The formation of bound residues of diazinon in four UK soils: Implications for risk assessment

Fenlon, Katie A.; Andreou, Kostas; Jones, Kevin C.; Semple, Kirk T.

doi:10.1016/j.envpol.2010.11.039

Cited by 17 publications

(6 citation statements)

References 34 publications

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“…Herbicides that penetrate the soil can affect the population size and activity of soil microbes. Modern herbicides are characterized by high biological activity and selectivity, but their inappropriate and excessive use may have adverse environmental effects (Ayansina and Amusan 2013 ; Baćmaga et al 2014a ; Bai et al 2013 ; Cycoń et al 2010a ; Fenlon et al 2011 ; Morgante et al 2012 ). The active ingredients of herbicides applied in combination may produce additive or synergistic effects, leading to short-term or long-term changes in the biological equilibrium of soil (Tejada 2009 ).…”

Section: Introductionmentioning

confidence: 99%

Microbial and enzymatic activity of soil contaminated with a mixture of diflufenican + mesosulfuron-methyl + iodosulfuron-methyl-sodium

Baćmaga

Borowik

Kucharski

et al. 2014

Environ Sci Pollut Res

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The aim of this study was to determine the effect of three active substances, diflufenican, mesosulfuron-methyl and iodosulfuron-methyl-sodium, applied in combination, on soil microbial counts, the structure of soil microbial communities, activity of soil enzymes and their resistance to the tested product, the biochemical indicator of soil fertility, and spring wheat yield. Soil samples with the granulometric composition of sandy loam with pHKCl 7.0 were used in a pot experiment. The herbicide was applied to soil at seven doses: 0.057 (dose recommended by the manufacturer), 1.140, 2.280, 4.560, 9.120, 18.240 and 36.480 mg kg−1 soil DM. Uncontaminated soil served as the control treatment. It was found that a mixture of the tested active substances increased the counts of total oligotrophic bacteria and spore-forming oligotrophic bacteria, organotrophic bacteria and actinomycetes, decreased the counts of Azotobacter and fungi, and modified the structure of soil microbial communities. The highest values of the colony development (CD) index and the ecophysiological (EP) index were observed in fungi and organotrophic bacteria, respectively. The herbicide applied in the recommended dose stimulated the activity of catalase, urease and acid phosphatase, but it had no effect on the activity of dehydrogenases, alkaline phosphatase, arylsulfatase and β-glucosidase. The highest dose of the analyzed substances (36.480 mg kg−1) significantly inhibited the activity of dehydrogenases, acid phosphatase, alkaline phosphatase and arylsulfatase. The values of the biochemical soil fertility indicator (BA21) decreased in response to high doses of the herbicide. Urease was most resistant and dehydrogenases were least resistant to soil contamination with a mixture of diflufenican + mesosulfuron-methyl + iodosulfuron-methyl-sodium. The analyzed herbicide had an adverse influence on spring wheat yield, and doses of 18.240 and 36.480 mg kg−1 led to eventual death of plants.

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Section: Introductionmentioning

confidence: 99%

Microbial and enzymatic activity of soil contaminated with a mixture of diflufenican + mesosulfuron-methyl + iodosulfuron-methyl-sodium

Baćmaga

Borowik

Kucharski

et al. 2014

Environ Sci Pollut Res

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“…The minimum limit of chlorpyrifos detection is 1.57µM and limit of quanti cation is 5.24µM at 45 0 C. Also, the obtained maximum selectivity coe cients is 2.846 at 35 0 C. It is also observed that the chlorpyrifos detection sensitivity increases with temperature. The obtained maximum sensitivity of this waveguide is 5.66 degree/µM at 45 0 C. It is reviewed that ultrasonic radiation, pH, biodegradation and temperature can rapidly and effectively destroy chlorpyrifos in aqueous solution [26][27]. The ideal conditions for chlorpyrifos pesticide breakdown at eld capacity are between 30-40ºC and 50-90% humidity [28].…”

Section: Resultsmentioning

confidence: 99%

MoS2 coated planar polymer optical waveguide sensor utilizing common path interferometric principle for chlorpyrifos detection

Upadhyay

Yadav

Maurya

et al. 2022

Preprint

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A common path Mach-Zehnder interferometer is fabricated using planer polymer waveguide having MoS2 as an adlayer for chlorpyrifos detection. The dispersion characteristic and cutoff condition of proposed waveguide is obtained theoretically and hence the cutoff film thickness is optimised to get TE0 and TM0 propagating modes. Variation between the phase shift of propagating modes with the concentration of pure chlorpyrifos and its real commercial sample are obtained. A good linear variation between phase shift and concentration of chlorpyriphos is obtained in our fabricated waveguide for all considered temperatures. The obtained maximum sensitivity, minimum limit of detection and limit of quantification of chlorpyrifos is 5.66 degree/µM, 1.57µM and 5.24µM respectively, at 450C. The capability of the fabricated sensor to generate distinct response for pure and real sample of chlorpyrifos at different concentration and temperature were confirmed by principal component analysis. Since the response of sensor is better for real sample at lower temperature, therefore it is recommended that the concentration of chlorpyrifos in real sample should be measure at low temperature.

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“…The decline in viable count could be attributed to the effects of diazinon toxicity on the microorganisms. Even though, there is limited literature on effects of diazinon in suppressing microbial populace, Ingram et al ( 2005 ) and Fenlon et al ( 2011 ) reported that, the pesticide influence urease enzyme activities of the soil dwelling organisms and mineralization process respectively. Similarly, Storck et al ( 2018 ) found that, chlorpyrifos which has similar structure as diazinon, restrained growth of bacterial community in soil.…”

Section: Discussionmentioning

confidence: 99%

Degradation kinetics and physiological studies of organophosphates degrading microorganisms for soil bioremediation

Kilonzi,

Otieno

2024

Stress Biology

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Organophosphate compounds are widely used in agricultural activities to optimize food production. Contamination of field soil by these compounds may result in detrimental effects on soil biota. The aim of the present study was to isolate microorganisms from field soils and evaluate the strains on ability to degrade organophosphates as single isolate and as a consortium. Isolated strains were identified using both biochemical and molecular techniques. Results revealed that, out of the 46 isolated strains, three isolates herein referred to as S6, S36 and S37 showed an average diazinon degradation rate of 76.4%, 76.7% and 76.8% respectively, of the initial dose (50 ppm) within 11 days of incubation in mineral medium. Notably, isolates S36 and S37 were more effective than S6 in degrading diazinon by 40% in soil aliquot after 11 days and therefore were evaluated on biochemical reactions and molecular identification. The isolates showed variable biochemical characteristics. However, both isolates possessed catalase enzyme, but lacked oxidase enzyme. Molecular characterization showed that, the closest species for S36 and S37 were Priestia megaterium and P. arybattia, respectively, based on 16S rRNA gene similarity (> 99%). Combination of the strains increased diazinon degradation ability by 45% compared to single strain treatment. Chlorpyrifos was the most highly degraded organophosphate, compared to phorate and cadusafos. Therefore it is expected that the pesticide-degrading bacteria could be a solution to soil health improvement and contribution to the production of safe agricultural products.

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The formation of bound residues of diazinon in four UK soils: Implications for risk assessment

Cited by 17 publications

References 34 publications

Microbial and enzymatic activity of soil contaminated with a mixture of diflufenican + mesosulfuron-methyl + iodosulfuron-methyl-sodium

Microbial and enzymatic activity of soil contaminated with a mixture of diflufenican + mesosulfuron-methyl + iodosulfuron-methyl-sodium

MoS2 coated planar polymer optical waveguide sensor utilizing common path interferometric principle for chlorpyrifos detection

Degradation kinetics and physiological studies of organophosphates degrading microorganisms for soil bioremediation

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