Agricultural Herbicide Transport in a First-Order Intermittent Stream, Nebraska, USA

Herbicides are regularly applied in horticultural production systems and may migrate off-site, potentially posing an ecological risk to surface waterways. However, few studies have investigated the levels and potential ecotoxicological impact of herbicides in horticultural catchments in southern Australia. This study investigated the presence of 10 herbicides at 18 sites during a 5-month period in horticulturally important areas of the Yarra Valley in southeastern Australia. Seven of the 10 herbicides were detected in the streams, in 39 % of spot water samples, in 25 % of surface sediment samples, and in>70 % of the passive sampler systems deployed. Few samples contained residues of ≥2 herbicides. Simazine was the herbicide most frequently detected in water, sediment, and passive sampler samples and had the highest concentrations in water (0.67 μg/L) and sediment (260 μg/kg dry weight). Generally the concentrations of the herbicides detected were several orders of magnitude lower than reported ecotoxicological effect values, including those for aquatic plants and algae, suggesting that concentrations of individual chemicals in the catchment were unlikely to pose an ecological risk. However, little is known about the combined effects of simultaneous, low-level exposure of multiple herbicides of the same mode of action on Australian aquatic organisms nor their contribution when found in mixtures with other pesticides. Further research is required to adequately assess the risk of pesticides in Victorian aquatic environments.

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Investigation of 10 Herbicides in Surface Waters of a Horticultural Production Catchment in Southeastern Australia

Allinson

Bui

Zhang

et al. 2014

Arch Environ Contam Toxicol

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Atrazine suppresses FSH-induced steroidogenesis and LH-dependent expression of ovulatory genes through PDE-cAMP signaling pathway in human cumulus granulosa cells

Pogrmić-Majkić

Samardzija

Stojkov-Mimic

et al. 2018

Molecular and Cellular Endocrinology

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Triazine herbicides inhibit relaxin signaling and disrupt nitric oxide homeostasis

Park

Lim

Choi

et al. 2016

Toxicology and Applied Pharmacology

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Agricultural Herbicide Transport in a First-Order Intermittent Stream, Nebraska, USA

Cited by 5 publications

References 36 publications

Investigation of 10 Herbicides in Surface Waters of a Horticultural Production Catchment in Southeastern Australia

Investigation of 10 Herbicides in Surface Waters of a Horticultural Production Catchment in Southeastern Australia

Atrazine suppresses FSH-induced steroidogenesis and LH-dependent expression of ovulatory genes through PDE-cAMP signaling pathway in human cumulus granulosa cells

Triazine herbicides inhibit relaxin signaling and disrupt nitric oxide homeostasis

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