Navigating a Critical Juncture for Sustainable Weed Management

Mortensen, David A.; Egan, J. Franklin; Maxwell, Bruce D.; Ryan, Matthew R.; Smith, Richard G.

doi:10.1525/bio.2012.62.1.12

Cited by 301 publications

(308 citation statements)

References 31 publications

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“…In the past few decades, herbicides have been used almost exclusively in weed management (Valantine-Morison et al 2008). But herbicides have been compromising the agroecosystem's sustainability (Mortensen et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Effect of Winter Cover Crop Biomass on Summer Weed Emergence and Biomass Production

Bittencourt¹,

Lovato²,

Comin³

et al. 2013

Journal of Plant Protection Research

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A greenhouse assay was carried out to evaluate the effect of winter cover crop residues on spontaneous plants that commonly occur on summer annual fields in Southern Brazil. Dry shoot residues of rye (Secale cereale), vetch (Vicia villosa), fodder radish (Raphanus sativus), and a mix of the three species, were applied over pots that had been seeded with alexandergrass (Brachiaria plantaginea), hairy beggarticks (Bidens pilosa), wild poinsettia (Euphorbia heterophylla), and morning glory (Ipomoea grandifolia) at four dif-

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Section: Introductionmentioning

confidence: 99%

Effect of Winter Cover Crop Biomass on Summer Weed Emergence and Biomass Production

Bittencourt¹,

Lovato²,

Comin³

et al. 2013

Journal of Plant Protection Research

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“…Every year number of new studies are reported explaining different mechanisms related to toxic actions of 2,4-D, a common herbicide on plants, animals and human cells (Fantel 1996;Don-Pedro 1996;Coppen and Jepsons 1996;Schrader et al 1999;Heiden et al 2006;Hardell 2008;Cogliano et al 2011;Mortensen et al 2012;Von Stackelberg 2013;Song 2014). Degradation by soil micro organisms is assumed as main cause of 2,4-D decomposition in soil.…”

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confidence: 99%

Does 2,4-dichlorophenoxyacetic acid (2,4-D) induce genotoxic effects in tissue cultured Allium roots?

et al. 2016

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2,4-Dichlorophenoxyacetic acid (2,4-D) is a synthetic plant growth regulator that is highly toxic to most broad leaved plants and relatively nontoxic to monocotyledonous plants; is frequently used as weed killer. The study aimed to investigate cytogenetic effects of different concentrations of 2,4-D (0.67, 1.34, 2.01, 2.68, 3.35 and 4.02 mg/L) on Allium cepa bulblets' root tips treated for 24 and 48 h. The results showed six types of structural aberrations: C-mitosis, stickiness, laggards, bridges, fragments and multipolarity that varied numerically compared to control. It significantly affected mitotic index (MI) at 24 and 48 h treatment. In the Allium test, MI increased significantly at three lower concentrations (0.67, 1.34, 2.01 mg/L) after treatment with 2,4-D for 24 h and decreased significantly at higher concentration. Whereas, 2,4-D treatment for 48 h increased MI at all concentrations with significantly decreased MI at the highest concentration. The experiment was extended using comet test that did not reveal significant difference among treatments except for application of 4.02 mg/L 2,4-D for 48 h; where cell damages were verified by comet test. Rest of the concentrations for any duration of time were not damaging and toxic to cells. The results showed, visible mitodepressive action of 4.02 mg/L 2,4-D when treated for 48 h that had tendency to become toxic if the roots had been in touch with 2,4-D for a longer time.

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“…Juntamente com a revolução verde, ele contribuiu para a elevação da produção dos cereais nas décadas posteriores a 1950 (Sterling & Hall, 1997). Esse produto é uma auxina sintética que pode ser utilizada como regulador de crescimento vegetal ou como herbicida para o controle de espécies daninhas dicotiledôneas (Mortensen et al, 2012). O principal mecanismo apontado para ação desse herbicida nas plantas é a estimulação da produção de ácido1-carboxílico-1-aminociclopropano (ACC) sintase, enzima responsável pela biossíntese do hormônio etileno.…”

Section: Introductionunclassified

“…Várias espécies infestantes dicotiledôneas que apresentam dificuldade de controle com outros herbicidas são suscetíveis ao 2,4-D (Mortensen et al, 2012;Heap, 2014). Contudo, a utilização deste herbicida fica restrita pela falta de seletividade em algumas culturas agrícolas.…”

Section: Introductionunclassified

O desenvolvimento de culturas tolerantes ao herbicida diclorofenoxiacetato: revisão de literatura

Queiroz

Vidal

2014

Planta daninha

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RESUMO -O composto diclorofenoxiacetato (2,4-D) foi o primeiro herbicida orgânico, sistêmico, seletivo e de aplicação em pós-emergência desenvolvido no mundo. Juntamente com a revolução verde, ele contribuiu para elevar a produção dos cereais nas décadas posteriores a 1950. Esse produto é uma auxina sintética que pode ser utilizada como regulador do crescimento vegetal ou, ainda, como herbicida para o controle de espécies daninhas dicotiledôneas. Várias espécies infestantes dicotiledôneas que apresentam dificuldade de controle com outros herbicidas são suscetíveis ao 2,4-D. Contudo, a utilização desse herbicida fica restrita pela falta de seletividade em algumas culturas agrícolas. Nas últimas décadas, a descoberta de genes relacionados à tolerância ao 2,4-D em bactérias encontradas no solo e a sua transferência para culturas possibilitaram o desenvolvimento de linhagens tolerantes ao produto. Os objetivos desta revisão de literatura foram apresentar os genes e a atividade das enzimas responsáveis pela tolerância ao herbicida 2,4-D; ilustrar os mecanismos envolvidos na seletividade ao 2,4-D e a outros herbicidas; e equacionar algumas implicações para o manejo de plantas daninhas. ABSTRACT -The compound dichlorophenoxyacetate (2,4-D) was the first organic, systemic, selective herbicide, and for post-emergence application to be developed in the world. Along with the green revolution, this herbicide has helped to increase the cereal production on the decades after 1950. This product is a synthetic auxin that can be used as a plant growth regulator or as an herbicide for

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Navigating a Critical Juncture for Sustainable Weed Management

Cited by 301 publications

References 31 publications

Effect of Winter Cover Crop Biomass on Summer Weed Emergence and Biomass Production

Effect of Winter Cover Crop Biomass on Summer Weed Emergence and Biomass Production

Does 2,4-dichlorophenoxyacetic acid (2,4-D) induce genotoxic effects in tissue cultured Allium roots?

O desenvolvimento de culturas tolerantes ao herbicida diclorofenoxiacetato: revisão de literatura

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