[ Respuesta de variedades de cebada a fungicidas para el control de roya de la hoja ]
Volume 39, Issue 4, June 2023, Pages 1475–1483
Miguel González González1 and María Florencia Rodríguez García2
1 Programa de cebada, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias-Campo Experimental Valle de , Coatlinchán, Texcoco, Estado de México, Mexico
2 Programa de cebada, Instituto Nacional de Investigaciones, Agrícolas y Pecuarias-Campo Experimental Valle de , Coatlinchán, Texcoco, Estado de México, Mexico
Original language: Spanish
Copyright © 2023 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
In Mexico, the production of barley (Hordeum vulgare L.) is affected by various diseases including leaf rust (LR) caused by Puccinia hordei Otth. In the spring-summer/2018 cycle, under rainfed conditions and natural incidence of HR, a factorial test was established under a randomized complete block design, in the municipalities of Texcoco and Temascalapa, State of Mexico and Tlaxco, Tlaxcala, to evaluate the effect of two fungicides (Azoxistrobin 11.1% + Tebuconazole 18.4% and Tebuconazole 25%) on the LR control in six varieties of barley. The variables measured were day to heading and maturity (DE, DM), Plant height (PH), Test weight (TW), grain yield (Yield) and final severity of the disease (FDS). Highly significant differences were found for TW, Yield and FDS for varieties, fungicides and localities (Tukey, p≤ 0.05). The most effective fungicide was Azoxistrobin 11.1% + Tebuconazole 18.4% taking FDS of 2% and yield (REND) of 2,757.2 kg ha-1 compared to the non-fungicide check which had 23% FDS and yield of 2,262.7 kg ha-1. The variety with the greatest resistance was ABI Voyager (10MS) and the most susceptible, Doña Josefa (40S). Disease control influenced performance, there were losses of 31% in Apizaco; 20% in Esmeralda; 19% for Doña Josefa and ABI Voyager; Maravilla with 16% and AC Metcalfe 9%. Resistance levels observed together with the use of fungicides will allow a comprehensive control of the disease.
Author Keywords: Decrease, Yield, Resistance.
Volume 39, Issue 4, June 2023, Pages 1475–1483
Miguel González González1 and María Florencia Rodríguez García2
1 Programa de cebada, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias-Campo Experimental Valle de , Coatlinchán, Texcoco, Estado de México, Mexico
2 Programa de cebada, Instituto Nacional de Investigaciones, Agrícolas y Pecuarias-Campo Experimental Valle de , Coatlinchán, Texcoco, Estado de México, Mexico
Original language: Spanish
Copyright © 2023 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
In Mexico, the production of barley (Hordeum vulgare L.) is affected by various diseases including leaf rust (LR) caused by Puccinia hordei Otth. In the spring-summer/2018 cycle, under rainfed conditions and natural incidence of HR, a factorial test was established under a randomized complete block design, in the municipalities of Texcoco and Temascalapa, State of Mexico and Tlaxco, Tlaxcala, to evaluate the effect of two fungicides (Azoxistrobin 11.1% + Tebuconazole 18.4% and Tebuconazole 25%) on the LR control in six varieties of barley. The variables measured were day to heading and maturity (DE, DM), Plant height (PH), Test weight (TW), grain yield (Yield) and final severity of the disease (FDS). Highly significant differences were found for TW, Yield and FDS for varieties, fungicides and localities (Tukey, p≤ 0.05). The most effective fungicide was Azoxistrobin 11.1% + Tebuconazole 18.4% taking FDS of 2% and yield (REND) of 2,757.2 kg ha-1 compared to the non-fungicide check which had 23% FDS and yield of 2,262.7 kg ha-1. The variety with the greatest resistance was ABI Voyager (10MS) and the most susceptible, Doña Josefa (40S). Disease control influenced performance, there were losses of 31% in Apizaco; 20% in Esmeralda; 19% for Doña Josefa and ABI Voyager; Maravilla with 16% and AC Metcalfe 9%. Resistance levels observed together with the use of fungicides will allow a comprehensive control of the disease.
Author Keywords: Decrease, Yield, Resistance.
Abstract: (spanish)
En México, la producción de cebada (Hordeum vulgare L.) es afectada por diversas enfermedades, entre ellas la roya de la hoja (RH) causada por Puccinia hordei Otth. En el ciclo primavera-verano 2018, bajo condiciones de temporal e incidencia natural de RH, se estableció un ensayo bajo un diseño en bloques completos al azar con arreglo factorial, en los municipios de Texcoco y Temascalapa, Estado de México y Tlaxco, Tlaxcala, para evaluar el efecto de dos fungicidas (Azoxistrobin 11.1% + Tebuconazole 18.4% y Tebuconazole 25%) en el control de RH en seis variedades de cebada. Se midieron las variables días a espigamiento y madurez (DE, DM), altura de planta (AP), peso hectolítrico (PH), rendimiento de grano (REND) y severidad final de la enfermedad (SFE). Se encontraron diferencias altamente significativas para PH, REND y SFE para variedades, fungicidas y localidades (Tukey, p≤ 0.05). El fungicida más eficaz fue Azoxistrobin 11.1% + Tebuconazole 18.4% con una SFE de 2% y rendimiento (REND) de 2,757.2 kg ha-1 en comparación con el testigo, sin fungicida, que tuvo SFE de 23% y REND de 2,262.7 kg ha-1. La variedad más resistente fue ABI Voyager (10MS) y la más susceptible, Doña Josefa (40S). El control de la enfermedad afectó el rendimiento, hubo pérdidas de 31% en Apizaco; 20% en Esmeralda; 19% para Doña Josefa y ABI Voyager; Maravilla con 16% y AC Metcalfe de 9%. Los niveles de resistencia observados junto con el uso de funguicidas permitirán un control integral de la enfermedad.
Author Keywords: Disminución, Rendimiento, Resistencia.
How to Cite this Article
Miguel González González and María Florencia Rodríguez García, “Response of barley varieties to fungicides for the control of leaf rust,” International Journal of Innovation and Applied Studies, vol. 39, no. 4, pp. 1475–1483, June 2023.
