Response of Seedling Alfalfa (<i>Medicago sativa</i>) to Four Postemergence Herbicides

Tonks, Dennis J.; Jeffery, L. S.; Webb, Brent W.

doi:10.1017/s0890037x00033777

Cited by 8 publications

(8 citation statements)

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“…Several studies have shown that some herbicides can have initial phytotoxic effects, although seedlings usually recover without severe damage, and yield loss are not observed (Díaz et al 1992;Ivany et al 2002;Thomas et al 1994;Tonks et al 1991;Volenberg et al 2002;Young et al 2003). In other studies, however, various clover species were exposed and evaluated for tolerance to different herbicides including pendimethalin and metolachlor (Tharp and Kells 2000), bentazon and 2,4-D (Evers et al 1993), 2,4-D and dicamba (Griffin et al 1984), and MCPA and 2,4-DB (Conrad and Stritzke 1980); in all cases, yield and persistence of the legume were markedly reduced.…”

Section: Introductionmentioning

confidence: 99%

Effect of five postemergence herbicides on red clover shoot and root growth in greenhouse studies

Ceballos

Palma

Brevis

et al. 2005

phyto

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Société de protection des plantes du Québec (SPPQ)ISSN 0031-9511 (imprimé) 1710-1603 (numérique) Découvrir la revue Citer cet article Ceballos, R., Palma, G., Brevis, H., Ortega, F. & Quiroz, A. (2004). Effect of five postemergence herbicides on red clover shoot and root growth in greenhouse studies. Phytoprotection, 85(3), 153-160. doi:10.7202 MCPA, 2,4-DB, flumetsulam, bentazon, haloxyfop-methyl, flumetsulam/2,4-DB and bentazon/MCPA were studied in greenhouse experiments in order to evaluate their primary effects on red clover (Trifolium pratense) growth and root injury. The influence of these herbicides on root length, plant height, crown diameter, shoot and root dry weights, shoot phytotoxicity and root injury were studied at two application rates. Variable responses in the growth parameters were observed throughout the experimental period. Herbicides did not affect root length. By the end of experiment, plant height was increased by all herbicides except MCPA and bentazon/MCPA. Crown diameter was increased only with MCPA and 2,4-DB, whereas it was not affected by the other herbicides. Bentazon reduced root dry weight while the other herbicides had no effect. In general, MCPA, bentazon, and bentazon/MCPA reduced shoot dry weight. Although all herbicides caused early foliar damage, the plants recovered by the end of experiment comparable to the control plants. Bentazon and bentazon/MCPA produced the greatest shoot damage. Roots were injured from all herbicides, yet they usually recovered over time. However, bentazon/MCPA induced more severe root injury, up to 17% of the plants, causing seedlings died. These results suggest that some herbicides used to protect red clover against weeds may also affect red clover development, increasing its vulnerability to disease. [Effet de cinq herbicides de postlevée sur la croissance de tiges et de racines du trèfle rouge lors d'essais en serre]Le MCPA, le 2,4-DB, le flumetsulam, le bentazone, le haloxyfop-méthyl, le flumetsulam/2,4-DB et le bentazone/MCPA ont été étudiés lors d'expériences en serre afin d'évaluer leurs principaux effets sur la croissance du trèfle rouge (Trifolium pratense) ainsi que sur les dommages racinaires qu'ils pourraient lui causer. Les conséquences qu'ont ces herbicides sur la longueur des racines, la taille de la plante, le diamètre du collet, les poids secs des tiges et des racines, ainsi que leur phytotoxicité pour les tiges et les dommages aux racines ont été étudiés pour deux doses d'application. Les paramètres de croissance ont eu des résultats indépendants les uns des autres tout au long de la durée des expériences. Les herbicides n'ont pas eu d'effet sur la longueur des racines. À la fin des expériences, la taille de la plante avait été augmentée par tous les herbicides sauf le MCPA et le bentazone/MCPA. Le diamètre du collet n'avait été augmenté que par le MCPA et le 2,4-DB, alors que les autres herbicides n'avaient pas eu d'effet. Le bentazone a fait diminuer le poids sec des racines alors que les autres herbicides n'ont pas eu d'ef...

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Section: Introductionmentioning

confidence: 99%

Effect of five postemergence herbicides on red clover shoot and root growth in greenhouse studies

Ceballos

Palma

Brevis

et al. 2005

phyto

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“…Broadleaf weeds, such as thistles and Brassicaceae, are controlled with 2,4-DB. Flumetsulam and chlorimuron have also been recommended for controlling burning nettle, swinecress, and common chickweed, which are not controlled by 2,4-DB (Lopez and Romera 1993;Tonks et al 1991). In established alfalfa, clethodim and haloxyfop controlled grasses but did not increase forage yield (Foy and Witt 1992;Twidwell et al 1994).…”

Section: Introductionmentioning

confidence: 99%

Weed Control in Established Alfalfa (Medicago sativa) with Postemergence Herbicides¹

Arregui¹,

Sánchez²,

Scotta³

2001

Weed Technology

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Field experiments were conducted during 1998, 1999, and 2000 in Santa Fe, Argentina, to evaluate chlorimuron, clethodim, flumetsulam, 2,4-DB, glyphosate, and haloxyfop for control of broadleaf and grass weeds in established alfalfa. Herbicides were applied to alfalfa, 6 to 10 cm in height, after first or second cuttings. Clethodim and haloxyfop were highly effective against bermudagrass, barnyardgrass, and knotroot foxtail, and alfalfa yields were increased. 2,4-DB was effective against Scotch thistle, swinecress, turnipweed, and birdsrape mustard, but no effects were observed on alfalfa yields. Chlorimuron, flumetsulam, and glyphosate were effective against burning nettle, common chickweed, common lambsquarters, spiny cocklebur, and Persian speedwell, but they injured alfalfa and decreased yields.

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“…Así, el control químico de malezas puede ser una técnica eficaz y económica si el herbicida es totalmente selectivo para la planta forrajera, de modo que no presente efectos de fitotoxicidad que perjudiquen el desarrollo o su rendimiento (Verzig-nassi et al, 2005;Rivas Pantoja et al, 2009). Es sabido que el control químico de malezas es una herramienta habitual en otras especies cultivadas leguminosas como soja (Glycine max L.) (Young et al, 2003), alfalfa (Medicago sativa L.) (Wilson, 1981;Tonks et al, 1991) y trébol rojo (Trifolium pratense L.) (Ceballos et al, 2005), aunque en todos esos cultivos es esencial utilizar la dosis adecuada de herbicida que permita un eficiente control de malezas sin producir fitotoxicidad.…”

Section: Introductionunclassified

Fitotoxicidad de herbicidas postemergentes sobre Adesmia bicolor (Poir.) DC y control de malezas asociadas

Autrán¹,

Puricelli²,

Andrés³

2013

AgriS

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Un mejor conocimiento del manejo de las especies nativas de leguminosas forrajeras como Adesmia bicolor puede ayudar a lograr una mayor calidad y estabilidad en la producción de los pastizales. No existe información disponible en la Argentina sobre el tipo y dosis de herbicidas adecuados para el control de malezas en A. bicolor. Los objetivos fueron evaluar el efecto fitotóxico de herbicidas postemergentes a diferentes dosis sobre A. bicolor y el control de las malezas latifoliadas que crecen asociadas en ensayos a campo durante 2009 y 2010. El diseño fue de parcelas divididas donde la parcela mayor fue el tipo de herbicida (2,4-DB e imazetapir) y la parcela menor la dosis (1/4X, 1/2X, 1X, 2X, 4X, 8X, siendo X = 250 g i.a. ha-1 para 2,4-DB y X=100 g i.a. ha-1 para imazetapir), con tres repeticiones para cada tratamiento. La materia seca de A. bicolor y el control de malezas se ajustaron a curvas de dosis-respuesta. Se observó efectos fitotóxicos aun con muy baja dosis de 2,4-DB, mientras que imazetapir mostró baja fitotoxicidad para las dosis entre 25 y 100 g a.i. ha-1. El control de malezas con ambos herbicidas fue mayor al 80% con dosis de 1X.

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Response of Seedling Alfalfa (Medicago sativa) to Four Postemergence Herbicides

Cited by 8 publications

References 10 publications

Effect of five postemergence herbicides on red clover shoot and root growth in greenhouse studies

Effect of five postemergence herbicides on red clover shoot and root growth in greenhouse studies

Weed Control in Established Alfalfa (Medicago sativa) with Postemergence Herbicides¹

Fitotoxicidad de herbicidas postemergentes sobre Adesmia bicolor (Poir.) DC y control de malezas asociadas

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Response of Seedling Alfalfa (Medicago sativa) to Four Postemergence Herbicides

Cited by 8 publications

References 10 publications

Effect of five postemergence herbicides on red clover shoot and root growth in greenhouse studies

Effect of five postemergence herbicides on red clover shoot and root growth in greenhouse studies

Weed Control in Established Alfalfa (Medicago sativa) with Postemergence Herbicides1

Fitotoxicidad de herbicidas postemergentes sobre Adesmia bicolor (Poir.) DC y control de malezas asociadas

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Weed Control in Established Alfalfa (Medicago sativa) with Postemergence Herbicides¹