Field, laboratory and modelling studies to evaluate Aclonifen soil fate

Trevisan, Marco; Capri, E.; Cella, A.; Errera, Giuseppe; Sicbaldi, F.

doi:10.1080/02772249909358737

Cited by 9 publications

(16 citation statements)

References 6 publications

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“…The K oc value used for aclonifen was 1947 litre kg −1 22. This experimentally determined K oc value differs from that reported in other literature.…”

Section: Methodscontrasting

confidence: 58%

“…The measured sorption of the pesticides on the soil was approximately linear with concentration of pesticide (Freundlich exponent = 1.0 for ethoprophos and 0.75 for aclonifen), so for the purposes of modelling linear sorption was assumed. Trevisan et al 22 reported that sorption equilibrium was reached within only 4 h for aclonifen in a laboratory study, so instantaneous sorption was assumed for the modelling exercise. Under field conditions, sorption may take longer to reach equilibrium than in a batch study in the laboratory, but because of the high sorption coefficient of aclonifen, the effect of time‐dependent sorption is expected to be small.…”

Section: Methodsmentioning

confidence: 99%

“…Within the Po valley a field experiment using two pesticides, aclonifen (2‐chloro‐6‐nitro‐3‐phenoxyaniline) and ethoprophos ( O ‐ethyl S,S ‐dipropyl phosphorodithioate) has been carried out, and forms the basis of the current work 20. 21 These two pesticides have contrasting properties, aclonifen is usually considered immobile and persistent whilst ethoprophos is usually considered moderately mobile and non‐persistent 22. 23 Because aclonifen is immobile, it can be used in the evaluation of predictions of pesticide degradation in the surface layers of soil.…”

Section: Introductionmentioning

confidence: 99%

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Parameterisation, evaluation and comparison of pesticide leaching models to data from a Bologna field site, Italy

Garratt¹,

Capri²,

Trevisan³

et al. 2002

Pest Management Science

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Effective prediction of pesticide fate using mathematical models requires good process descriptions in the models and good choice of parameter values by the user. This paper examines the ability of seven pesticide leaching models (LEACHP, MACRO, PELMO, PESTLA, PLM, PRZM and VARLEACH) to describe an arable field environment where sunflowers are grown in the Po Valley, northern Italy. Two pesticides were considered, aclonifen and ethoprophos. The models were evaluated in terms of their ability to reproduce field data of soil water content and pesticide residues in the soil and ground water. The evaluation was based on a combination of calibrated and uncalibrated runs. The results from the models were compared with each other to explore the differences between the models. The models varied in their ability to predict soil water content in the summer: the capacity models PRZM, PELMO and VARLEACH predicted less drying than MACRO, PESTLA, PLM and LEACHP. The models varied in their ability to simulate the persistence of the pesticides in the soil. Differences in the simulated pesticide degradation rate were observed between the models, due to variations in the simulated soil water content and soil temperature, and also differences in the equation linking degradation rate to soil water content. There were large differences among the predictions of the models for the mean leaching depth of ethoprophos. PRZM, PELMO, PESTLA and LEACHP all showed similar mean leaching depth to each other, whereas VARLEACH predicted lower ethoprophos mobility and PLM and MACRO predicted greater mobility. All the models overpredicted dispersion of ethoprophos through the soil profile, as compared to the field data. None of the models was able to simulate the field data of rapid leaching of pesticide to ground water except PLM after calibration of the percentage of macropores in the mobile pore space. More work is required in the parameterisation of macropore flow for those models that include this process.

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“…The K oc value used for aclonifen was 1947 litre kg −1 22. This experimentally determined K oc value differs from that reported in other literature.…”

Section: Methodscontrasting

confidence: 58%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Parameterisation, evaluation and comparison of pesticide leaching models to data from a Bologna field site, Italy

Garratt¹,

Capri²,

Trevisan³

et al. 2002

Pest Management Science

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“…The sorption variation in the time was measured incubating the soil per 90 days (degradation trial) and then calculating the distribution coefficients (Kd) for each sampling point of the incubation trial using the OECD methodology [12].…”

Section: Time Dependent Sorptionmentioning

confidence: 99%

Imidacloprid and pyrimethanil soil sorption

et al. 2001

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-The sorption of imidacloprid and pyrimethanil was measured in different soils of southern Europe. Pyrimethanil sorption (Kf=1.2-4.60) was higher than that of imidacloprid (Kf=0.31-1.99). Sorption was influenced by organic carbon content and increased with time when the soil was incubated at 25°C and 35% soil water content. Over a period of 14 days, the distribution coefficient between solid (soil) and solution phases increased by orders of magnitude of 2 and 4 respectively, for imidacloprid and pyrimethanil. The increment is consistent with the degradation rate measured, supporting the hypothesis of the two sites of sorption. Care should be taken when such values are used to predict pesticide fate in soil, particularly for regulatory purposes during pesticide registration.

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“…The substances from this group do not exhibit high acute toxicity, but posses such adverse effects as teratogenity [4], endocrine disrupting behavior [5,6] and some are mutagenic [7] and even suspected carcinogens [8]. Aclonifen is used frequently for the protection of soybeans, corn, sunflowers, tomatoes and various other crops against weeds [9,10]. It is registered for use in many countries [11].…”

Section: Introductionmentioning

confidence: 99%

A Voltammetric Technique Using A Modified Carbon Paste Electrode For The Determination Of Aclonifen

Novotný

Barek

2015

Ecological Chemistry and Engineering S

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Abstract:A method for the determination of aclonifen at a carbon paste electrode modified with tricresyl phosphate has been developed. The optimum electrochemical regime proved to be differential pulse voltammetry (DPV) in the negative potential range from -200 to -1600 mV. The optimum pH for the determination proved to be pH = 8. The calibration dependence is linear and the limit of detection achieved for the method was 2·10 -6 mol/dm 3 . The method is fast, reliable and it is suitable for the detection of aclonifen in the concentration range from 2·10 -6 to 1·10 -4 mol/dm 3 .

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Field, laboratory and modelling studies to evaluate Aclonifen soil fate

Cited by 9 publications

References 6 publications

Parameterisation, evaluation and comparison of pesticide leaching models to data from a Bologna field site, Italy

Parameterisation, evaluation and comparison of pesticide leaching models to data from a Bologna field site, Italy

Imidacloprid and pyrimethanil soil sorption

A Voltammetric Technique Using A Modified Carbon Paste Electrode For The Determination Of Aclonifen

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