Fate of the new sulfonylurea amidosulfuron in soil

Fent, G.; Kubiak, Roland; Eichhorn, K. W.

doi:10.1016/0048-9697(93)90132-p

Cited by 8 publications

(12 citation statements)

References 7 publications

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“…(1993). The assumption of Fent et al . (1993) that amidosulfuron is transformed at similar rates to thifensulfuron‐methyl and tribenuron‐methyl, and therefore is part of a new generation of sulfonylureas, cannot be confirmed in this study.…”

Section: Resultssupporting

confidence: 86%

“…Residues of amidosulfuron in the different soil layers were determined at a maximum level of 1.8 μg kg −1 . In general, these concentrations should not cause any problems for following crops, in accordance with the results of Fent et al . (1993), who detected residues of 2.3 μg kg −1 3 months after application, which did not damage rape ( Brussica napus L.) – a common and sensitive following crop.…”

Section: Resultssupporting

confidence: 72%

“…4 showed that there was an initial rapid decrease in the concentration of the herbicide. This two-phase degradation of herbicides in soil has been reported previously for several compounds, including sulfonylureas (Duy et al, 1987;Fent et al, 1993). The phenomenon is described by Duy et al (1987) as a two-compartment model, where the herbicides are ®rst diluted in soil water and available for chemical and microbial degradation.…”

Section: In¯uence Of a Combined Application Of Herbicides On Their Desupporting

confidence: 66%

“…4 showed that there was an initial rapid decrease in the concentration of the herbicide. This two‐phase degradation of herbicides in soil has been reported previously for several compounds, including sulfonylureas (Duffy et al ., 1987; Fent et al ., 1993). The phenomenon is described by Duffy et al .…”

Section: Resultsmentioning

confidence: 99%

“…The amount of protons at the surface of soil particles is higher than in soil water (Nicholls, 1988), therefore, adsorbed compounds are not entirely protected from chemical hydrolysis. This agrees with the results obtained with amidosulfuron in this study and has already been demonstrated by Fent et al . (1993).…”

Section: Resultsmentioning

confidence: 99%

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Influence of straw management, nitrogen fertilization and dosage rates on the dissipation of five sulfonylureas in soil

Menne¹,

Berger²

2001

Weed Research

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The dissipation behaviour of metsulfuron‐methyl, tribenuron‐methyl, thifensulfuron‐methyl, triasulfuron and amidosulfuron were studied in soil following post‐emergence spring applications to cereal crops. Incorporation or removal of straw and different fertilizer applications had no influence on the disappearance time (DT50) of the herbicides. However, in laboratory trials dissipation of metsulfuron‐methyl, triasulfuron and amidosulfuron at higher application rates was accelerated after incorporation of straw into the soil. The addition of straw decreases soil pH thereby causing faster hydrolysis of the compounds. Addition of nitrogen fertilizer increased the half‐lives (t1/2) of the herbicides. Combination of both straw and N fertilizer, however, had no effect. Neither straw nor N influenced the degradation of tribenuron‐methyl and thifensulfuron‐methyl. The DT50 of all herbicides investigated varied from 6 to 17 days in the field trials. Except for amidosulfuron, herbicides could not be detected 38–68 days after application. In the laboratory, t1/2 values were higher than those in the field at 75 days (amidosulfuron), 63 days (metsulfuron‐methyl), 35 days (triasulfuron) and 13 days (tribenuron‐methyl). Only the t1/2 of thifensulfuron‐methyl was at 29 h faster under laboratory conditions. T1/2 values of all herbicides were influenced by their initial concentration. The t1/2 values of amidosulfuron and tribenuron‐methyl at 1 mg a.i. kg−1 soil were 2–2.5 times higher than at the recommended field application rate of 42 μg a.i. kg−1 soil.

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Section: Resultssupporting

confidence: 86%

Section: Resultssupporting

confidence: 72%

Section: In¯uence Of a Combined Application Of Herbicides On Their Desupporting

confidence: 66%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Influence of straw management, nitrogen fertilization and dosage rates on the dissipation of five sulfonylureas in soil

Menne¹,

Berger²

2001

Weed Research

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Groundwater quality

Mayer¹,

Imhoff²,

Mitchell³

et al. 1994

Water Environment Research

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Soil Column Leaching of Pesticides

Katagi

2012

Reviews of Environmental Contamination and Toxicology Volume 221

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In this review, I address the practical and theoretical aspects of pesticide soil mobility.I also address the methods used to measure mobility, and the factors that influence it, and I summarize the data that have been published on the column leaching of pesticides.Pesticides that enter the unsaturated soil profile are transported downwards by the water flux, and are adsorbed, desorbed, and/or degraded as they pass through the soil. The rate of passage of a pesticide through the soil depends on the properties of the pesticide, the properties of the soil and the prevailing environmental conditions.Because large amounts of many different pesticides are used around the world, they and their degradates may sometimes contaminate groundwater at unacceptable levels.It is for this reason that assessing the transport behavior and soil mobility of pesticides before they are sold into commerce is important and is one indispensable element that regulators use to assess probable pesticide safety. Both elementary soil column leaching and sophisticated outdoor lysimeter studies are performed to measure the leaching potential for pesticides; the latter approach more reliably reflects probable field behavior, but the former is useful to initially profile a pesticide for soil mobility potential.Soil is physically heterogeneous. The structure of soil varies both vertically and laterally, and this variability affects the complex flow of water through the soil profile, making it difficult to predict with accuracy. In addition, macropores exist in soils and further add to the complexity of how water flow occurs. The degree to which soil is tilled, the density of vegetation on the surface, and the type and amounts of organic soil amendments that are added to soil further affect the movement rate of water through soil, the character of soil adsorption sites and the microbial populations that exist in the soil. Parameters that most influence the rate of pesticide mobility in soil are persistence (DT50) of the pesticide, and its sorption/desorption(Koc) characteristics. These parameters may vary for the same pesticide from geographic site-to-site and with soil depth. The interactions that normally occur between pesticides and dissolved organic matter (DOM) or WDC are yet other factors that may complicate pesticide leaching behavior.The soil mobility of pesticides is normally tested both in the laboratory and in the field. Lab studies are initially performed to give researchers a preliminary appraisal of the relative mobility of a pesticide. Later, field lysimeter studies can be performed to provide more natural leaching conditions that emulate the actual field use pattern. Lysimeter studies give the most reliable information on the leaching behavior of a pesticide under field conditions, but these studies are time-consuming and expensive and cannot be performed everywhere. It is for this reason that the laboratory soil column leaching approach is commonly utilized to profile the mobility of a pesticide,and appraise how it behaves in diffe...

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Fate of the new sulfonylurea amidosulfuron in soil

Cited by 8 publications

References 7 publications

Influence of straw management, nitrogen fertilization and dosage rates on the dissipation of five sulfonylureas in soil

Influence of straw management, nitrogen fertilization and dosage rates on the dissipation of five sulfonylureas in soil

Groundwater quality

Soil Column Leaching of Pesticides

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