Selectivity of herbicides and weed control in the establishment of Brachiaria brizantha-Leucaena leucocephala mixtures

Selectivity of herbicides and weed control in the establishment of Brachiaria brizantha-Leucaena leucocephala mixtures

A study was carried out at Mocochá, Yucatán, México with the objective of determining whether the application of bentazon, imazethapyr or metribuzin would improve postemergence (POST) weed control without damaging a huaxin (leucaena, guaje, leadtree, wild tamarind) {Leucaena leucocephala (Lam.) de Wit} and insurgente grass (Brachiaria brizantha Richard Stapf) association. In both June 2004 and 2005, insurgente grass (INS) and huaxin (HUA) were seeded in an arrangement of two by one rows, respectively. Herbicide treatments were a single application of bentazon, imazethapyr or metribuzin at three different rates each, and the same herbicides at a single rate but applied sequentially two and three times during the growing season. Metribuzin damaged INS (10 to 95 %) and HUA (55 to 100 %) in both years. Overall, both forage species were tolerant to bentazon and imazethapyr. In 2004, both bentazon and metribuzin showed a greater weed control (82 %) than imazethapyr (70 %), in 2005, weed control was similar for all three herbicides (P>0.05), which averaged a moderate 65 %. This study shows that an increase in 1,000 kg DM ha-1 of weed biomass, decreases forage yield for this association by 190 kg DM ha-1. Forage yields with bentazon applied three times at a 0.8 kg a.i. ha-1 rate were similar to those in the weed-free control. In tropical areas, bentazon should be an interesting option for weed control in insurgente-huaxin associations.

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Main Authors: Rivas Pantoja, Fernando, Castillo Huchim, Javier E., Ortega Reyes, Luis
Format: Digital revista
Language:spa
Published: Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias 2012
Online Access:https://cienciaspecuarias.inifap.gob.mx/index.php/Pecuarias/article/view/1464
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spelling rev-remexcp-article14642020-06-18T19:56:59Z Selectivity of herbicides and weed control in the establishment of Brachiaria brizantha-Leucaena leucocephala mixtures Selectividad de herbicidas y control de malezas para establecer una asociación Brachiaria brizantha-Leucaena leucocephala Rivas Pantoja, Fernando Castillo Huchim, Javier E. Ortega Reyes, Luis Grass-legume associations, Brachiaria, Leucaena, Establishment, Weeds, Bentazon, Imazethapyr Asociación, Brachiaria, Leucaena, Establecimiento, Malezas, Bentazon, Imazethapyr A study was carried out at Mocochá, Yucatán, México with the objective of determining whether the application of bentazon, imazethapyr or metribuzin would improve postemergence (POST) weed control without damaging a huaxin (leucaena, guaje, leadtree, wild tamarind) {Leucaena leucocephala (Lam.) de Wit} and insurgente grass (Brachiaria brizantha Richard Stapf) association. In both June 2004 and 2005, insurgente grass (INS) and huaxin (HUA) were seeded in an arrangement of two by one rows, respectively. Herbicide treatments were a single application of bentazon, imazethapyr or metribuzin at three different rates each, and the same herbicides at a single rate but applied sequentially two and three times during the growing season. Metribuzin damaged INS (10 to 95 %) and HUA (55 to 100 %) in both years. Overall, both forage species were tolerant to bentazon and imazethapyr. In 2004, both bentazon and metribuzin showed a greater weed control (82 %) than imazethapyr (70 %), in 2005, weed control was similar for all three herbicides (P>0.05), which averaged a moderate 65 %. This study shows that an increase in 1,000 kg DM ha-1 of weed biomass, decreases forage yield for this association by 190 kg DM ha-1. Forage yields with bentazon applied three times at a 0.8 kg a.i. ha-1 rate were similar to those in the weed-free control. In tropical areas, bentazon should be an interesting option for weed control in insurgente-huaxin associations. El objetivo fue identificar selectividad de herbicidas postemergentes en el pasto insurgente (Brachiaria brizantha Richard Stapf) y huaxín [Leucaena leucocephala (Lam.) de Wit] para establecer asociaciones. El estudio se efectuó en Mocochá, Yuc., en 2004 y 2005. En junio de ambos años, semillas de insurgente (INS) y de huaxín (HUA) fueron sembrados a chorrillo en un arreglo de dos hileras de INS por una de HUA. Se evaluaron bentazon, imazethapyr y metribuzin en tres distintas dosis aplicadas en una sola ocasión y en dos y tres secuencias, en dosis única. En ambos años, metribuzin resultó fitotóxico en INS (10 a 95 %) y HUA (55 a 100 %), en contraste, bentazon e imazethapyr fueron tolerados por estas especies. En 2004, bentazon y metribuzin destacaron por su buen control de malezas (82 %), en 2005 se observó un control similar (P>0.05) entre los tres herbicidas, siendo este moderado (65 %). En este estudio se cuantificó que por cada 1,000 kg (MS/ha) de malezas acumulado, el rendimiento de forraje de la asociación disminuyó 190 kg (MS/ha). Bentazon en dosis de 0.8 kg i.a./ha asperjado en tres ocasiones durante el periodo de crecimiento vigoroso de las malezas, destacó por registrar una producción de forraje similar (P>0.05) a la alcanzada en las áreas libres de malezas (deshierbe). En regiones tropicales, bentazon podría ser una opción útil para el control de malezas dentro de una asociación insurgente-huaxín. Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias 2012-01-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://cienciaspecuarias.inifap.gob.mx/index.php/Pecuarias/article/view/1464 Revista Mexicana de Ciencias Pecuarias; Vol. 47, Núm. 4 (2009); 339 a 355 Revista Mexicana de Ciencias Pecuarias; Vol. 47, Núm. 4 (2009); 339 a 355 2448-6698 2007-1124 spa https://cienciaspecuarias.inifap.gob.mx/index.php/Pecuarias/article/view/1464/1459 http://creativecommons.org/licenses/by-nc-sa/4.0
institution INIFAP
collection OJS
country México
countrycode MX
component Revista
access En linea
databasecode rev-remexcp
tag revista
region America del Norte
libraryname Biblioteca INIFAP
language spa
format Digital
author Rivas Pantoja, Fernando
Castillo Huchim, Javier E.
Ortega Reyes, Luis
spellingShingle Rivas Pantoja, Fernando
Castillo Huchim, Javier E.
Ortega Reyes, Luis
Selectivity of herbicides and weed control in the establishment of Brachiaria brizantha-Leucaena leucocephala mixtures
author_facet Rivas Pantoja, Fernando
Castillo Huchim, Javier E.
Ortega Reyes, Luis
author_sort Rivas Pantoja, Fernando
title Selectivity of herbicides and weed control in the establishment of Brachiaria brizantha-Leucaena leucocephala mixtures
title_short Selectivity of herbicides and weed control in the establishment of Brachiaria brizantha-Leucaena leucocephala mixtures
title_full Selectivity of herbicides and weed control in the establishment of Brachiaria brizantha-Leucaena leucocephala mixtures
title_fullStr Selectivity of herbicides and weed control in the establishment of Brachiaria brizantha-Leucaena leucocephala mixtures
title_full_unstemmed Selectivity of herbicides and weed control in the establishment of Brachiaria brizantha-Leucaena leucocephala mixtures
title_sort selectivity of herbicides and weed control in the establishment of brachiaria brizantha-leucaena leucocephala mixtures
description A study was carried out at Mocochá, Yucatán, México with the objective of determining whether the application of bentazon, imazethapyr or metribuzin would improve postemergence (POST) weed control without damaging a huaxin (leucaena, guaje, leadtree, wild tamarind) {Leucaena leucocephala (Lam.) de Wit} and insurgente grass (Brachiaria brizantha Richard Stapf) association. In both June 2004 and 2005, insurgente grass (INS) and huaxin (HUA) were seeded in an arrangement of two by one rows, respectively. Herbicide treatments were a single application of bentazon, imazethapyr or metribuzin at three different rates each, and the same herbicides at a single rate but applied sequentially two and three times during the growing season. Metribuzin damaged INS (10 to 95 %) and HUA (55 to 100 %) in both years. Overall, both forage species were tolerant to bentazon and imazethapyr. In 2004, both bentazon and metribuzin showed a greater weed control (82 %) than imazethapyr (70 %), in 2005, weed control was similar for all three herbicides (P>0.05), which averaged a moderate 65 %. This study shows that an increase in 1,000 kg DM ha-1 of weed biomass, decreases forage yield for this association by 190 kg DM ha-1. Forage yields with bentazon applied three times at a 0.8 kg a.i. ha-1 rate were similar to those in the weed-free control. In tropical areas, bentazon should be an interesting option for weed control in insurgente-huaxin associations.
publisher Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias
publishDate 2012
url https://cienciaspecuarias.inifap.gob.mx/index.php/Pecuarias/article/view/1464
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