Biocontrol strategies to reduce the impact of Septoria tritici blotch in wheat
Trichoderma strains are used as biofungicides for some plant diseases. The aim of this research was to evaluate the effectiveness of Trichoderma harzianum isolates, applied alone and in combination with fungicides, to control Zymoseptoria tritici, the causal agent of Septoria tritici blotch of wheat, and their impact on wheat yield and its components. To this end, field experiments were performed in 2010 and 2011 and 10 different treatments were applied. The disease severity was assessed by visual estimation of the leaf area affected by Z. tritici at the first node, anthesis and early dough growth stages. The best results for reducing the area under the disease progress curve (AUDPC) were “coated seed only with T. harzianum” and “coated seed plus two foliar application of T. harzianum”. Regarding the increase in yield gain and the improvement of yield components, the fungicide treatment applied at seedling, and tillering in 2011 provided significant increase. Respect the treatments with the application of T. harzianum the best was only one application as coated seed of the biocontroler alone showing yield responses similar to the ones obtained with the fungicide treatments. We recommended the coated seed alone because the protective effect lasts until the early dough stage of ripening. This application produced a comparable yield to that obtained with three applications of T. harzianum at different phenological stages of wheat with as well as with more than one application of commercial fungicide. We found a strong relationship between the number of kernels per spike and the wheat yield in 2011 as a consequence of the best environmental conditions for the disease’s occurrence. Contrary, it was shown a non-significant association between thousand kernel weight (TKW) and the wheat yield.
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Facultad de Ciencias Agrarias y Forestales de la Universidad Nacional de La Plata
2020
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Cordo, Cristina Altamirano, Rodrigo Simón, María Rosa Stocco, Marina Lampugnani, Gladys Abramoff, Cecilia Kripelz, Natalia Mónaco, Cecilia |
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Cordo, Cristina Altamirano, Rodrigo Simón, María Rosa Stocco, Marina Lampugnani, Gladys Abramoff, Cecilia Kripelz, Natalia Mónaco, Cecilia Biocontrol strategies to reduce the impact of Septoria tritici blotch in wheat |
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Cordo, Cristina Altamirano, Rodrigo Simón, María Rosa Stocco, Marina Lampugnani, Gladys Abramoff, Cecilia Kripelz, Natalia Mónaco, Cecilia |
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Cordo, Cristina |
| title |
Biocontrol strategies to reduce the impact of Septoria tritici blotch in wheat |
| title_short |
Biocontrol strategies to reduce the impact of Septoria tritici blotch in wheat |
| title_full |
Biocontrol strategies to reduce the impact of Septoria tritici blotch in wheat |
| title_fullStr |
Biocontrol strategies to reduce the impact of Septoria tritici blotch in wheat |
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Biocontrol strategies to reduce the impact of Septoria tritici blotch in wheat |
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biocontrol strategies to reduce the impact of septoria tritici blotch in wheat |
| description |
Trichoderma strains are used as biofungicides for some plant diseases. The aim of this research was to evaluate the effectiveness of Trichoderma harzianum isolates, applied alone and in combination with fungicides, to control Zymoseptoria tritici, the causal agent of Septoria tritici blotch of wheat, and their impact on wheat yield and its components. To this end, field experiments were performed in 2010 and 2011 and 10 different treatments were applied. The disease severity was assessed by visual estimation of the leaf area affected by Z. tritici at the first node, anthesis and early dough growth stages. The best results for reducing the area under the disease progress curve (AUDPC) were “coated seed only with T. harzianum” and “coated seed plus two foliar application of T. harzianum”. Regarding the increase in yield gain and the improvement of yield components, the fungicide treatment applied at seedling, and tillering in 2011 provided significant increase. Respect the treatments with the application of T. harzianum the best was only one application as coated seed of the biocontroler alone showing yield responses similar to the ones obtained with the fungicide treatments. We recommended the coated seed alone because the protective effect lasts until the early dough stage of ripening. This application produced a comparable yield to that obtained with three applications of T. harzianum at different phenological stages of wheat with as well as with more than one application of commercial fungicide. We found a strong relationship between the number of kernels per spike and the wheat yield in 2011 as a consequence of the best environmental conditions for the disease’s occurrence. Contrary, it was shown a non-significant association between thousand kernel weight (TKW) and the wheat yield. |
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Facultad de Ciencias Agrarias y Forestales de la Universidad Nacional de La Plata |
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2020 |
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https://revistas.unlp.edu.ar/revagro/article/view/10929 |
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rev-revagro-ar-article-109292021-06-14T16:22:00Z Biocontrol strategies to reduce the impact of Septoria tritici blotch in wheat Estrategias de control para reducir el impacto de la mancha de la hoja del trigo Cordo, Cristina Altamirano, Rodrigo Simón, María Rosa Stocco, Marina Lampugnani, Gladys Abramoff, Cecilia Kripelz, Natalia Mónaco, Cecilia biological control septoria tritici blotch Trichoderma harzianum wheat yield fungicide control biológico septoria tritici blotch Trichoderma harzianum rendimiento del trigo fungicidas Trichoderma strains are used as biofungicides for some plant diseases. The aim of this research was to evaluate the effectiveness of Trichoderma harzianum isolates, applied alone and in combination with fungicides, to control Zymoseptoria tritici, the causal agent of Septoria tritici blotch of wheat, and their impact on wheat yield and its components. To this end, field experiments were performed in 2010 and 2011 and 10 different treatments were applied. The disease severity was assessed by visual estimation of the leaf area affected by Z. tritici at the first node, anthesis and early dough growth stages. The best results for reducing the area under the disease progress curve (AUDPC) were “coated seed only with T. harzianum” and “coated seed plus two foliar application of T. harzianum”. Regarding the increase in yield gain and the improvement of yield components, the fungicide treatment applied at seedling, and tillering in 2011 provided significant increase. Respect the treatments with the application of T. harzianum the best was only one application as coated seed of the biocontroler alone showing yield responses similar to the ones obtained with the fungicide treatments. We recommended the coated seed alone because the protective effect lasts until the early dough stage of ripening. This application produced a comparable yield to that obtained with three applications of T. harzianum at different phenological stages of wheat with as well as with more than one application of commercial fungicide. We found a strong relationship between the number of kernels per spike and the wheat yield in 2011 as a consequence of the best environmental conditions for the disease’s occurrence. Contrary, it was shown a non-significant association between thousand kernel weight (TKW) and the wheat yield. Las cepas de Trichoderma se usan como biofungicidas para el control de algunas enfermedades de las plantas. El objetivo de esta investigación fue evaluar la efectividad de dos cepas de Trichoderma harzianum, aplicadas solas y en combinación con fungicidas, para controlar Zymoseptoria tritici, el agente causal de la mancha de la hoja del trigo, y su impacto en el rendimiento del trigo y sus componentes. Con este fin, se realizaron experimentos de campo en 2010 y 2011 y se aplicaron 10 tratamientos diferentes. La severidad de la enfermedad se evaluó mediante la estimación visual del área de la hoja afectada por Z. tritici en el estadio de primer nudo, en antesis y en grano pastoso. Los mejores resultados para la reducción del área bajo la curva de progreso de la enfermedad (ABCPE) fueron "semillas recubiertas solamente con T. harzianum" y "semillas recubiertas más dos aplicaciones foliares de T. harzianum". Para un mayor rendimiento y la mejora de los componentes de rendimiento, el mejor tratamiento fue: solo una aplicación de T. harzianum (como “semillas recubiertas”). Recomendamos este tratamiento porque el efecto protector dura hasta la etapa temprana de maduración del grano. Esta aplicación produjo un rendimiento comparable al obtenido con tres aplicaciones de T. harzianum en diferentes estados fenológicos del trigo y, además de con más de una aplicación de fungicida comercial. Existió una relación significativa entre el número de granos por espiga y el rendimiento de trigo en 2011, como consecuencia de las mejores condiciones ambientales para el desarrollo de la enfermedad. Por el contrario, se mostró una asociación no significativa con el peso de mil granos. Facultad de Ciencias Agrarias y Forestales de la Universidad Nacional de La Plata 2020-12-07 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo evaluado por pares Peer reviewed article application/pdf https://revistas.unlp.edu.ar/revagro/article/view/10929 10.24215/16699513e060 Journal of the Agronomy College; Vol. 119 No. 2 (2020): Revista de la Facultad de Agronomía; 060 Revista de la Facultad de Agronomía; Vol. 119 Núm. 2 (2020): Revista de la Facultad de Agronomía; 060 Journal de la Faculté d'Agronomie; Vol. 119 No. 2 (2020): Revista de la Facultad de Agronomía; 060 Revista da Faculdade de Agronomia; v. 119 n. 2 (2020): Revista de la Facultad de Agronomía; 060 1669-9513 0041-8676 eng https://revistas.unlp.edu.ar/revagro/article/view/10929/11051 |