Dissipation of 2,4-D in soils of the Humid Pampa region, Argentina: A microcosm study

Merini, Luciano José; Cuadrado, Virginia Aznar; Flocco, Cecilia G.; Giulietti, Ana María

doi:10.1016/j.chemosphere.2007.01.012

Cited by 43 publications

(22 citation statements)

References 30 publications

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“…Similar results have been obtained by a number of researchers that used a range of herbicide concentrations in different agricultural soils (e.g. Ka et al (1995); Merini et al (2007); Macur et al (2007); Lerch et al (2009). One practical implication of the proliferation of soil microbes able to degrade some herbicides, such as www.intechopen.com foliar-applied chlorophenoxy acids, is that this phenomenon guarantees self-cleaning of herbicide-impacted agricultural soils, reducing the risk of contamination.…”

Section: Microbial Community Structuresupporting

confidence: 68%

“…Moreover, two soils with high glyphosate mineralization rates also showed high CFU counts (Gimsing et al, 2004). Conversely, low rates of 2,4-D (< 10 mg kg -1 soil) have no effects on heterotrophic bacteria counts (Ka et al, 1995;Merini et al, 2007;Zabaloy et al, 2010). The abundance of cellulose degraders and Azotobater were reported to decrease with 2,4-D treatment (Frioni, 1981), although the dose used was several times higher than the expected concentration in soil after a field rate application.…”

Section: Microbial Biomass and Abundancementioning

confidence: 99%

“…As a consequence, higher microbial biomass and activities are found in the rizosphere as opposed to bulk soil. Several studies have reported that rhizosphere enhances biodegradation of chlorophenoxyacetic acids (Shaw & Burns, 2004;Merini et al, 2007), metsulfuronmethyl (Ghani & Wardle, 2001) and atrazine (Piutti et al, 2002). Biodegradation pathways and strategies will be discussed in the following section.…”

Section: Spatial Distribution Of Microbial Populationsmentioning

confidence: 99%

See 2 more Smart Citations

Herbicides in the Soil Environment: Linkage between Bioavailability and Microbial Ecology

Zabaloy¹,

Zanini²,

Bianchinotti³

et al. 2011

Herbicides, Theory and Applications

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Section: Microbial Community Structuresupporting

confidence: 68%

Section: Microbial Biomass and Abundancementioning

confidence: 99%

Section: Spatial Distribution Of Microbial Populationsmentioning

confidence: 99%

See 1 more Smart Citation

Herbicides in the Soil Environment: Linkage between Bioavailability and Microbial Ecology

Zabaloy¹,

Zanini²,

Bianchinotti³

et al. 2011

Herbicides, Theory and Applications

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“…The average temperature in the region is 22°C, with rainfall of approximately 1800 mm/year. The field was divided into a grid and randomly sampled [10]. Soil samples from the top 0-20 cm were collected with a stainless steel soil tube drill with a diameter of 3 cm.…”

Section: Soil Samplesmentioning

confidence: 99%

Degradation of S-metolachlor and its Effects on Soil Enzymes and Microbial Communities in Vegetable Field Soil

Huang¹,

Cui²,

Zhou³

et al. 2017

JRST

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S-metolachlor is a promising alternative to metolachlor. However, the extensive use of S-metolachlor as herbicide in vegetable fields in China has caused concerns about its environmental fate. Here we investigated the effects of temperature, relative humidity (RH) and PH on the degradation rate of S-metolachlor in vegetable soil. The degradation rates of S-metolachlor increased with increasing temperatures and RH and either acidic or basic PH facilitates S-metolachlor degradation. The degradation of S-metolachlor under these conditions followed the first-order kinetics resulting in the half-lives (T-1/2) ranging from 12.18 d to 70.71 d at 5-35°C, and 27.28 d to 53.72 d at RH 30-90%; and 29.62-19.69 d at pH 6-8. Stronger response of soil enzymes including catalase, dehydrogenase, urease and cellulase to S-metolachlor was detected in soil with high organic matter. PLFA profiles showed that, totally, the microbe populations including actinomycetes, fungi and bacteria increased gradually in the first 14 days after the treatment and decreased from 14d to 28d after the treatment. All the S-metolachlor treatments caused the increase of aerobe and anaerobe. High S-metolachlor concentration, 13.9 mg/kg, could cause significant variation at the first 2 weeks, stimulating growth of the entire soil microbial community. These findings might have practical implications for the fate of S-metolachlor residue in vegetable fields. Environmental factors, especially temperature, relative humidity and pH should be considered in combination with the appropriate application dose of S-metolachlor for achieving satisfactory weed-control efficacy, reducing runoff, and minimizing effects on environmental quality.

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“…O ácido 2,4-diclorofenoxiacético (2,4-D) destaca-se entre os herbicidas por ser um dos mais empregados no setor agrícola (MERINI et al, 2007). Esse herbicida altamente seletivo, sistêmico e pós-emergente, é bastante utilizado na região Sul do Maranhão em diversas culturas agrícolas.…”

Section: Introductionunclassified

Biodegradação Do Herbicida 2,4-D Utilizando Bactérias Selecionadas Do Solo Do Cerrado Maranhense

Araújo

Orlanda²

2014

PES

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O presente trabalho visou avaliar a biodegradação do herbicida 2,4 diclorofenoxiacético (2,4-D) por linhagens bacterianas isoladas de solo do Cerrado Maranhense. Os micro-organismos selecionados para biodegradação do herbicida 2,4-D em meios de cultura sólidos mostraram-se efi cazes. As linhagens bacterianas oriundas do solo de cultivo de feijão (F5 e F7) e de mandioca (M5 e M6) foram as que melhor se adaptaram aos meios de cultura contendo o herbicida. Quando se adicionou fonte extra de carbono e nitrogênio verifi couse melhor crescimento dos micro-organismos na presença de 2,4-D. Todos os micro-organismos foram efi cazes na inativação do herbicida, sendo a linhagem F7 a que apresentou maior percentual de biodegradação do 2,4-D (92 %).

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Dissipation of 2,4-D in soils of the Humid Pampa region, Argentina: A microcosm study

Cited by 43 publications

References 30 publications

Herbicides in the Soil Environment: Linkage between Bioavailability and Microbial Ecology

Herbicides in the Soil Environment: Linkage between Bioavailability and Microbial Ecology

Degradation of S-metolachlor and its Effects on Soil Enzymes and Microbial Communities in Vegetable Field Soil

Biodegradação Do Herbicida 2,4-D Utilizando Bactérias Selecionadas Do Solo Do Cerrado Maranhense

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