Salicylic acid and Bacillus subtilis as control of early blight (Alternaria solani) in tomato plants (Solanum lycopersicum)

Alternaria solani is the causal agent of early blight disease in tomatoes (Solanum lycopersicum) and every year is responsible for significant economic losses suffered worldwide by the producers of this crop. Since salicylic acid and Bacillus subtilis are resistance-inducing agents in plants, they were evaluated in order to know their effect on the infection caused by early blight in the tomato crop. Plants of 75 days old were transplanted in furrows 8 m wide by 43.2 m long, the exogenous application of treatments were made, growth variables (plant height and stem diameter), yield (total fruits) and damage in tomato plants were evaluated. The results show significant statistical differences between treatments compared with the control (P≤0.000). B. subtilis applied to the root and salicylic acid applied to the foliage, reduced the severity of A. solani in tomato plants, and caused a significant increment in the crop growth and yield. The use of resistance inducers can represent an alternative of sustainable production and efficient control against pathogens, aimed at reducing the use of agrochemicals and production costs.Alternaria solani is the causal agent of early blight disease in tomatoes (Solanum lycopersicum) and every year is responsible for significant economic losses suffered worldwide by the producers of this crop. Since salicylic acid and Bacillus subtilis are resistance-inducing agents in plants, they were evaluated in order to know their effect on the infection caused by early blight in the tomato crop. Plants of 75 days old were transplanted in furrows 8 m wide by 43.2 m long, the exogenous application of treatments were made, growth variables (plant height and stem diameter), yield (total fruits) and damage in tomato plants were evaluated. The results show significant statistical differences between treatments compared with the control (P≤0.000). B. subtilis applied to the root and salicylic acid applied to the foliage, reduced the severity of A. solani in tomato plants, and caused a significant increment in the crop growth and yield. The use of resistance inducers can represent an alternative of sustainable production and efficient control against pathogens, aimed at reducing the use of agrochemicals and production costs

Ácido salicílico y Bacillus subtilis como control del tizón temprano (Alternaria solani) en plantas de tomate (Solanum lycopersicum)

Alternaria solani is the causal agent of early blight disease in tomatoes (Solanum lycopersicum) and every year is responsible for significant economic losses suffered worldwide by the producers of this crop. Since salicylic acid and Bacillus subtilis are resistance-inducing agents in plants, they were evaluated in order to know their effect on the infection caused by early blight in the tomato crop. Plants of 75 days old were transplanted in furrows 8 m wide by 43.2 m long, the exogenous application of treatments were made, growth variables (plant height and stem diameter), yield (total fruits) and damage in tomato plants were evaluated. The results show significant statistical differences between treatments compared with the control (P≤0.000). B. subtilis applied to the root and salicylic acid applied to the foliage, reduced the severity of A. solani in tomato plants, and caused a significant increment in the crop growth and yield. The use of resistance inducers can represent an alternative of sustainable production and efficient control against pathogens, aimed at reducing the use of agrochemicals and production costs.Alternaria solani es el agente causal de la enfermedad del tizón temprano en el tomate (Solanum lycopersicum) y cada año es responsable de pérdidas económicas significativas sufridas por los productores de este cultivo a nivel mundial. Debido a que el ácido salicílico y Bacillus subtilis, son agentes inductores de resistencia en las plantas, estos fueron evaluados con la finalidad de conocer su efecto en la infección causada por el tizón temprano en el cultivo de tomate. Plantas de 75 días de edad se trasplantaron en surcos de 8 m de ancho por 43,2 m de largo, se realizó la aplicación exógena de los tratamientos, se evaluaron variables de crecimiento (altura de la planta y diámetro del tallo), rendimiento (frutos totales) y daño en plantas de tomate. Los resultados muestran que existen diferencias estadísticas significativas entre los tratamientos comparados con el testigo (P≤0,000). B. subtilis aplicado a la raíz y ácido salicílico aplicado al follaje, redujo la severidad de A. solani en plantas de tomate, al mismo tiempo que causó un incremento significativo en el crecimiento y rendimiento del cultivo. La utilización de inductores de resistencia puede representar una alternativa de producción sustentable y eficiente para el control de patógenos, a fin de reducir el uso de agroquímicos y los costos de producción. Palabras clave inductores de resistencia • Alternaria solani • producción sustentableFil: Espinosa-Vázquez, Miguel Ángel. Universidad de Ciencias y Artes de Chiapas (México). Facultad de Ingeniería. Maestría en Ciencias en Desarrollo Sustentable y Gestión de RiesgosFil: Espinoza-Medinilla, Eduardo Estanislao. Universidad de Ciencias y Artes de Chiapas (México). Facultad de Ingeniería. Maestría en Ciencias en Desarrollo Sustentable y Gestión de RiesgosFil: Orantes-García, Carolina. Universidad de Ciencias y Artes de Chiapas. Instituto de Ciencias BiológicasFil: Garrido-Ramírez, Eduardo. Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (México)Fil: Rioja-Paradela, Tamara Mila. Universidad de Ciencias y Artes de Chiapas (México). Facultad de Ingeniería. Maestría en Ciencias en Desarrollo Sustentable y Gestión de Riesgo