Characterization of microorganisms in soils exhibiting accelerated pesticide degradation

Reed, J. P.; Kremer, Robert J.; Keaster, Armon J.

doi:10.1007/bf01855854

Cited by 12 publications

(3 citation statements)

References 14 publications

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“…The kinetic data derived from the first-order function (Figure 1) also showed that DZN dissipation increased remarkably, with a dissipation rate constant that changed from 0.06 to 0.14 d -1 and a t ½ that ranged from 10.8 to 4.9 days after the first and third applications respectively. This is a normal process that has been observed previously in soil contaminated with pesticides after repeated applications (Reed et al, 1987;Yu et al, 2009;Triky-Dotan et al, 2010), suggesting that the microorganisms present in the organic matrix adapt to the pesticide and metabolise it at an increasing rate. However, this phenomenon is not restricted to soil; accelerated pesticide dissipation has been also observed in biobed systems.…”

Section: Diazinon Dissipation In the Biomixturesupporting

confidence: 63%

Combined microbiological test to assess changes in an organic matrix used to avoid agricultural soil contamination, exposed to an insecticide

Salgado

Cuozzo

Mella-Herrera

et al. 2014

J. Soil Sci. Plant Nutr.

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Combined microbiological test (Biolog Ecoplate, denaturing gradient gel electrophoresis (DGGE) and Real Time PCR (qPCR)) were developed to evaluate the impact of repeated diazinon (DZN) applications at high concentration (40 mg kg-1) on microbial communities in a microcosm simulating the organic matrix (straw (50%): peat (25%): soil (25%) vv-1) of an pesticide biopurification system (PBS). Moreover, pesticide dissipation was also evaluated. After three successive exposition of DZN, dissipation efficiency was high; achieved 87%, 93% and 96% after each application, respectively showing a clear accelerated dissipation of this pesticide in the organic matrix. The results obtained with Biolog Ecoplate showed that community level physiological profiles were no affected by the addition of DZN. On the other hand, molecular assays (DGGE and QPCR) demonstrated that the microbial structure (bacteria and fungi) remained relatively stable over time with high DZN doses compared to control. Therefore, the results of the present study, clearly, demonstrate the high dissipation capacity of this biomixture and highlight the microbiological robustness of this biological system.Fil: Tortella, G. R.. Universidad de la Frontera. Nucleo Cientifico y Tecnologico En Recursos Naturales (bioren-ufro). Departamento de Ciencias Quimicas y Recursos Naturales; ChileFil: Salgado, E.. Universidad de la Frontera. Nucleo Cientifico y Tecnológico En Recursos Naturales; ChileFil: Cuozzo, Sergio Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tucumán. Planta Piloto de Procesos Industriales Microbiológicos (i); ArgentinaFil: Mella Herrera, R. A.. Universidad de la Frontera. Nucleo Cientifico y Tecnológico En Recursos Naturales; ChileFil: Parra, L.. Universidad de la Frontera. Núcleo Científico y Tecnológico en Recursos Naturales; ChileFil: Diez, M. C.. Universidad de la Frontera. Nucleo Cientifico y Tecnológico En Recursos Naturales; ChileFil: Rubilar, O.. Universidad de la Frontera. Nucleo Cientifico y Tecnológico En Recursos Naturales; Chil

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Section: Diazinon Dissipation In the Biomixturesupporting

confidence: 63%

Combined microbiological test to assess changes in an organic matrix used to avoid agricultural soil contamination, exposed to an insecticide

Salgado

Cuozzo

Mella-Herrera

et al. 2014

J. Soil Sci. Plant Nutr.

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“…The pesticide is of environmental concern due to its widespread use, persistence in soil, and frequent detection in ground and surface waters , . In past years, an accelerated degradation of pesticides resulting in reduced efficiency has been reported for a number of chemicals, such as carbofuran, 2,4-D, and isoproturon among others , . More recently, several papers have described similar enhanced atrazine degradation throughout the world .…”

Section: Introductionmentioning

confidence: 99%

Metabolism and Persistence of Atrazine in Several Field Soils with Different Atrazine Application Histories

Jablonowski

Hamacher

Martinazzo

et al. 2010

J. Agric. Food Chem.

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To assess the potential occurrence of accelerated herbicide degradation in soils, the mineralization and persistence of 14 C-labeled and non-labeled atrazine was evaluated over three months in two soils from Belgium (BS: atrazine treated 1973 BC: non-treated) and two soils from Germany (CK: atrazine treated 1986-1989; CM: non-treated). Prior to the experiment, accelerated solvent extraction of bulk field soils revealed atrazine (8.3 and 15.2 µg kg −1 in BS and CK soil), and a number of metabolites directly after field sampling, even in BC and CM soils without previous atrazine treatment, by means of LC-MS/MS analyses. For atrazine degradation studies, all soils were incubated under different moisture conditions (50% maximum soil water holding capacity -WHC max -/slurried conditions).At the end of the incubation, the 14 C-atrazine mineralization was high in BS soil (81% and 83%), and also unexpectedly high in BC soil (40% and 81%), at 50% WHC max and slurried conditions, respectively. In CK soil, the 14 C-atrazine mineralization was higher (10% and 6%) than in CM soil (4.7% and 2.7%), but was not stimulated by slurried conditions. The results revealed that atrazine application history dramatically influences its degradation and mineralization. For the incubation period, the amount of extractable atrazine, composed of residues from freshly applied atrazine and residues from former field applications, remained significantly greater (statistical significance = 99.5% and 99.95%) for BS and CK soils, respectively, than the amount of extractable atrazine in the bulk field soils. This suggests that i) mostly freshly applied atrazine is accessible for a complex microbial community, ii) the applied atrazine is not completely mineralized and remains extractable even in adapted soils, and iii) the microbial atrazine-mineralizing capacity strongly depends on atrazine application history and appears to be conserved on long time scales after the last application.

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“…However, research on the movement of cloethocarb in soil is necessary to ascertain if it would or would not leach and contaminate groundwater before this chemical could be recommended as an alternative to aldicarb. Furthermore, more research is needed to evaluate further its performance in other mineral and organic soils and to investigate the extent of microbial degradation, which cloethocarb has been shown to enhance (Gauger et al, 1986;Reed et al, 1987;Racke and Coats, 1988).…”

Section: Resultsmentioning

confidence: 99%

Persistence and uptake of cloethocarb in a mineral soil and its efficacy against the tuber flea beetle, Epitrix tuberis Gentner

Szeto¹,

Vernon²,

Price³

et al. 1991

J. Agric. Food Chem.

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Lance 15G (15% cloethocarb) at 2.0 and 4.0 g of ai/lO m of row was applied as an in-furrow band to potatoes (cv. Russet Burbank) a t planting in a silt loam to control the tuber flea beetle, Epitrix tuberis Gentner. Cloethocarb persisted in the soil for more than 64 days, and its disappearance followed first-order kinetics. The calculated rate constants and half-lives were 0.032 d a y 1 and 21.7 days at the low rate and 0.023 day-' and 30.1 days at the high rate. Cloethocarb was translocated readily into potato leaves. The ratio of cloethocarb concentration between the leaves and the treated soil was highest (3.35) in 37-day-old plants and lowest (0.90) in 65-day-old plants. The concentrations accumulated in the leaves were lethal to the adult beetles and effectively suppressed the populations of overwintered adults introduced to treated plants 28-30 days after planting. Almost complete adult mortality occurred within 24 h of beetle release, which resulted in a significant reduction of emergence of the next generation of adults. Control of beetles released onto treated plants 56 and 64 days after planting, however, was less effective.

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Characterization of microorganisms in soils exhibiting accelerated pesticide degradation

Cited by 12 publications

References 14 publications

Combined microbiological test to assess changes in an organic matrix used to avoid agricultural soil contamination, exposed to an insecticide

Combined microbiological test to assess changes in an organic matrix used to avoid agricultural soil contamination, exposed to an insecticide

Metabolism and Persistence of Atrazine in Several Field Soils with Different Atrazine Application Histories

Persistence and uptake of cloethocarb in a mineral soil and its efficacy against the tuber flea beetle, Epitrix tuberis Gentner

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