Control de lecheron (Euphorbia dentata) con glifosato

Juan, V.F.; Saint-André, Horacio María; Fernandez, R.R.

doi:10.1590/s0100-83582006000200018

Cited by 3 publications

(7 citation statements)

References 13 publications

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“…Moreover, by increasing doses of glyphosate at 356 or 712 g ha -1 in all periods of evaluation, controls of I. unisetus were statistically similar, regardless of pH of water application ( In this experiment, again determined that glyphosate is the most important factor to control I. unisetus, and that increasing the dose there is a more efficient control of this weed. This coincides with that reported by other authors for different weed species (Faccini and Puricelli, 2002;Koger et al, 2004;Juan et al, 2006;Pinto et al, 2009). …”

Section: Experimento 2: Dosis De Glifosato Y Ph Del Agua De Aplicaciónsupporting

confidence: 93%

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Efecto del volumen y el pH del agua en el control de Ixophorus unisetus (J. Presl.) Schltdl. con glifosato

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2018

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Efecto del volumen y el pH del agua en el control de Ixophorus unisetus (J. Presl.) Schltdl. con glifosato* Effect of volume and pH of water to control AbstractTwo experiments were established to determine the effect of volume and pH of spray water in controlling grass Ixophorus unisetus with various doses of the herbicide glyphosate. The experiment was located in Medellin, Veracruz, Mexico, in a randomized block design with four replications and arrangement of treatments in a split plot. In both experiments, large plots corresponded to three doses of glyphosate (267, 356 and 712 g ha -1 ), while the split plots in experiment 1, corresponded to four volumes of application (133, 217, 294 and 370 L ha -1 ) and on experiment 2 four pH levels (5, 6, 7 and 8). Control of I. unisetus at 7, 15 and 30 days after application (DAA) was evaluated and the dry weight of the aerial parts at 30 DAA were determined. The application of glyphosate at 712 g ha -1 had the highest control of I. unisetus. The effectiveness of the herbicide was greater when applied with a water volume of 217 or 294 L ha -1 or the pH of this varied between 5 and 7. Control of I. unisetus was reduced with a dose of 267 g ha -1 , using a water volume of 370 L ha -1 or when pH of water was 8. IntroducciónEl glifosato [N-(fosfonometil) glicina] es un herbicida del grupo químico de los ácidos fosfónicos que inhibe a la enzima enol-piruvil-shikimato-fosfato sintetasa, lo que resulta en el bloqueo de la síntesis de aminoácidos aromáticos (Alibhai y Stallings, 2001), que conduce eventualmente a la muerte de las plantas. Por ser un herbicida sistémico, no selectivo, y que no deja residuos tóxicos en el suelo (Wibawa et al., 2009), se utiliza extensivamente para el control de malezas anuales y perennes en los sistemas de labranza de conservación, cultivos frutales e industriales, áreas no cultivables, orillas de caminos y vías férreas (Ekboir, 2003;Parreira et al., 2010). Con el desarrollo de cultivos transgénicos resistentes a este herbicida, se ha incrementado su uso en gran medida, pues se utiliza como parte medular del control de malezas (Dill et al., 2008;Green, 2009), por lo que en la actualidad se considera el herbicida que más impacto tiene en la agricultura (Duke y Powless, 2008).La efectividad del glifosato está influenciada por diversos factores; por ejemplo, numerosos estudios indican que al aplicarlo en volúmenes de agua bajos, se obtienen mejores controles de malezas que cuando el volumen es alto (Jordan 1981; Buhler y Burnside, 1983;Ramsdale et al., 2003;Kogan y Alister, 2008). En un estudio realizado en cámara de crecimiento con cebada, O'Sullivan et al. (1981) encontraron que al incrementar los volúmenes de aplicación de 110 a 550 L ha -1 , se redujo la efectividad del glifosato a las dosis de 0.14 y 0.28 kg ha -1 , en comparación con las dosis de 0.56 y 0.84 kg ha -1 . Sin embargo, en el cultivo de caña de azúcar, Rodrigues et al. (2011) encontraron que el volumen asperjado no tuvo efecto en el grado de control de Digitaria insularis (L.) F...

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Section: Experimento 2: Dosis De Glifosato Y Ph Del Agua De Aplicaciónsupporting

confidence: 93%

“…Lo anterior coincide por lo reportado por otros autores para diferentes especies de malezas (Faccini y Puricelli, 2002;Koger et al, 2004;Juan et al, 2006;Pinto et al, 2009).…”

Section: Experimento 2: Dosis De Glifosato Y Ph Del Agua De Aplicaciónunclassified

Efecto del volumen y el pH del agua en el control de Ixophorus unisetus (J. Presl.) Schltdl. con glifosato

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2018

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“…Studies conducted in the late 1990s, on agricultural lots in the central area of Buenos Aires Province, reported weed densities rates between 20 and 200 plants m -2 (Juan et al, 1996), where as some recent researches revealed an increase in population density, ranging from 300 to 900 plants m -2 (Juan et al, 2011;Núñez Fré et al, 2014).…”

Section: Introductionmentioning

confidence: 97%

“…It is an spring-summer annual weed that causes significant yield reduction in soybean in central and southeastern sections of Buenos Aires Province, Argentina (Juan et al, 2011). In the last two decades it has been observed an increase in constancy, density and geographical distribution of E. davidii in this region.…”

Section: Introductionmentioning

confidence: 99%

“…Globally, little is known about management strategies to control this species (Storrie and Cook, 1996), and, in Argentina, the most recent studies by Juan et al (2011) have demonstrated the increasing difficulty of controlling E. davidii using glyphosate as the only herbicide in transgenic glyphosate-resistant (GM) soybeans. This could be due to an evolution of populations towards resistance.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Sensitivity to Glyphosate of Euphorbia davidii Populations

et al. 2017

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Euphorbia davidii (Euphorbiaceae) is a summer annual weed present in the Province of Buenos Aires, Argentina. The aim of this study was to compare the sensitivity to glyphosate of different populations of Euphorbia davidii. Two techniques were used: a seed bioassay and shikimate determination in glyphosate-treated plants. Germination rates of seeds belonging to the populations from Espartillar, Barrow, Olavarria and Azul exposed to different concentrations of glyphosate were compared. Plants from the same locations treated with glyphosate were evaluated to determine shikimate levels. The most sensitive population was from Espartillar, with a CE50 (average effective concentration) of 4.00 g e.a. L-1. Based on this finding, the resistance index for each population was 1.76, 2.39 and 2.48 for Azul, Olavarria and Barrow respectively. Regarding glyphosate-treated plants in which shikimate levels were determined, a significant increase in the concentration of this metabolite was only observed in the population from Espartillar. Accumulation of shikimate was not detected in the other groups. These results show differential sensitivity to glyphosate of the evaluated populations.

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A Weed Population Dynamics Model for Integrated Weed-Management Decision-Making Support: Euphorbia davidii Subils in Soybean Crops as a Simulation Study

et al. 2022

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A crop–weed simulation model is presented to compare and evaluate integrated weed-management (IWM) strategies. Specifically, the model was parameterized for soybean crops in competition with Euphorbia davidii Subils. We used both weed and crop demographic data surveyed in agronomic fields of the central zone of the Buenos Aires province, Argentina, throughout two crop cycles (2011/2012 and 2013/2014). The proposed model underwent a calibration process and subsequent validation with a 70/30% data split, (N = 37). Two annual-based and one multiannual-based case studies were simulated to demonstrate the performance of the model. Different IWM strategies were compared under both operational and tactical planning horizons through the evaluation of different model outcomes (i.e., crop yield, interspecific competition, economic return, and environmental impact). Our results suggest that the inclusion of cultural management practices could reduce both weed interspecific competition by 46 to 97%, and weed seed production by 40 to 89 %. An increment in both expected crop yield, by 6 to 20%, and annual gross margin, by 44 to 199 USD.ha−1, were obtained in silico for similar levels of environmental impact.

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Control de lecheron (Euphorbia dentata) con glifosato

Cited by 3 publications

References 13 publications

Efecto del volumen y el pH del agua en el control de Ixophorus unisetus (J. Presl.) Schltdl. con glifosato

Efecto del volumen y el pH del agua en el control de Ixophorus unisetus (J. Presl.) Schltdl. con glifosato

Comparison of Sensitivity to Glyphosate of Euphorbia davidii Populations

A Weed Population Dynamics Model for Integrated Weed-Management Decision-Making Support: Euphorbia davidii Subils in Soybean Crops as a Simulation Study

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