing region of Argentina in the last decade becoming the main peanut disease. Despite this fact, growers continue producing peanut without any disease management strategy, which is leading to a local accu...
| Main Authors: | , , , , , |
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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Elsevier
2020
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| Online Access: | http://hdl.handle.net/20.500.12123/8053 https://www.sciencedirect.com/science/article/abs/pii/S0261219420303367 https://doi.org/10.1016/j.cropro.2020.105403 |
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| author | Paredes, Juan Andrés Cazon, Luis Ignacio Oddino, Claudio Monguillot, Joaquin Humberto Rago, Alejandro Mario Edwards Molina, Juan Pablo |
| author_browse | Cazon, Luis Ignacio Edwards Molina, Juan Pablo Monguillot, Joaquin Humberto Oddino, Claudio Paredes, Juan Andrés Rago, Alejandro Mario |
| author_facet | Paredes, Juan Andrés Cazon, Luis Ignacio Oddino, Claudio Monguillot, Joaquin Humberto Rago, Alejandro Mario Edwards Molina, Juan Pablo |
| author_sort | Paredes, Juan Andrés |
| collection | INTA Digital |
| description | Peanut smut, caused by Thecaphora frezii, increased its incidence and prevalence in the main growing region of Argentina in the last decade becoming the main peanut disease. Despite this fact, growers continue producing peanut without any disease management strategy, which is leading to a local accumulation of T. frezii inoculum. The goal of the present study was to assess the efficacy of 12 fungicides in controlling T. frezii. For this purpose, in vitro assays, pot, and field experiments were performed during 2014/15 and 2015/16. In vitro assays classified the fungicides regarding their capacity to inhibit T. frezii mycelium growth as: thiophanate-methyl – not fungitoxic (EC50 > 100); mancozeb – moderately fungitoxic (EC50 = 6.28); difenoconazole, propiconazole, cyproconazole, tebuconazole, picoxystrobin, azoxystrobin, kresoxim-methyl, pyraclostrobin, penthiopyrad, and chlorothalonil – highly fungitoxic (EC50 < 0.1). Azoxystrobin showed the highest control levels in pot experiments: 58.9% (2014/15) and 92% (2015/16). The greatest control efficiency in field experiments was observed for cyproconazole in 2015 and azoxystrobin in 2016, reducing peanut smut by 47.7% and 39.5%, respectively. Based on our results, chemical control can be considered as a moderately efficient practice which may complement the cultivar genetic resistance and cultural practices in an integrated approach for managing peanut smut. |
| format | info:ar-repo/semantics/artículo |
| id | INTA8053 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA80532020-10-14T15:09:28Z Efficacy of fungicides against peanut smut in Argentina Paredes, Juan Andrés Cazon, Luis Ignacio Oddino, Claudio Monguillot, Joaquin Humberto Rago, Alejandro Mario Edwards Molina, Juan Pablo Chemical Control Plant Diseases Diseases Control Arachis Hypogaea Argentina Enfermedades de las Plantas Control Químico Control de Enfermedades Thecaphora Frezii Maní In Vitro Sensitivity Peanut Peanut Disease Peanut smut, caused by Thecaphora frezii, increased its incidence and prevalence in the main growing region of Argentina in the last decade becoming the main peanut disease. Despite this fact, growers continue producing peanut without any disease management strategy, which is leading to a local accumulation of T. frezii inoculum. The goal of the present study was to assess the efficacy of 12 fungicides in controlling T. frezii. For this purpose, in vitro assays, pot, and field experiments were performed during 2014/15 and 2015/16. In vitro assays classified the fungicides regarding their capacity to inhibit T. frezii mycelium growth as: thiophanate-methyl – not fungitoxic (EC50 > 100); mancozeb – moderately fungitoxic (EC50 = 6.28); difenoconazole, propiconazole, cyproconazole, tebuconazole, picoxystrobin, azoxystrobin, kresoxim-methyl, pyraclostrobin, penthiopyrad, and chlorothalonil – highly fungitoxic (EC50 < 0.1). Azoxystrobin showed the highest control levels in pot experiments: 58.9% (2014/15) and 92% (2015/16). The greatest control efficiency in field experiments was observed for cyproconazole in 2015 and azoxystrobin in 2016, reducing peanut smut by 47.7% and 39.5%, respectively. Based on our results, chemical control can be considered as a moderately efficient practice which may complement the cultivar genetic resistance and cultural practices in an integrated approach for managing peanut smut. Instituto de Patología Vegetal Fil: Paredes, Juan Andrés. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Fitopatología y Modelización Agrícola (UFYMA); Argentina Fil: Cazón, Luis Ignacio. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Fitopatología y Modelización Agrícola (UFYMA); Argentina. Universidade Federal de Viçosa. Departamento de Fitopatologia; Brasil Fil: Oddino, Claudio. Universidad Nacional de Río Cuarto. Facultad de Agronomía y Veterinaria. Consejo Nacional de Investigaciones Cientificas Técnicas. Instituto de de Micología y Micotoxicología (IMICO); Argentina Fil: Monguillot, Joaquin Humberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Fitopatología y Modelización Agrícola (UFYMA); Argentina Fil: Rago, Alejandro Mario.Instituto Nacional de Tecnología Agropecuaria (INTA). Centro de Investigaciones Agropecuarias; Argentina. Universidad Nacional de Río Cuarto. Facultad de Agronomía y Veterinaria. Consejo Nacional de Investigaciones Cientificas Técnicas. Instituto de de Micología y Micotoxicología (IMICO); Argentina Fil: Edwards Molina, Juan Pablo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina 2020-10-14T14:57:23Z 2020-10-14T14:57:23Z 2020-09-28 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/8053 https://www.sciencedirect.com/science/article/abs/pii/S0261219420303367 0261-2194 https://doi.org/10.1016/j.cropro.2020.105403 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Crop Protection 140 : 105403 (February 2021) |
| spellingShingle | Chemical Control Plant Diseases Diseases Control Arachis Hypogaea Argentina Enfermedades de las Plantas Control Químico Control de Enfermedades Thecaphora Frezii Maní In Vitro Sensitivity Peanut Peanut Disease Paredes, Juan Andrés Cazon, Luis Ignacio Oddino, Claudio Monguillot, Joaquin Humberto Rago, Alejandro Mario Edwards Molina, Juan Pablo Efficacy of fungicides against peanut smut in Argentina |
| title | Efficacy of fungicides against peanut smut in Argentina |
| title_full | Efficacy of fungicides against peanut smut in Argentina |
| title_fullStr | Efficacy of fungicides against peanut smut in Argentina |
| title_full_unstemmed | Efficacy of fungicides against peanut smut in Argentina |
| title_short | Efficacy of fungicides against peanut smut in Argentina |
| title_sort | efficacy of fungicides against peanut smut in argentina |
| topic | Chemical Control Plant Diseases Diseases Control Arachis Hypogaea Argentina Enfermedades de las Plantas Control Químico Control de Enfermedades Thecaphora Frezii Maní In Vitro Sensitivity Peanut Peanut Disease |
| url | http://hdl.handle.net/20.500.12123/8053 https://www.sciencedirect.com/science/article/abs/pii/S0261219420303367 https://doi.org/10.1016/j.cropro.2020.105403 |
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