Dissipation of four forest-use herbicides at high latitudes

Newton, Michael; Cole, Elizabeth; Tinsley, Ian J.

doi:10.1007/s11356-008-0039-7

Cited by 28 publications

(22 citation statements)

References 34 publications

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“…The most commonly used extractants for soil have been aqueous bases (0.1–1.0 M KOH or NaOH; 0.25 M NH 4 0H/0.01 M KHPO 4 ; 1.0–2.0 M of NH 4 OH) water (Table ) . Other extractants include: 10% phosphoric acid, 0.1M KH 2 PO 4 , and sodium borate buffers .…”

Section: Analysis Methodsmentioning

confidence: 99%

Analysis of glyphosate and aminomethylphosphonic acid in water, plant materials and soil

2015

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There is a need for simple, fast, efficient and sensitive methods of analysis for glyphosate and its degradate aminomethylphosphonic acid (AMPA) in diverse matrices such as water, plant materials and soil to facilitate environmental research needed to address the continuing concerns related to increasing glyphosate use. A variety of water-based solutions have been used to extract the chemicals from different matrices. Many methods require extensive sample preparation, including derivatization and clean-up, prior to analysis by a variety of detection techniques. This review summarizes methods used during the past 15 years for analysis of glyphosate and AMPA in water, plant materials and soil. The simplest methods use aqueous extraction of glyphosate and AMPA from plant materials and soil, no derivatization, solid-phase extraction (SPE) columns for clean-up, guard columns for separation and confirmation of the analytes by mass spectrometry and quantitation using isotope-labeled internal standards. They have levels of detection (LODs) below the regulatory limits in North America. These methods are discussed in more detail in the review.

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Section: Analysis Methodsmentioning

confidence: 99%

Analysis of glyphosate and aminomethylphosphonic acid in water, plant materials and soil

2015

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“…In China, glyphosate is applied to bare soil before and after sowing every year (Yang et al, 2014;Zhang et al, 2011), which underlies a high risk of transport by processes associated with erosion (Al-Rajab and Schiavon, 2010;Laitinen et al, 2009;Styczen et al, 2011;Todorovic et al, 2014). Furthermore, few studies have examined the decay or transport of glyphosate under field or erosive conditions in Chinese loess soil, especially in semi-humid climatic regions (Newton et al, 2008). Identifying the characteristics of decay with/without erosive rainfall, including the dynamics of soil moisture, is particularly important.…”

Section: Introductionmentioning

confidence: 99%

Decay characteristics and erosion-related transport of glyphosate in Chinese loess soil under field conditions

Yang

Wang

Bento

et al. 2015

Science of The Total Environment

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“…Imazapyr is known to have longer residence time in soils than triclopyr with detectable residues observed at 454 and 730 d after application in Alaska and Sweden, respectively (Torstenssen and Stark, 1982; Newton et al, 2008). Imazapyr dissipation in the Yukon Territory had a DT 50 of 16 DAT, which is faster than some previous studies that reported DT 50 values ranging from 37 to 144 DAT (Börjesson et al, 2004; Wang et al, 2005; Newton et al, 2008; Gianelli et al, 2014; Douglass et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

“…Herbicide dissipation from vegetation and soil are dependent on environmental conditions and soil properties. On the surface, the active ingredient can dissipate through volatilization, photolysis or microbial breakdown (Bentson and Norris, 1991; Newton et al, 2008). Long summer photoperiods at higher latitudes may increase the photolysis rate on the leaf prior to herbicide absorption; however, microbial breakdown may be slowed by cooler temperatures.…”

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confidence: 99%

Linking Herbicide Dissipation to Soil Ecological Risk along Transmission Rights‐of‐Way in the Yukon Territory, Canada

Jimmo

Isbister²,

Lamb³

et al. 2018

J of Env Quality

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In the Yukon Territory, transmission rights‐of‐way (ROWs) are managed using brushing and mowing techniques alone. When cut, target species such as Populus tremuloides Michx. and Salix spp. grow rapidly shortening maintenance cycles. Long‐term vegetation control may be improved by integrating herbicide application. However, prior to implementation, the dissipation and toxicity of herbicides in northern latitudes needed to be assessed. The dissipation of Garlon XRT (triclopyr) and Arsenal Powerline (imazapyr) in soils was assessed at five ROW locations representative of the main ecoregion types where ROWs occur within the Yukon Territory. Soils from four sites were collected at 1, 30, and 365 d after treatment to determine persistence of herbicides for each of three application methods (backpack spraying, cut stump, and point injection). Increased sampling intervals were added to better determine the dissipation rate of each herbicide in Yukon Territory soils. Soil dissipation data were linked to a series of standardized toxicity tests, including three soil invertebrates (Enchytreaus crypticus, Folsmia candida, and Oppia nitens). Additionally, the dissipation of both herbicides from the target species Salix glauca L. was assessed at one site. Herbicide residues persisted in soils for longer than 365 d after treatment and longer than 30 d after treatment in S. glauca. However, concentrations were below the concentration that would affect 25% of the invertebrate species tested. Weight of evidence and toxic exposure ratios were used to characterize the risks associated with herbicide application in northern latitudes and provided both qualitative and quantitative means to communicate the results to the public. Core Ideas Herbicide use may improve vegetation management along rights‐of‐way in the Yukon. Triclopyr is a good alternative due to a mobile‐phase DT50 of 1 d after treatment. Imazapyr presented no unacceptable risk to the soil invertebrates tested. Risk characterization indicated triclopyr and imazapyr are acceptable in northern latitudes. Triclopyr presents less risk due to fast dissipation and low risk to soil invertebrates.

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Dissipation of four forest-use herbicides at high latitudes

Cited by 28 publications

References 34 publications

Analysis of glyphosate and aminomethylphosphonic acid in water, plant materials and soil

Analysis of glyphosate and aminomethylphosphonic acid in water, plant materials and soil

Decay characteristics and erosion-related transport of glyphosate in Chinese loess soil under field conditions

Linking Herbicide Dissipation to Soil Ecological Risk along Transmission Rights‐of‐Way in the Yukon Territory, Canada

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