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Thomas D. Bucheli - One of the best experts on this subject based on the ideXlab platform.

  • leaching of the neonicotinoids thiamethoxam and imidacloprid from sugar beet Seed Dressings to subsurface tile drains
    Journal of Agricultural and Food Chemistry, 2016
    Co-Authors: Felix E Wettstein, Roy Kasteel, Maria Garcia F. Delgado, Irene Hanke, Sebastian Huntscha, Marianne E. Balmer, Thomas Poiger, Thomas D. Bucheli
    Abstract:

    Pesticide transport from Seed Dressings toward subsurface tile drains is still poorly understood. We monitored the neonicotinoid insecticides imidacloprid and thiamethoxam from sugar beet Seed Dressings in flow-proportional drainage water samples, together with spray applications of bromide and the herbicide S-metolachlor in spring and the fungicides epoxiconazole and kresoxim-methyl in summer. Event-driven, high first concentration maxima up to 2830 and 1290 ng/L for thiamethoxam and imidacloprid, respectively, were followed by an extended period of tailing and suggested preferential flow. Nevertheless, mass recoveries declined in agreement with the degradation and sorption properties collated in the groundwater ubiquity score, following the order bromide (4.9%), thiamethoxam (1.2%), imidacloprid (0.48%), kresoxim-methyl acid (0.17%), S-metolachlor (0.032%), epoxiconazole (0.013%), and kresoxim-methyl (0.003%), and indicated increased leaching from Seed Dressings compared to spray applications. Measured ...

  • Leaching of the Neonicotinoids Thiamethoxam and Imidacloprid from Sugar Beet Seed Dressings to Subsurface Tile Drains
    2016
    Co-Authors: Felix E. Wettstein, Roy Kasteel, Maria Garcia F. Delgado, Irene Hanke, Sebastian Huntscha, Marianne E. Balmer, Thomas Poiger, Thomas D. Bucheli
    Abstract:

    Pesticide transport from Seed Dressings toward subsurface tile drains is still poorly understood. We monitored the neonicotinoid insecticides imidacloprid and thiamethoxam from sugar beet Seed Dressings in flow-proportional drainage water samples, together with spray applications of bromide and the herbicide S-metolachlor in spring and the fungicides epoxiconazole and kresoxim-methyl in summer. Event-driven, high first concentration maxima up to 2830 and 1290 ng/L for thiamethoxam and imidacloprid, respectively, were followed by an extended period of tailing and suggested preferential flow. Nevertheless, mass recoveries declined in agreement with the degradation and sorption properties collated in the groundwater ubiquity score, following the order bromide (4.9%), thiamethoxam (1.2%), imidacloprid (0.48%), kresoxim-methyl acid (0.17%), S-metolachlor (0.032%), epoxiconazole (0.013%), and kresoxim-methyl (0.003%), and indicated increased leaching from Seed Dressings compared to spray applications. Measured concentrations and mass recoveries indicate that subsurface tile drains contribute to surface water contamination with neonicotinoids from Seed Dressings

Ian Newton - One of the best experts on this subject based on the ideXlab platform.

  • Effects of Cyclodiene Insecticides on the Sparrowhawk (Accipiter Nisus) in Britain – a Reappraisal of the Evidence
    Ecotoxicology, 1998
    Co-Authors: C. H. Walker, Ian Newton
    Abstract:

    Cyclodiene insecticides were introduced in Britain in the mid-1950s, after which there was a rapid decline of sparrowhawk populations in agricultural areas associated with the lethal toxicity of these compounds. Subsequently the recovery of sparrowhawk populations was studied in different areas of Britain following the ban on dieldrin Seed Dressings in 1975. Frequency distribution diagrams of dieldrin residues in sparrowhawk livers were constructed for different geographical areas over specified periods. During 1963–1975, biphasic distributions were found, with some 50% of the entire sample contained within a second peak of geometric mean 20 p.p.m. in an eastern area where cylodiene exposure was greatest and populations were most depressed. A similar second peak was found in a sample from another area where the cyclodiene exposure was less, although it only represented 5% of the individuals found dead. These individuals with high dieldrin levels had evidently received lethal doses of insecticide. In a sample from the eastern area taken during 1976–1982, the peak at 20 p.p.m. had virtually disappeared, to be replaced by another peak centred on 4.8 p.p.m. This latter peak may have represented individuals dying as a consequence of sublethal neurotoxic effects. The distribution diagrams for 1983–1986 showed single peaks of dieldrin centring on 0.55–0.75 p.p.m., with no clear evidence of other peaks which might represent poisoned individuals. By this time, the populations in both areas had either fully recovered or were rapidly recovering.

  • effects of cyclodiene insecticides on the sparrowhawk accipiter nisus in britain a reappraisal of the evidence
    Ecotoxicology, 1998
    Co-Authors: C. H. Walker, Ian Newton
    Abstract:

    Cyclodiene insecticides were introduced in Britain in the mid-1950s, after which there was a rapid decline of sparrowhawk populations in agricultural areas associated with the lethal toxicity of these compounds. Subsequently the recovery of sparrowhawk populations was studied in different areas of Britain following the ban on dieldrin Seed Dressings in 1975. Frequency distribution diagrams of dieldrin residues in sparrowhawk livers were constructed for different geographical areas over specified periods. During 1963–1975, biphasic distributions were found, with some 50% of the entire sample contained within a second peak of geometric mean 20 p.p.m. in an eastern area where cylodiene exposure was greatest and populations were most depressed. A similar second peak was found in a sample from another area where the cyclodiene exposure was less, although it only represented 5% of the individuals found dead. These individuals with high dieldrin levels had evidently received lethal doses of insecticide. In a sample from the eastern area taken during 1976–1982, the peak at 20 p.p.m. had virtually disappeared, to be replaced by another peak centred on 4.8 p.p.m. This latter peak may have represented individuals dying as a consequence of sublethal neurotoxic effects. The distribution diagrams for 1983–1986 showed single peaks of dieldrin centring on 0.55–0.75 p.p.m., with no clear evidence of other peaks which might represent poisoned individuals. By this time, the populations in both areas had either fully recovered or were rapidly recovering.

Felix E Wettstein - One of the best experts on this subject based on the ideXlab platform.

  • leaching of the neonicotinoids thiamethoxam and imidacloprid from sugar beet Seed Dressings to subsurface tile drains
    Journal of Agricultural and Food Chemistry, 2016
    Co-Authors: Felix E Wettstein, Roy Kasteel, Maria Garcia F. Delgado, Irene Hanke, Sebastian Huntscha, Marianne E. Balmer, Thomas Poiger, Thomas D. Bucheli
    Abstract:

    Pesticide transport from Seed Dressings toward subsurface tile drains is still poorly understood. We monitored the neonicotinoid insecticides imidacloprid and thiamethoxam from sugar beet Seed Dressings in flow-proportional drainage water samples, together with spray applications of bromide and the herbicide S-metolachlor in spring and the fungicides epoxiconazole and kresoxim-methyl in summer. Event-driven, high first concentration maxima up to 2830 and 1290 ng/L for thiamethoxam and imidacloprid, respectively, were followed by an extended period of tailing and suggested preferential flow. Nevertheless, mass recoveries declined in agreement with the degradation and sorption properties collated in the groundwater ubiquity score, following the order bromide (4.9%), thiamethoxam (1.2%), imidacloprid (0.48%), kresoxim-methyl acid (0.17%), S-metolachlor (0.032%), epoxiconazole (0.013%), and kresoxim-methyl (0.003%), and indicated increased leaching from Seed Dressings compared to spray applications. Measured ...

Roy Kasteel - One of the best experts on this subject based on the ideXlab platform.

  • leaching of the neonicotinoids thiamethoxam and imidacloprid from sugar beet Seed Dressings to subsurface tile drains
    Journal of Agricultural and Food Chemistry, 2016
    Co-Authors: Felix E Wettstein, Roy Kasteel, Maria Garcia F. Delgado, Irene Hanke, Sebastian Huntscha, Marianne E. Balmer, Thomas Poiger, Thomas D. Bucheli
    Abstract:

    Pesticide transport from Seed Dressings toward subsurface tile drains is still poorly understood. We monitored the neonicotinoid insecticides imidacloprid and thiamethoxam from sugar beet Seed Dressings in flow-proportional drainage water samples, together with spray applications of bromide and the herbicide S-metolachlor in spring and the fungicides epoxiconazole and kresoxim-methyl in summer. Event-driven, high first concentration maxima up to 2830 and 1290 ng/L for thiamethoxam and imidacloprid, respectively, were followed by an extended period of tailing and suggested preferential flow. Nevertheless, mass recoveries declined in agreement with the degradation and sorption properties collated in the groundwater ubiquity score, following the order bromide (4.9%), thiamethoxam (1.2%), imidacloprid (0.48%), kresoxim-methyl acid (0.17%), S-metolachlor (0.032%), epoxiconazole (0.013%), and kresoxim-methyl (0.003%), and indicated increased leaching from Seed Dressings compared to spray applications. Measured ...

  • Leaching of the Neonicotinoids Thiamethoxam and Imidacloprid from Sugar Beet Seed Dressings to Subsurface Tile Drains
    2016
    Co-Authors: Felix E. Wettstein, Roy Kasteel, Maria Garcia F. Delgado, Irene Hanke, Sebastian Huntscha, Marianne E. Balmer, Thomas Poiger, Thomas D. Bucheli
    Abstract:

    Pesticide transport from Seed Dressings toward subsurface tile drains is still poorly understood. We monitored the neonicotinoid insecticides imidacloprid and thiamethoxam from sugar beet Seed Dressings in flow-proportional drainage water samples, together with spray applications of bromide and the herbicide S-metolachlor in spring and the fungicides epoxiconazole and kresoxim-methyl in summer. Event-driven, high first concentration maxima up to 2830 and 1290 ng/L for thiamethoxam and imidacloprid, respectively, were followed by an extended period of tailing and suggested preferential flow. Nevertheless, mass recoveries declined in agreement with the degradation and sorption properties collated in the groundwater ubiquity score, following the order bromide (4.9%), thiamethoxam (1.2%), imidacloprid (0.48%), kresoxim-methyl acid (0.17%), S-metolachlor (0.032%), epoxiconazole (0.013%), and kresoxim-methyl (0.003%), and indicated increased leaching from Seed Dressings compared to spray applications. Measured concentrations and mass recoveries indicate that subsurface tile drains contribute to surface water contamination with neonicotinoids from Seed Dressings

Maria Garcia F. Delgado - One of the best experts on this subject based on the ideXlab platform.

  • leaching of the neonicotinoids thiamethoxam and imidacloprid from sugar beet Seed Dressings to subsurface tile drains
    Journal of Agricultural and Food Chemistry, 2016
    Co-Authors: Felix E Wettstein, Roy Kasteel, Maria Garcia F. Delgado, Irene Hanke, Sebastian Huntscha, Marianne E. Balmer, Thomas Poiger, Thomas D. Bucheli
    Abstract:

    Pesticide transport from Seed Dressings toward subsurface tile drains is still poorly understood. We monitored the neonicotinoid insecticides imidacloprid and thiamethoxam from sugar beet Seed Dressings in flow-proportional drainage water samples, together with spray applications of bromide and the herbicide S-metolachlor in spring and the fungicides epoxiconazole and kresoxim-methyl in summer. Event-driven, high first concentration maxima up to 2830 and 1290 ng/L for thiamethoxam and imidacloprid, respectively, were followed by an extended period of tailing and suggested preferential flow. Nevertheless, mass recoveries declined in agreement with the degradation and sorption properties collated in the groundwater ubiquity score, following the order bromide (4.9%), thiamethoxam (1.2%), imidacloprid (0.48%), kresoxim-methyl acid (0.17%), S-metolachlor (0.032%), epoxiconazole (0.013%), and kresoxim-methyl (0.003%), and indicated increased leaching from Seed Dressings compared to spray applications. Measured ...

  • Leaching of the Neonicotinoids Thiamethoxam and Imidacloprid from Sugar Beet Seed Dressings to Subsurface Tile Drains
    2016
    Co-Authors: Felix E. Wettstein, Roy Kasteel, Maria Garcia F. Delgado, Irene Hanke, Sebastian Huntscha, Marianne E. Balmer, Thomas Poiger, Thomas D. Bucheli
    Abstract:

    Pesticide transport from Seed Dressings toward subsurface tile drains is still poorly understood. We monitored the neonicotinoid insecticides imidacloprid and thiamethoxam from sugar beet Seed Dressings in flow-proportional drainage water samples, together with spray applications of bromide and the herbicide S-metolachlor in spring and the fungicides epoxiconazole and kresoxim-methyl in summer. Event-driven, high first concentration maxima up to 2830 and 1290 ng/L for thiamethoxam and imidacloprid, respectively, were followed by an extended period of tailing and suggested preferential flow. Nevertheless, mass recoveries declined in agreement with the degradation and sorption properties collated in the groundwater ubiquity score, following the order bromide (4.9%), thiamethoxam (1.2%), imidacloprid (0.48%), kresoxim-methyl acid (0.17%), S-metolachlor (0.032%), epoxiconazole (0.013%), and kresoxim-methyl (0.003%), and indicated increased leaching from Seed Dressings compared to spray applications. Measured concentrations and mass recoveries indicate that subsurface tile drains contribute to surface water contamination with neonicotinoids from Seed Dressings