How weather conditions and physico-chemical properties control the leaching of flufenacet, diflufenican, and pendimethalin in a tile-drained landscape

Willkommen, Sandra; Pfannerstill, Matthias; Ulrich, Uta; Guse, Björn; Fohrer, Nicola

doi:10.1016/j.agee.2019.03.017

Cited by 29 publications

(24 citation statements)

References 43 publications

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“…1a). Some authors have reported rainfall's major influence on overall leachate losses in the period shortly after the application of chemicals (Walker et al, 2005;Willkommen et al, 2019). The Brbehaviour in both amended soils indicated lower mobility than that in S and it is consistent with the slower water percolation observed in these soils through the soil profile, as previously indicated A hypothetical loss of Brby leaching below 1 m linked to the accumulated rainfall of 203.4 mm from 80 to 339 days could be responsible for the low Brbalances after 80 days.…”

Section: Mobility Of Ion Bromide In Soil Profiles: Influence Of Soil Water Contentmentioning

confidence: 99%

“…This herbicide has a higher hydrophobicity and persistence in soil than CTL, but a lower leachability (PPDB, 2019). FNC has also been detected in surface waters (Casado et al, 2019), while it is unlikely to leach to groundwater (Gajbhiye and Gupta, 2001;Novohatska et al, 2018), hence this may depend on weather conditions, the time lapse between the application date and the first precipitation event, and soil properties (USEPA, 1998;Milan et al, 2015;Willkommen et al, 2019). However, FNC degrades in the soil mainly into two metabolites, flufenacet oxoacetic acid (FNC-OA) and flufenacet oxoethanesulfonic acid (FNC-ESA), with a higher or much higher potential, respectively, for leaching to groundwater than FNC (EC, 2003;PPDB, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…In turn, and to the best of our knowledge, the effect of organic amendments on the mobility of this herbicide has been assessed in a somewhat unusual manner, involving only packed soil cores under controlled laboratory conditions (Kodešová et al, 2012). By contrast, only a handful of studies have been published on FNC mobility in soil (Rouchaud et al, 1999;Vasilakoglou et al, 2001;Milan et al, 2015;Willkommen et al, 2019), and none including amended soils.…”

Section: Introductionmentioning

confidence: 99%

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Mobility monitoring of two herbicides in amended soils: A field study for modeling applications

Carpio

Rodríguez‐Cruz

García‐Delgado

et al. 2020

Journal of Environmental Management

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Highlights Herbicide concentrations were evaluated in soil profiles for 2 years along with Brtracer ion and water content  Organic residues increased the soil's water-holding capacity and the herbicide adsorption by topsoil  Herbicide transport increased by soluble organic carbon, initial soil moisture and rainfall  Leaching, degradation and other processes could be involved in the chemicals' dissipation in soils  The data set obtained is needed to simulate pesticide environmental fate with leaching models

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Section: Mobility Of Ion Bromide In Soil Profiles: Influence Of Soil Water Contentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mobility monitoring of two herbicides in amended soils: A field study for modeling applications

Carpio

Rodríguez‐Cruz

García‐Delgado

et al. 2020

Journal of Environmental Management

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“…So far, PC and their TP have been quantified in different water types including drinking water (Rodriguez-Mozaz et al 2004;Reemtsma et al 2013a), groundwater (Albanis et al 1998;Bottoni et al 2013;Farlin et al 2017), surface water (Olsson et al 2013;Reemtsma et al 2013b;Masiá et al 2015), and in soil (Marín-Benito et al 2019;Silva et al 2019;Willkommen et al 2019). These observations in different compartments were carried out as singular sampling or in low temporal resolution and were isolated from each other.…”

Section: Introductionmentioning

confidence: 99%

Omnipresent distribution of herbicides and their transformation products in all water body types of an agricultural landscape in the North German Lowland

Ulrich

Pfannerstill

Ostendorp³

et al. 2021

Environ Sci Pollut Res

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The research of the environmental fate of pesticides has demonstrated that applied compounds are altered in their molecular structure over time and are distributed within the environment. To assess the risk for contamination by transformation products (TP) of the herbicides flufenacet and metazachlor, the following four water body types were sampled in a small-scale catchment of 50 km2 in 2015/2016: tile drainage water, stream water, shallow groundwater, and drinking water of private wells. The TP were omnipresent in every type of water body, more frequently and in concentrations up to 10 times higher than their parent compounds. Especially metazachlor sulfonic acid, metazachlor oxalic acid, and flufenacet oxalic acid were detected in almost every drainage and stream sample. The transformation process leads to more mobile and more persistent molecules resulting in higher detection frequencies and concentrations, which can even occur a year or more after the application of the parent compound. The vulnerability of shallow groundwater and private drinking water wells to leaching compounds is proved by numerous positives of metazachlor-TP with maximum concentrations of 0.7 μg L−1 (drinking water) and 20 μg L−1 (shallow groundwater) of metazachlor sulfonic acid. Rainfall events during the application period cause high discharge of the parent compound and lower release of TP. Later rainfall events lead to high displacement of TP. For an integrated risk assessment of water bodies, the environmental behavior of pesticide-TP has to be included into regular state-of-the-art water quality monitoring.

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“…They are often termed “micropollutants” because they occur in the range of micrograms per liter (Schwarzenbach et al 2006). The interplay of intermittent use patterns and environmental fate processes results in highly time‐variable exposure concentrations in water bodies, in particular for pesticides in small streams (Kreuger 1998; Leu et al 2004; Gilliom et al 2007; Wittmer et al 2010; Spycher et al 2018; Willkommen et al 2019). Assessing the risk to the environment of these chemicals requires measuring their presence in water bodies and establishing their temporal concentration profile.…”

Section: Introductionmentioning

confidence: 99%

Effect Modeling Quantifies the Difference Between the Toxicity of Average Pesticide Concentrations and Time‐Variable Exposures from Water Quality Monitoring

Ashauer

Kuhl²,

Zimmer³

et al. 2020

Enviro Toxic and Chemistry

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Synthetic chemicals are frequently detected in water bodies, and their concentrations vary over time. Water monitoring programs typically employ either a sequence of grab samples or continuous sampling, followed by chemical analysis. Continuous time-proportional sampling yields the time-weighted average concentration, which is taken as proxy for the real, time-variable exposure. However, we do not know how much the toxicity of the average concentration differs from the toxicity of the corresponding fluctuating exposure profile. We used toxicokinetic-toxicodynamic models (invertebrates, fish) and population growth models (algae, duckweed) to calculate the margin of safety in moving time windows across measured aquatic concentration time series (7 pesticides) in 5 streams. A longer sampling period (14 d) for time-proportional sampling leads to more deviations from the real chemical stress than shorter sampling durations (3 d). The associated error is a factor of 4 or less in the margin of safety value toward underestimating and an error of factor 9 toward overestimating chemical stress in the most toxic time windows. Under-and overestimations occur with approximate equal frequency and are very small compared with the overall variation, which ranged from 0.027 to 2.4 × 10 10 (margin of safety values). We conclude that continuous, time-proportional sampling for a period of 3 and 14 d for acute and chronic assessment, respectively, yields sufficiently accurate average concentrations to assess ecotoxicological effects.

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How weather conditions and physico-chemical properties control the leaching of flufenacet, diflufenican, and pendimethalin in a tile-drained landscape

Abstract: How weather conditions and physico-chemical properties control the leaching of flufenacet, diflufenican,

Cited by 29 publications

References 43 publications

Mobility monitoring of two herbicides in amended soils: A field study for modeling applications

Mobility monitoring of two herbicides in amended soils: A field study for modeling applications

Omnipresent distribution of herbicides and their transformation products in all water body types of an agricultural landscape in the North German Lowland

Effect Modeling Quantifies the Difference Between the Toxicity of Average Pesticide Concentrations and Time‐Variable Exposures from Water Quality Monitoring

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