Efecto de inductores de resistencia sobre Rhizoctonia solani en el cultivo de arroz en la zona de Babahoyo – Ecuador
| dc.contributor.advisor | Goyes Cabezas, Miguel Ángel | |
| dc.contributor.author | Vecilla Nicola, Luis Pedro | |
| dc.date.accessioned | 2025-08-18T16:38:17Z | |
| dc.date.available | 2025-08-18T16:38:17Z | |
| dc.date.issued | 2025 | |
| dc.identifier.uri | http://dspace.utb.edu.ec/handle/49000/18667 | |
| dc.description | The present study aimed to evaluate the effect of resistance inducers on R. solani, the causal agent of sheath blight, in rice crops in the Babahoyo area, Ecuador. Two commercial varieties (IMPACTO and SFL-11) and six treatments were used, including salicylic acid (SA) at two doses (2.0 and 3.0 L/ha), fosetyl-aluminum (0.75 and 1.00 kg/ha), a chemical fungicide (propiconazole + tebuconazole), and a control without application. The experimental design was randomized complete blocks with an A × B factorial arrangement and three replications. The results showed that salicylic acid at 3.0 L/ha was the most effective treatment, achieving a significant reduction in the incidence (5.67%) and severity (5.67%) of the disease, with a control efficacy of 81.48%. In addition, this treatment significantly improved agronomic parameters such as plant height, number of tillers and panicles, 1000-grain weight and yield (8023.33 kg/ha in the IMPACTO variety). Fosetyl aluminum also reduced disease incidence and severity, although with less efficacy (up to 64.01%). The control variety without application recorded the highest incidence (31.33%) and severity (30.5%) values, as well as the lowest yield (6558.33 kg/ha). No significant differences were detected between varieties regarding disease incidence and severity, but there were differences in productive traits, where IMPACTO outperformed SFL-11 in yield. The economic analysis revealed that the highest net benefit was achieved with AS treatment at 3.0 L/ha in the IMPACTO variety, generating $3633.53/ha. This study concludes that the use of inducers such as salicylic acid constitutes a viable, effective, and sustainable alternative for the integrated management of R. solani in rice, reducing dependence on chemical fungicides and promoting sustainable and profitable cultivation. | es_ES |
| dc.description | The present study aimed to evaluate the effect of resistance inducers on R. solani, the causal agent of sheath blight, in rice crops in the Babahoyo area, Ecuador. Two commercial varieties (IMPACTO and SFL-11) and six treatments were used, including salicylic acid (SA) at two doses (2.0 and 3.0 L/ha), fosetyl-aluminum (0.75 and 1.00 kg/ha), a chemical fungicide (propiconazole + tebuconazole), and a control without application. The experimental design was randomized complete blocks with an A × B factorial arrangement and three replications. The results showed that salicylic acid at 3.0 L/ha was the most effective treatment, achieving a significant reduction in the incidence (5.67%) and severity (5.67%) of the disease, with a control efficacy of 81.48%. In addition, this treatment significantly improved agronomic parameters such as plant height, number of tillers and panicles, 1000-grain weight and yield (8023.33 kg/ha in the IMPACTO variety). Fosetyl aluminum also reduced disease incidence and severity, although with less efficacy (up to 64.01%). The control variety without application recorded the highest incidence (31.33%) and severity (30.5%) values, as well as the lowest yield (6558.33 kg/ha). No significant differences were detected between varieties regarding disease incidence and severity, but there were differences in productive traits, where IMPACTO outperformed SFL-11 in yield. The economic analysis revealed that the highest net benefit was achieved with AS treatment at 3.0 L/ha in the IMPACTO variety, generating $3633.53/ha. This study concludes that the use of inducers such as salicylic acid constitutes a viable, effective, and sustainable alternative for the integrated management of R. solani in rice, reducing dependence on chemical fungicides and promoting sustainable and profitable cultivation. | es_ES |
| dc.description.abstract | El presente estudio tuvo como objetivo evaluar el efecto de inductores de resistencia sobre R. solani, agente causal del tizón de la vaina, en el cultivo de arroz en la zona de Babahoyo, Ecuador. Se utilizaron dos variedades comerciales (IMPACTO y SFL-11) y seis tratamientos, incluyendo ácido salicílico (AS) a dos dosis (2.0 y 3.0 l/ha), fosetil-aluminio (0.75 y 1.00 kg/ha), un fungicida químico (propiconazol + tebuconazol) y un testigo sin aplicación. El diseño experimental fue bloques completos al azar con arreglo factorial A×B y tres repeticiones. Los resultados mostraron que el ácido salicílico a 3.0 l/ha fue el tratamiento más eficaz, logrando una reducción significativa en la incidencia (5.67 %) y severidad (5.67 %) de la enfermedad, con una eficacia de control de 81.48 %. Además, este tratamiento mejoró significativamente parámetros agronómicos como altura de planta, número de macollos y panículas, peso de 1000 granos y rendimiento (8023.33 kg/ha en la variedad IMPACTO). El fosetil-aluminio también redujo la incidencia y severidad de la enfermedad, aunque con menor eficacia (hasta 64.01 %). El testigo sin aplicación registró los valores más altos de incidencia (31.33 %) y severidad (30.5%), además del menor rendimiento (6558.33 kg/ha). No se detectaron diferencias significativas entre variedades respecto a la incidencia y severidad de la enfermedad, pero sí en características productivas, donde IMPACTO superó a SFL-11 en rendimiento. El análisis económico reveló que el mayor beneficio neto se alcanzó con el tratamiento de AS a 3.0 l/ha en la variedad IMPACTO, generando $3633.53/ha. Este estudio concluye que el uso de inductores como el ácido salicílico constituye una alternativa viable, eficaz y sostenible para el manejo integrado de R. solani en arroz, reduciendo la dependencia de fungicidas químicos y promoviendo un cultivo sustentable y rentable. | es_ES |
| dc.format.extent | 21 p. | es_ES |
| dc.language.iso | es | es_ES |
| dc.publisher | BABAHOYO: UTB, 2025 | es_ES |
| dc.rights | Attribution-NonCommercial-NoDerivs 3.0 United States | * |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/us/ | * |
| dc.subject | Acido salicílico | es_ES |
| dc.subject | Fosetil-aluminio | es_ES |
| dc.subject | R. Solani | es_ES |
| dc.subject | Incidencia | es_ES |
| dc.subject | Severidad | es_ES |
| dc.title | Efecto de inductores de resistencia sobre Rhizoctonia solani en el cultivo de arroz en la zona de Babahoyo – Ecuador | es_ES |
| dc.type | masterThesis | es_ES |
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