The Degradation of Triazine and Uracil Herbicides in Soil*

Zimdahl, Robert L.; Freed, V. H.; Montgomery, M. W.; Furtick, W. R.

doi:10.1111/j.1365-3180.1970.tb00919.x

Cited by 65 publications

(30 citation statements)

References 14 publications

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“…The same results were also observed 84 days after pendimethalin application (P = 0.056). Similar results were presented by Zimdahl and Clark (1984). They found no effect of pendimethalin dose (1.2 and 2.4 kg/ha) on its half-life calculated 45 days after pendimethalin application.…”

Section: Resultssupporting

confidence: 78%

“…Other factors such as cultivation practices, mode of doi: 10.17221/226/2015-SWR (Piutti et al 2002), and herbicide incorporation into the soil after its application (Talbert & Press 1997), or application of Fenton's reagent (Miller et al 1996) can affect the pendimethalin half-life. The effect of soil moisture and soil temperature was described by Zimdahl and Clark (1984). They described increased pendimethalin degradation with the increase of both soil moisture and temperature, and they suggested that soil type may have less influence than temperature and soil moisture.…”

mentioning

confidence: 99%

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Pendimethalin degradation in soil and its interaction with soil microorganisms

Kočárek¹,

Artikov²,

Voříšek³

et al. 2016

Soil Water Res.

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Pendimethalin [N-(1-ethylpropyl)-3,4-dimethyl-2, 6-dinitrobenzenamine] is a herbicide used worldwide to control most annual grasses and common weeds in cereals, fruit, and vegetables. Its degradation in Haplic Chernozem under controlled greenhouse conditions was studied in this paper. The effect of recommended and doubled pendimethalin doses, as well as the effect of the biopreparate EM-EKO ProBio Plus on pendimethalin degradation in soil and on soil microorganisms was investigated. Pendimethalin half-life ranged from 24.4 to 34.4 days and the double dose did not increase the pendimethalin half-life. Thirty-eight days after pendimethalin application there was no statistical difference between the pendimethalin concentration in soil when applied at the recommended and doubled dose. No effect of pendimethalin on the amount or the activity of soil microorganisms was observed. The effect of EM-EKO ProBio Plus was apparent only on the first sampling of double-dose pendimethalin, however, this bio-preparate had no significant effect on the half-life of pendimethalin, as observed at the end of the experiment.

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Section: Resultssupporting

confidence: 78%

mentioning

confidence: 99%

Pendimethalin degradation in soil and its interaction with soil microorganisms

Kočárek¹,

Artikov²,

Voříšek³

et al. 2016

Soil Water Res.

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“…The degradation product of metolachlor, 2-hydroxy-N-(2-ethyl-6-methylphenyl)-N-(hydroxyprop-2-yl) acetamide, was prepared as follows: i) KI [10], and Vischetti and Businelli [9]. The influence of temperature and soil moisture on degradation was evident.…”

Section: Identification Of Degradation Productsmentioning

confidence: 99%

Degradation and mobility of metolachlor and terbuthylazine in a sandy clay loam soil

et al. 1998

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-The degradation of metolachlor and terbuthylazine, two maize herbicides, was studied in laboratory in a sandy clay loam soil under different temperature and soil moisture conditions and in drainage field lysimeters. Identification of the main degradation products of the two herbicides was attempted both in laboratory and field lysimeter soil samples. The results show that the degradation of the two herbicides in laboratory followed a first order kinetics influenced by temperature and soil moisture. Metolachlor disappeared in soil more rapidly than terbuthylazine. Metolachlor moved more rapidly than terbuthylazine through the soil profile in field lysimeters and noticeable quantities were found in drainage water. In the laboratory degradation studies, the main degradation products of both herbicides were found in soil samples as early as the first week of incubation, while in the field lysimeter studies only the degradation product of terbuthylazine was found in soil samples. ( (Piacenza)

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“…Biodegradation is the primary means of metolachlor dissipation in soil [11][12][13][14]. Factors that influence microbial activity, especially soil temperature and moisture content, in turn influence the persistence of metolachlor [13,15]. Pesticides may also affect soil microbial activity depending on the rate of application, persistence, availability, and toxicity of the compound.…”

Section: Introductionmentioning

confidence: 99%

Degradation and persistence of metolachlor in soil: Effects of concentration, soil moisture, soil depth, and sterilization

Rice

Anderson

Coats

2002

Enviro Toxic and Chemistry

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The present study evaluated the influence of soil depth, soil moisture, and concentration on the persistence and degradation of metolachlor in soil. Greater percentages of metolachlor persisted in subsurface soils than in surface soil regardless of the soil moisture or initial herbicide concentration. Larger quantities of bound residues and extractable degradation products were found in the surface soils as a result of the increased soil sorption and biodegradation of metolachlor associated with the surface soil, which had more organic matter. Saturated soil favored the dissipation of metolachlor and the formation of soil-bound residues. Significantly greater quantities of a dechlorinated metabolite were measured in the saturated surface soil compared to the unsaturated soil. Mineralization of metolachlor to CO2 and volatilization of metolachlor or metolachlor degradates was minimal in surface and subsurface soils at both soil moistures and herbicide concentrations. Increased metolachlor concentrations did not inhibit microbial activity; however, the greater rate of application did result in the reduced percentage of applied [14C]metolachlor that was bound to surface or subsurface soil. A significant reduction in the quantity of extractable metolachlor degradates and unextractable soil-bound residues in sterile soil revealed the significance of biodegradation to the dissipation of metolachlor in soil.

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The Degradation of Triazine and Uracil Herbicides in Soil*

Cited by 65 publications

References 14 publications

Pendimethalin degradation in soil and its interaction with soil microorganisms

Pendimethalin degradation in soil and its interaction with soil microorganisms

Degradation and mobility of metolachlor and terbuthylazine in a sandy clay loam soil

Degradation and persistence of metolachlor in soil: Effects of concentration, soil moisture, soil depth, and sterilization

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