Sensitivity of Conyza sumatrensis biotypes to glyphosate and ALS-inhibiting herbicides at two growth stages.
Conyza sumatrensis is one of the most problematic weeds in Argentina, withfrequent control failures after glyphosate application. The objective of this research was to evaluate sensitivity of C. sumatrensis biotypes, at two growth stages (rosette and vegetative), to glyphosate and acetolactate synth...
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Format: | Online |
Language: | spa |
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Facultad de Ciencias Agropecuarias
2020
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Online Access: | https://revistas.unc.edu.ar/index.php/agris/article/view/25404 |
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author | Balassone, Federico Puricelli, Eduardo Faccini, Delma |
author_facet | Balassone, Federico Puricelli, Eduardo Faccini, Delma |
author_sort | Balassone, Federico |
collection | Portal de Revistas |
description | Conyza sumatrensis is one of the most problematic weeds in Argentina, withfrequent control failures after glyphosate application. The objective of this research was to evaluate sensitivity of C. sumatrensis biotypes, at two growth stages (rosette and vegetative), to glyphosate and acetolactate synthase(ALS)-inhibiting herbicides. Dose-response experiments were performed using 0, 1/16, 1/8, 1/4, 1/2, 1, 2, 4, 8, and 16-fold of the recommended dose for each herbicide. At rosette stage, the resistance level for glyphosate was 9.8, while at the vegetative stage neither biotype was controlled with the recommended dose, with lower sensitivity of biotype R (RI = 2.3). Control of both biotypes using ALS-inhibiting herbicides was excellent at rosette stage, with lower doses than the recommended. At vegetative stage controls were good (80 %) with lowerdoses than recommended (0.16 X to 0.97 X), except for metsulfuron-methyl +chlorsulfuron in biotype S (1.75 X). These results may confirm the existence of abiotype resistant to glyphosate in Argentina and that ALS-inhibiting herbicides could control resistant biotypes and more developed individuals. |
format | Online |
id | oai:ojs.revistas.unc.edu.ar:article-25404 |
institution | Universidad Nacional de Cordoba |
language | spa |
publishDate | 2020 |
publisher | Facultad de Ciencias Agropecuarias |
record_format | ojs |
spelling | oai:ojs.revistas.unc.edu.ar:article-254042023-04-13T17:07:56Z Sensitivity of Conyza sumatrensis biotypes to glyphosate and ALS-inhibiting herbicides at two growth stages. Sensibilidad de biotipos de Conyza sumatrensis a glifosato y a inhibidores de ALS en dos estados de desarrollo Balassone, Federico Puricelli, Eduardo Faccini, Delma resistance dose-response EPSPS Inhibitor Sumatran fleabane resistencia dosis-respuesta Inhibidor de la EPSPS rama negra Conyza sumatrensis is one of the most problematic weeds in Argentina, withfrequent control failures after glyphosate application. The objective of this research was to evaluate sensitivity of C. sumatrensis biotypes, at two growth stages (rosette and vegetative), to glyphosate and acetolactate synthase(ALS)-inhibiting herbicides. Dose-response experiments were performed using 0, 1/16, 1/8, 1/4, 1/2, 1, 2, 4, 8, and 16-fold of the recommended dose for each herbicide. At rosette stage, the resistance level for glyphosate was 9.8, while at the vegetative stage neither biotype was controlled with the recommended dose, with lower sensitivity of biotype R (RI = 2.3). Control of both biotypes using ALS-inhibiting herbicides was excellent at rosette stage, with lower doses than the recommended. At vegetative stage controls were good (80 %) with lowerdoses than recommended (0.16 X to 0.97 X), except for metsulfuron-methyl +chlorsulfuron in biotype S (1.75 X). These results may confirm the existence of abiotype resistant to glyphosate in Argentina and that ALS-inhibiting herbicides could control resistant biotypes and more developed individuals. Conyza sumatrensis es una de las malezas más problemáticas de Argentina, con frecuentes fallas de control después de la aplicación de glifosato. El objetivo del trabajo fue evaluar la sensibilidad de biotipos de C. sumatrensis, en dos estados de desarrollo (roseta y vegetativo), a glifosato y a inhibidores de la enzima acetolactato sintasa (ALS). Se realizaron estudios de dosis-respuesta utilizando 0, 1/16, 1/8, 1/4, 1/2, 1, 2, 4, 8 y 16 veces la dosis recomendada para cada herbicida. Al estado de roseta el nivel de resistencia para glifosato fue de 9,8, mientras que en estado vegetativo ninguno de los biotipos fue controlado con la dosis recomendada, siendo menor la sensibilidad del biotipo R (IR = 2,3). El control de ambos biotipos con inhibidores de la ALS fue excelente al estado de roseta, con dosis menores que las recomendadas. Al estado vegetativo los controles fueron adecuados (80 %) con dosis menores que las recomendadas(0,16 X a 0,97 X), excepto para metsulfuron-metil + clorsulfuron en el biotipo S (1,75 X). Estos resultados confirmarían la existencia de un biotipo resistente a glifosato en Argentina y que los herbicidas inhibidores de la ALS pueden controlar biotipos resistentes e individuos más desarrollados. Facultad de Ciencias Agropecuarias 2020-12-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf application/pdf https://revistas.unc.edu.ar/index.php/agris/article/view/25404 10.31047/1668.298x.v37.n2.25404 AgriScientia; Vol. 37 No. 2 (2020); 11-20 AgriScientia; Vol. 37 Núm. 2 (2020); 11-20 1668-298X 10.31047/1668.298x.v37.n2 spa https://revistas.unc.edu.ar/index.php/agris/article/view/25404/41042 https://revistas.unc.edu.ar/index.php/agris/article/view/25404/32702 Derechos de autor 2020 Federico Balassone, Eduardo Puricelli, Delma Faccini https://creativecommons.org/licenses/by-sa/4.0 |
spellingShingle | resistance dose-response EPSPS Inhibitor Sumatran fleabane resistencia dosis-respuesta Inhibidor de la EPSPS rama negra Balassone, Federico Puricelli, Eduardo Faccini, Delma Sensitivity of Conyza sumatrensis biotypes to glyphosate and ALS-inhibiting herbicides at two growth stages. |
title | Sensitivity of Conyza sumatrensis biotypes to glyphosate and ALS-inhibiting herbicides at two growth stages. |
title_alt | Sensibilidad de biotipos de Conyza sumatrensis a glifosato y a inhibidores de ALS en dos estados de desarrollo |
title_full | Sensitivity of Conyza sumatrensis biotypes to glyphosate and ALS-inhibiting herbicides at two growth stages. |
title_fullStr | Sensitivity of Conyza sumatrensis biotypes to glyphosate and ALS-inhibiting herbicides at two growth stages. |
title_full_unstemmed | Sensitivity of Conyza sumatrensis biotypes to glyphosate and ALS-inhibiting herbicides at two growth stages. |
title_short | Sensitivity of Conyza sumatrensis biotypes to glyphosate and ALS-inhibiting herbicides at two growth stages. |
title_sort | sensitivity of conyza sumatrensis biotypes to glyphosate and als inhibiting herbicides at two growth stages |
topic | resistance dose-response EPSPS Inhibitor Sumatran fleabane resistencia dosis-respuesta Inhibidor de la EPSPS rama negra |
topic_facet | resistance dose-response EPSPS Inhibitor Sumatran fleabane resistencia dosis-respuesta Inhibidor de la EPSPS rama negra |
url | https://revistas.unc.edu.ar/index.php/agris/article/view/25404 |
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