Assessing surface and subsurface transport of neonicotinoid insecticides from no‐till crop fields

Frame, Sarah T.; Pearsons, Kirsten A.; Elkin, Kyle R.; Saporito, Louis S.; Preisendanz, Heather E.; Karsten, Heather D.; Tooker, John F.

doi:10.1002/jeq2.20185

Cited by 14 publications

(7 citation statements)

References 45 publications

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“…In terms of timing, SOC appeared to have the most pronounced influence on insecticide transport the early‐season sampling events, which may be most analogous to the “spring flush” often observed in the literature (Hladik et al., 2014; Thurman et al., 1992). This period is particularly critical because seed‐coating chemicals are typically present in relatively high concentrations (Frame et al., 2021) and soil water content is often elevated (Findell & Eltahir, 1997). We note that the “spring flush” phenomenon is not exclusive to the season in which coated seeds are planted because TMX and CLO have both been detected in runoff and tile drain water in the second year after planting TMX‐coated seeds (Chrétien et al., 2017).…”

Section: Discussionmentioning

confidence: 99%

Soil organic matter can delay—but not eliminate—leaching of neonicotinoid insecticides

2022

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Soil organic matter (SOM) retains and attenuates many contaminants; however, its interactions with neonicotinoid insecticides under field conditions remain poorly understood. The goal of this study was to determine if SOM influences the persistence or leaching of two neonicotinoid insecticides: thiamethoxam (TMX) and its transformation-product clothianidin (CLO). Thiamethoxam-coated soybean [Glycine max (L.) Merr.] was planted into a clay soil containing different soil organic carbon (SOC) concentrations. Leachate and soil samples were collected for 10 wk after planting and were analyzed for insecticide concentrations using liquid chromatography-tandem mass spectrometry. Single and multiple linear regressions were performed between SOC, leaching volumes, and measured insecticide concentrations, focusing on rainfall events near the beginning, middle, and end of the study.Correlations were also tested between SOC and cumulative mass of leached insecticides. Neither SOC nor per-event leachate volumes explained variability in TMX leaching or residual CLO concentrations in soils; however, by the conclusion of the study residual thiamethoxam concentrations in soil were negatively correlated with cumulative volume of leached water. Initially, the concentration and total mass of leached CLO were significantly and negatively correlated with SOC content; however, this effect faded with time. Leachate dynamics also affected CLO transport, with positive correlations between leachate volume and CLO concentration during the latter events. This analysis demonstrates that SOM can reduce peak loading of neonicotinoids but may not alter cumulative leaching over the entire growing season. INTRODUCTIONRow crop seeds used in production agriculture typically come with an insecticidal coating and a fungicidal component. Fungicides are meant to control soil-borne fungal pathogens,

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Section: Discussionmentioning

confidence: 99%

Soil organic matter can delay—but not eliminate—leaching of neonicotinoid insecticides

2022

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“…The grass and wetland sample concentrations for field MH 2 were 28% and 74% lower, respectively, than the upgradient OLF-F concentration. The decreased imidacloprid concentrations in the riparian zone, as compared to the concentrations in the fields where the imidacloprid-coated corn seeds were planted, are likely due to subsurface flow rather than surface runoff being the dominant transport pathway for imidacloprid (Frame et al, 2021), as compared to atrazine and metolachlor. It is unlikely that imidacloprid was bound to sediment that was transported during surface runoff, as the mobilized imidacloprid originated from the planted seeds below the soil surface.…”

Section: Imidaclopridmentioning

confidence: 94%

Role of Concentrated Flow Pathways on the Movement of Pesticides through Agricultural Fields and Riparian Buffer Zones

Chandler¹,

Preisendanz²,

Veith³

et al. 2021

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HighlightsLand management and hydrologic connectivity cause concentrated flow pathways (CFPs) to serve various functions.Pesticide concentrations diminished along flow pathways from row-cropped fields through functional riparian zones.CFPs facilitated pesticide transport into pasture/hay fields from upgradient corn fields.Subsurface transport was likely a more important transport pathway relative to surface runoff for imidacloprid.Abstract. Riparian buffers, which are an important component of watershed management strategies, can effectively mitigate nutrients and pesticides in agricultural runoff. However, concentrated flow pathways (CFPs) can undermine the performance of buffers by allowing contaminant-laden runoff to bypass the mitigation potential offered by the buffer soils and vegetation. To determine the extent to which CFPs increase pesticide transport from agricultural fields to nearby streams, soil samples (0-2 cm depth) were collected along both CFPs and overland flow (OLF) pathways from the field to the stream for nine fields in a Long-Term Agroecosystem Research (LTAR) site in the ridge and valley physiographic region of Pennsylvania. Soil samples were analyzed for atrazine, metolachlor, and imidacloprid, with two dominant patterns emerging. In corn fields, pesticide concentrations were higher in OLF than CFP samples, suggesting that pesticides were mitigated during transport through each corn field. In contrast, hay and pasture fields, which had not been treated with any of the three pesticides of interest, had lower pesticide concentrations in the OLF samples than the CFP samples. Because the CFPs from these fields originated in upgradient unsampled corn fields, these results suggest that the CFPs were a conduit for pesticides applied in the corn fields and were simply flowing through the hay and pasture fields. Similarly, CFPs in riparian buffers and grass pathways located between the row-cropped fields and the stream tended to have lower concentrations than the upland field (OLF-F) but higher concentrations than the buffer OLF, suggesting a potential for increasing overland flow effectiveness in riparian zones by interrupting CFPs leading to the stream. This study highlights the importance of the land management factors and hydrologic connectivity that cause CFPs to serve different functions (mitigation or enhancement) as runoff is conveyed from agricultural fields to a riparian buffer, and ultimately to an adjacent stream. Further, the results highlight the need for design and maintenance solutions addressing the erosion and sediment control issues that commonly undermine agricultural buffer effectiveness. Keywords: Buffers, Concentrated flow, Contaminant fate and transport, Hydrology, Land management, Pesticides, Overland flow, Water quality.

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“…Beringer et al (2021) determined partition coefficients (K d and K OC ) for clothianidin in wetland soils to determine how oxidation-reduction conditions and organic carbon content of the soils affected clothianidin sorption. Frame et al (2021) found subsurface flow pathways to be significantly more important to the overall transport of neonicotinoids leaving agricultural fields due to the pesticide being introduced into the agroecosystem below the soil surface as a seed coating, rather than applied at the surface.…”

Section: Novel Pesticidesmentioning

confidence: 99%

The emergence, trajectory, and impacts of emerging contaminants publications in the Journal of Environmental Quality

et al. 2021

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As analytical capabilities in the early 2000s began to enable the detection of chemicals in environmental media at increasingly small concentrations, chemicals with the potential to cause adverse human and ecosystem health effects began to be found nearly ubiquitously worldwide. The types of chemicals that were targeted for analysis included natural and synthetic hormones, human and veterinary pharmaceuticals, chemicals in personal care products, novel pesticides, nanoparticles, microplastics, and other chemicals of natural and synthetic origin. The impacts of these chemicals on environmental and human health in many cases remain unknown. Collectively, these chemicals became known as "emerging contaminants" or "contaminants of emerging concern." Much progress has been made toward understanding the sources of these contaminants in the environment, the processes that control their fate and transport once they are released into the environment, and the ability of technology and/or best management practices to mitigate their occurrence. As the Journal of Environmental Quality (JEQ) celebrates its 50th anniversary, we sought to understand how publications in the journal have made impactful contributions in the research area of emerging contaminants. Here, we present the trajectory of publications in JEQ that have shaped knowledge in this field, highlight the importance of these contributions, and conclude with opportunities for JEQ to continue attracting high-quality emerging contaminants research.

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Assessing surface and subsurface transport of neonicotinoid insecticides from no‐till crop fields

Cited by 14 publications

References 45 publications

Soil organic matter can delay—but not eliminate—leaching of neonicotinoid insecticides

Soil organic matter can delay—but not eliminate—leaching of neonicotinoid insecticides

Role of Concentrated Flow Pathways on the Movement of Pesticides through Agricultural Fields and Riparian Buffer Zones

The emergence, trajectory, and impacts of emerging contaminants publications in the Journal of Environmental Quality

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