Effect of Tillage Intensity on Herbicide Efficacy and Eucalyptus spp. Productivity
Weed interference in Eucalyptus must be eliminated early before treetop closure. In Uruguay, weed control in the planting rows is done with preemergent herbicides. This practice, that is performed in conjunction with rigorous soil preparation to ensure herbicide effectiveness, entails high production costs and erosion risks. We studied the effect of the type of within-row tillage (1) one pass of a heavy offset disk harrow, 2) two offset disk passes including a tooth harrow in the second pass, and 3) the same treatment followed by mounding of the rows) on preemergent herbicide efficacy and growth of Eucalyptus (a hybrid clone of Eucalyptus grandis x Eucalyptus globules). The herbicides evaluated were: oxifluorfen 240 g/ha; oxifluorfen 480 g/ha; isoxaflutole 150 g/ha; sulfentrazone 300 g/ha; sulfentrazone 400 g/ha; diclosulam 42 g/ha + 1800 acetochlor g/ha; acetochlor 1800 g/ha; oxifluorfen 240 g/ha + acetochlor 1800 g/ha. There was no interaction between preemergent herbicide effectiveness and tillage on total weed cover. The best treatments for selective weed control on the Eucalyptus grandis x Eucalyptus globulus hybrid clone were isoxaflutole (150g/ha) and oxifluorfen (240g/ha) + acetochlor (1800g/ha).
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Coeditada entre Facultad de Agronomía - Udelar y el Instituto Nacional de Investigación Agropecuaria (INIA)
2010
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oai:oai.agrocienciauruguay.uy:article-6262023-12-28T17:26:51Z Effect of Tillage Intensity on Herbicide Efficacy and Eucalyptus spp. Productivity Efecto del laboreo sobre la eficacia de herbicidas y el crecimiento de crecimiento de Eucalyptus spp. Villalba, Juana Montouto, Cristian Cazaban, Julio Caraballo, Pablo Bentancur, Oscar weed control Eucalyptus herbicides tillage control malezas Eucalyptus herbicidas laboreo Weed interference in Eucalyptus must be eliminated early before treetop closure. In Uruguay, weed control in the planting rows is done with preemergent herbicides. This practice, that is performed in conjunction with rigorous soil preparation to ensure herbicide effectiveness, entails high production costs and erosion risks. We studied the effect of the type of within-row tillage (1) one pass of a heavy offset disk harrow, 2) two offset disk passes including a tooth harrow in the second pass, and 3) the same treatment followed by mounding of the rows) on preemergent herbicide efficacy and growth of Eucalyptus (a hybrid clone of Eucalyptus grandis x Eucalyptus globules). The herbicides evaluated were: oxifluorfen 240 g/ha; oxifluorfen 480 g/ha; isoxaflutole 150 g/ha; sulfentrazone 300 g/ha; sulfentrazone 400 g/ha; diclosulam 42 g/ha + 1800 acetochlor g/ha; acetochlor 1800 g/ha; oxifluorfen 240 g/ha + acetochlor 1800 g/ha. There was no interaction between preemergent herbicide effectiveness and tillage on total weed cover. The best treatments for selective weed control on the Eucalyptus grandis x Eucalyptus globulus hybrid clone were isoxaflutole (150g/ha) and oxifluorfen (240g/ha) + acetochlor (1800g/ha). La eliminación de la competencia de malezas en el cultivo de Eucalyptus es fundamental en las etapas iniciales de crecimiento hasta el cierre de copa. En el Uruguay, el control de malezas en el surco de plantación se realiza básicamente con herbicidas premergentes, los cuales se asocian a una preparación de suelo muy estricta en relación al afinado para mejorar así la efectividad de los herbicidas, con el consecuente incremento de los costos de producción y de los riesgos de erosión. Se estudió el efecto del tipo de laboreo en la fila (una pasada de excéntrica; dos pasadas de excéntrica, la última con una rastra de dientes; igual al anterior, seguido de acamellonado) sobre la efectividad de los herbicidas premergentes y sobre el crecimiento del clon Eucalyptus grandis x Eucalyptus globulus. Los tratamientos herbicidas fueron oxifluorfen 240 g/ha, oxifluorfen 480 g/ha, isoxaflutole 150 g/ha, sulfentrazona 300 g/ha, sulfentrazona 400 g/ha, diclosulam 42 g/ha + acetoclor 1800 g/ha, acetoclor 1800 g/ha, oxifluorfen 240 g/ha+ acetoclor 1800 g/ha. La mayor intensidad en el laboreo disminuyó la infestación inicial de malezas. La eficiencia de los herbicida premergentes sobre la cobertura total de malezas no interaccionó con el tipo de laboreo. Los tratamientos selectivos de mayor control de malezas fueron isoxaflutole y oxifluorfen + acetoclor. Coeditada entre Facultad de Agronomía - Udelar y el Instituto Nacional de Investigación Agropecuaria (INIA) 2010-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://agrocienciauruguay.uy/index.php/agrociencia/article/view/626 10.31285/AGRO.14.626 Agrociencia Uruguay; Vol. 14 No. 2 (2010); 45- 54 Agrociencia Uruguay; Vol. 14 Núm. 2 (2010); 45- 54 Agrociencia Uruguay; v. 14 n. 2 (2010); 45- 54 2730-5066 spa https://agrocienciauruguay.uy/index.php/agrociencia/article/view/626/648 Copyright (c) 2021 Agrociencia Uruguay https://creativecommons.org/licenses/by/4.0 |
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UDELAR |
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Uruguay |
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rev-agrociencia-uy |
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America del Sur |
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Biblioteca de la Facultad de Agronomía de la UDELAR de UY |
| language |
spa |
| format |
Digital |
| author |
Villalba, Juana Montouto, Cristian Cazaban, Julio Caraballo, Pablo Bentancur, Oscar |
| spellingShingle |
Villalba, Juana Montouto, Cristian Cazaban, Julio Caraballo, Pablo Bentancur, Oscar Effect of Tillage Intensity on Herbicide Efficacy and Eucalyptus spp. Productivity |
| author_facet |
Villalba, Juana Montouto, Cristian Cazaban, Julio Caraballo, Pablo Bentancur, Oscar |
| author_sort |
Villalba, Juana |
| title |
Effect of Tillage Intensity on Herbicide Efficacy and Eucalyptus spp. Productivity |
| title_short |
Effect of Tillage Intensity on Herbicide Efficacy and Eucalyptus spp. Productivity |
| title_full |
Effect of Tillage Intensity on Herbicide Efficacy and Eucalyptus spp. Productivity |
| title_fullStr |
Effect of Tillage Intensity on Herbicide Efficacy and Eucalyptus spp. Productivity |
| title_full_unstemmed |
Effect of Tillage Intensity on Herbicide Efficacy and Eucalyptus spp. Productivity |
| title_sort |
effect of tillage intensity on herbicide efficacy and eucalyptus spp. productivity |
| description |
Weed interference in Eucalyptus must be eliminated early before treetop closure. In Uruguay, weed control in the planting rows is done with preemergent herbicides. This practice, that is performed in conjunction with rigorous soil preparation to ensure herbicide effectiveness, entails high production costs and erosion risks. We studied the effect of the type of within-row tillage (1) one pass of a heavy offset disk harrow, 2) two offset disk passes including a tooth harrow in the second pass, and 3) the same treatment followed by mounding of the rows) on preemergent herbicide efficacy and growth of Eucalyptus (a hybrid clone of Eucalyptus grandis x Eucalyptus globules). The herbicides evaluated were: oxifluorfen 240 g/ha; oxifluorfen 480 g/ha; isoxaflutole 150 g/ha; sulfentrazone 300 g/ha; sulfentrazone 400 g/ha; diclosulam 42 g/ha + 1800 acetochlor g/ha; acetochlor 1800 g/ha; oxifluorfen 240 g/ha + acetochlor 1800 g/ha. There was no interaction between preemergent herbicide effectiveness and tillage on total weed cover. The best treatments for selective weed control on the Eucalyptus grandis x Eucalyptus globulus hybrid clone were isoxaflutole (150g/ha) and oxifluorfen (240g/ha) + acetochlor (1800g/ha). |
| publisher |
Coeditada entre Facultad de Agronomía - Udelar y el Instituto Nacional de Investigación Agropecuaria (INIA) |
| publishDate |
2010 |
| url |
https://agrocienciauruguay.uy/index.php/agrociencia/article/view/626 |
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