Phytophthora and Phytopythium species associated with walnut dieback in plantations of northern Patagonia, Argentina
The walnut industry in Argentina has grown in recent years, especially in northern Patagonia. However, this expansion has also brought new challenges, including the emergence of diseases threatening the health and productivity of walnut plantations. One of the most important diseases affecting walnu...
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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Wiley
2024
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| Online Access: | http://hdl.handle.net/20.500.12123/18084 https://bsppjournals.onlinelibrary.wiley.com/doi/10.1111/ppa.13922 https://doi.org/10.1111/ppa.13922 |
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| author | Marfetan, Jorge Ariel Fernandez, Diana Gallo, Ana Laura Vélez, María Laura |
| author_browse | Fernandez, Diana Gallo, Ana Laura Marfetan, Jorge Ariel Vélez, María Laura |
| author_facet | Marfetan, Jorge Ariel Fernandez, Diana Gallo, Ana Laura Vélez, María Laura |
| author_sort | Marfetan, Jorge Ariel |
| collection | INTA Digital |
| description | The walnut industry in Argentina has grown in recent years, especially in northern Patagonia. However, this expansion has also brought new challenges, including the emergence of diseases threatening the health and productivity of walnut plantations. One of the most important diseases affecting walnut crops worldwide is ‘ink disease’ or ‘walnut dieback'. The aim of this study was to characterize ink disease, identify the aetiological agents, and estimate its incidence in walnut orchards of northern
Patagonia, Argentina. Symptomatic trees were observed in the seven surveyed wal nut orchards, showing a range of symptoms, including chlorosis and wilting, stem cankers and desiccation. In vivo assay and molecular analyses revealed that not only
Phytophthora (P.) but also Phytopythium (Ph.) species are the causal agents of the dis ease, with P. drechsleri, Ph. mercuriale and Ph. vexans being the most virulent over the commonly used rootstock Juglans hindsii. Notably, Ph. vexans was the most fre quently isolated pathogen, suggesting its prevalence and potential impact on the re gional walnut industry. Overall, this study provides critical insights into the prevalence and impact of Phytophthora and Phytopythium species on walnut health in northern Patagonia. The presence of multiple pathogenic oomycete species raises concerns about the health of walnut orchards, as well as the potential risk of pathogen trans mission to other fruit crops in the region. The findings will help growers to develop better cultural practices and implement measures to guarantee the sustainability of the walnut industry in Patagonia. |
| format | info:ar-repo/semantics/artículo |
| id | INTA18084 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | INTA180842024-06-10T10:09:12Z Phytophthora and Phytopythium species associated with walnut dieback in plantations of northern Patagonia, Argentina Marfetan, Jorge Ariel Fernandez, Diana Gallo, Ana Laura Vélez, María Laura Plant Diseases Walnuts Phytophthora Phylogeny Rootstocks Enfermedades de las Plantas Nuez Juglans regia Filogenia Portainjertos Argentina Ink Disease Plant Pathogens Enfermedad de la Tinta Patógenos Vegetales Phytopythium Juglans hindsii Región Patagónica The walnut industry in Argentina has grown in recent years, especially in northern Patagonia. However, this expansion has also brought new challenges, including the emergence of diseases threatening the health and productivity of walnut plantations. One of the most important diseases affecting walnut crops worldwide is ‘ink disease’ or ‘walnut dieback'. The aim of this study was to characterize ink disease, identify the aetiological agents, and estimate its incidence in walnut orchards of northern Patagonia, Argentina. Symptomatic trees were observed in the seven surveyed wal nut orchards, showing a range of symptoms, including chlorosis and wilting, stem cankers and desiccation. In vivo assay and molecular analyses revealed that not only Phytophthora (P.) but also Phytopythium (Ph.) species are the causal agents of the dis ease, with P. drechsleri, Ph. mercuriale and Ph. vexans being the most virulent over the commonly used rootstock Juglans hindsii. Notably, Ph. vexans was the most fre quently isolated pathogen, suggesting its prevalence and potential impact on the re gional walnut industry. Overall, this study provides critical insights into the prevalence and impact of Phytophthora and Phytopythium species on walnut health in northern Patagonia. The presence of multiple pathogenic oomycete species raises concerns about the health of walnut orchards, as well as the potential risk of pathogen trans mission to other fruit crops in the region. The findings will help growers to develop better cultural practices and implement measures to guarantee the sustainability of the walnut industry in Patagonia. EEA Alto Valle Fil: Marfetan, Jorge Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigación y Extensión Forestal Andino Patagónico (CIEFAP); Argentina Fil: Fernández, Diana. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle. Agencia de Extensión Rural Valle Medio; Argentina Fil: Gallo, Ana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigación y Extensión Forestal Andino Patagónico (CIEFAP); Argentina. Agencia Nacional de Promoción de la Investigación, el Desarrollo Tecnológico y la Innovación (Agencia I+D+I); Argentina. Universidad Nacional de la Patagonia San Juan Bosco; Argentina Fil: Vélez, María laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigación y Extensión Forestal Andino Patagónico (CIEFAP); Argentina. Universidad Nacional de la Patagonia San Juan Bosco; Argentina 2024-06-10T10:01:06Z 2024-06-10T10:01:06Z 2024-05 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/18084 https://bsppjournals.onlinelibrary.wiley.com/doi/10.1111/ppa.13922 1365-3059 (Online) https://doi.org/10.1111/ppa.13922 eng info:eu-repo/semantics/restrictedAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Wiley Plant Pathology 73 (5) : 1-13 (June 2024) |
| spellingShingle | Plant Diseases Walnuts Phytophthora Phylogeny Rootstocks Enfermedades de las Plantas Nuez Juglans regia Filogenia Portainjertos Argentina Ink Disease Plant Pathogens Enfermedad de la Tinta Patógenos Vegetales Phytopythium Juglans hindsii Región Patagónica Marfetan, Jorge Ariel Fernandez, Diana Gallo, Ana Laura Vélez, María Laura Phytophthora and Phytopythium species associated with walnut dieback in plantations of northern Patagonia, Argentina |
| title | Phytophthora and Phytopythium species associated with walnut dieback in plantations of northern Patagonia, Argentina |
| title_full | Phytophthora and Phytopythium species associated with walnut dieback in plantations of northern Patagonia, Argentina |
| title_fullStr | Phytophthora and Phytopythium species associated with walnut dieback in plantations of northern Patagonia, Argentina |
| title_full_unstemmed | Phytophthora and Phytopythium species associated with walnut dieback in plantations of northern Patagonia, Argentina |
| title_short | Phytophthora and Phytopythium species associated with walnut dieback in plantations of northern Patagonia, Argentina |
| title_sort | phytophthora and phytopythium species associated with walnut dieback in plantations of northern patagonia argentina |
| topic | Plant Diseases Walnuts Phytophthora Phylogeny Rootstocks Enfermedades de las Plantas Nuez Juglans regia Filogenia Portainjertos Argentina Ink Disease Plant Pathogens Enfermedad de la Tinta Patógenos Vegetales Phytopythium Juglans hindsii Región Patagónica |
| url | http://hdl.handle.net/20.500.12123/18084 https://bsppjournals.onlinelibrary.wiley.com/doi/10.1111/ppa.13922 https://doi.org/10.1111/ppa.13922 |
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