Biodegradation of Fenitrothion in Soil

Roy, Shalini; Kumar, Reena R.; Roy, Sharmila; Sharma, C. B.

doi:10.1002/(sici)1099-0801(199603)10:2<60::aid-bmc559>3.3.co;2-k

Cited by 3 publications

(3 citation statements)

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“…O, O-dimethyl-O-(3-methyl-4-amino) phosphate, formed by oxidation of the S atom with O in aminofenitrothion. Although direct oxidation of fenitrothion into fenitroxon has been reported in T. mossambica (Anjum and Qadri, 1986), in rainbow trout (Kanazawa, 1975), in Cyprinus carpio (Miyamoto et al, 1979) and in soil (Roy et al, 1996), our kinetic data favours formation of oxon through metabolite I. However, Kojima et al (1989) reported aminofenitrothion, amino-…”

Section: Characterization Of Metabolite By Infrared Spectroscopycontrasting

confidence: 52%

Biodegradation and bioaccumulation of fenitrothion in rat liver

Roy

Kumar

et al. 2004

Biomedical Chromatography

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The biodegradation of fenitrothion O,O-dimethyl-O-(3-methyl-4-nitro phenyl) phosphorothioate was investigated in rat liver after administration of various doses (5 mg/100 g body weight and 20 mg/100 g body weight) in acute treatment and 1 mg/100 g body weight in chronic treatment. High performance liquid chromatography of the pesticide and its metabolites formed in liver in acute treatment showed time-dependent sequential conversion of pesticide into three major metabolites within 24 h. These metabolites were separated and purified to homogenity by HPLC and characterized by IR spectroscopy as O,O-dimethyl-O-(3-methyl-4-amino phenyl) phsophorothioate (metabolite 1), O,O-dimethyl phosphorothioate (metabolite II) and O,O-dimethyl phosphate (metabolite III) in the fi rst dose (5 mg/100 g body weight). Metabolite II was found to be different in the second dose (20 mg/100 g body weight) and identified as O,O-dimethyl O-3-methyl-4-amino phenyl phosphate. The results with the fi rst dose indicated reduction of the nitro group in fenitrothion as step I followed by hydrolytic clevage of the P-O-aryl bond in metabolite I and oxidative desulphurylation of metabolite II. At higher dose (20 mg/100 g body weight) oxidative desulphurylation takes place as step II followed by hydrolysis of metabolite II. The bioaccumulation of fenitrothion within 60 days during chronic treatment showed no metabolite but continuous reduction in fenitrothion concentration, indicating excretion of pesticide and its products in urine and in faeces.

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Section: Characterization Of Metabolite By Infrared Spectroscopycontrasting

confidence: 52%

Biodegradation and bioaccumulation of fenitrothion in rat liver

Roy

Kumar

et al. 2004

Biomedical Chromatography

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“…Some degradation products of the pesticides considered here in various matrices have been described. For fenitrothion, many compounds have been identified and studied in soil, urine and water;2–7 a summary of the microbial metabolites and their mutagenicity has also been published 8. With respect to the dicarboximides vinclozoline and procymidone, 3,5‐dichloroaniline is often cited as a degradation product in water, plants, must and wine 9–13.…”

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confidence: 99%

Determination of impurities in pesticides and their degradation products formed during the wine‐making process by solid‐phase extraction and gas chromatography with detection by electron impact mass spectrometry. I. Vinclozoline, procymidone and fenitrothion

Jiménez

Bernal

Nozal

et al. 2004

Rapid Comm Mass Spectrometry

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The presence of degradation products of vinclozoline, procymidone and fenitrothion, and of impurities from their commercial formulations, was studied in white and red wines elaborated from spiked must. After solid-phase extraction the nature of the residues was established by gas chromatography with mass spectrometric detection. The structures of several degradation products and impurities are discussed and elucidated on the basis of their electron impact spectra. In elaborated wines the concentrations of the degradation products and impurities are lower than those of the original active ingredients. Aminofenitrothion and acetylamino-formyl-fenitrothion-oxon are the main residues of fenitrothion in wine. For dicarboximides, an alcohol derivative of vinclozoline was found in addition to 3,5-dichloroaniline.

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“…In addition, the lowest residue level of thiobencarb was detected at 84 th day (0.24 µg/g soil, 0.36% of the initial residue remaining). It was found that the pesticide degraded linearly with incubation time (Roy et al, 1996). Our results indicated that the dissipation rate of thiobencarb from the tested soil was greater than fenitrothion at the intial 5 day after treatment.…”

Section: Dissipation Of Fenitrothion and Thiobencarb In Soilmentioning

confidence: 56%

Comparison of Dissipation Kinetics and Residual Behaviour for Fenitrothion Insecticide and Thiobencarb Herbicide in Clay Soil

Aly

Fouad

Abou-Elnasr

et al. 2021

Alexandria Journal of Agricultural Sciences

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Comparsion study of the residual behaviour and kinetics of insecticide fenitrothion and herbicide thiobencarb in clay soil were carried out under laboratory conditions. The residues of the tested pesticides were determined by GC-MS at different interval times (0, 2, 5, 13, 20, 27, 48, 55 and 84 day) after treatment. The recoveries were performed at level of 75 μg/g soil and the recovery percentages were found to be 85.69 and 90.89 for fenitrothion and thiobencarb in the tested soil, respectively. The residue of fenitrothion was 64.27 µg/soil, after 48 days of incubation and the dropped to 5.07 % of the initial residue remaining. Thiobencarb residues level recorded after treated soil with 75 μg a.i / g soil wes 68.17 μg/g soil. This concentration gradually decreased with the time and reached to 0.68 μg/g soil at 55 days after treatment. Both compounds fenitrothion and thiobencarb disappeared very rapidly in the soil following a bi-phasic pattern. Graphical and integral methods were used to select the fit kinetic model. The determination coefficient R 2 was the highest and the SD of K values were the lowest in 1st order model compared to other kinetic models. Therefor, the dissipation of fenitrothion and thiobencarb in soil fits with the 1st-order kinetic model. The estimated value of fenitrothion half-life was 11.21 days and that of thiobencarb was 10.61 days. In general, the dissipation of thiobencarb was slightly faster in the tested soil than fenitrothion.

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Biodegradation of Fenitrothion in Soil

Cited by 3 publications

References 0 publications

Biodegradation and bioaccumulation of fenitrothion in rat liver

Biodegradation and bioaccumulation of fenitrothion in rat liver

Determination of impurities in pesticides and their degradation products formed during the wine‐making process by solid‐phase extraction and gas chromatography with detection by electron impact mass spectrometry. I. Vinclozoline, procymidone and fenitrothion

Comparison of Dissipation Kinetics and Residual Behaviour for Fenitrothion Insecticide and Thiobencarb Herbicide in Clay Soil

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