Research Topics
| Ralf SchulzSummaryAffiliation: Syngenta Central Toxicology Laboratory Country: UK Publications
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Detail Information
Publications
Inhibition of rainbow trout acetylcholinesterase by aqueous and suspended particle-associated organophosphorous insecticidesArmin Sturm
Institute of Aquaculture, University of Stirling, Stirling FK9 4LA, UK
Chemosphere 68:605-12. 2007..14microgl(-1)) were minor compared to concentrations having effects in the laboratory (see above). Additionally, muscle AChE activity was significantly higher in caged trout from LR1 than in animals maintained in laboratory tanks...- Acute toxicity of methyl-parathion in wetland mesocosms: assessing the influence of aquatic plants using laboratory testing with Hyalella aztecaR Schulz
USDA Agricultural Research Service, National Sedimentation Laboratory, P O Box 1157, Oxford, Mississippi 38655, USA
Arch Environ Contam Toxicol 45:331-6. 2003..azteca mortality to < or = 5%. These results suggest that vegetation contributes to reduced MeP effects in constructed wetlands... - Methyl parathion toxicity in vegetated and nonvegetated wetland mesocosmsRalf Schulz
U S Department of Agriculture Agricultural Research Service, National Sedimentation Laboratory, PO Box 1157, Oxford, Mississippi 38655, USA
Environ Toxicol Chem 22:1262-8. 2003..The in situ bioassay employing C. tentans confirmed the positive effect of wetland vegetation on MeP toxicity. These results demonstrate the importance of vegetation for pesticide mitigation in constructed wetlands... - Fate and effects of azinphos-methyl in a flow through wetland in South AfricaRalf Schulz
Department of Zoology, Private Bag X1, University of Stellenbosch, Matieland 7602, South Africa
Environ Sci Technol 37:2139-44. 2003..The study highlights the potential of constructed wetlands as a risk-mitigation strategy for spray drift-related pesticide pollution... - Using a freshwater amphipod in situ bioassay as a sensitive tool to detect pesticide effects in the fieldRalf Schulz
Department of Zoology, University of Stellenbosch, Private Bag XI, Matieland 7602, South Africa
Environ Toxicol Chem 22:1172-6. 2003.... - Vegetated agricultural drainage ditches for the mitigation of pyrethroid-associated runoffErin R Bennett
US Department of Agriculture, Agricultural Research Service National Sedimentation Laboratory, Oxford, Mississippi 38655, USA
Environ Toxicol Chem 24:2121-7. 2005..Overall results of this study illustrate that aquatic macrophytes play an important role in the retention and distribution of pyrethroids in vegetated agricultural drainage ditches... 
Seasonal changes of macroinvertebrate communities in a Western cape river, South Africa, receiving nonpoint-source insecticide pollutionSilke Bollmohr
Department of Zoology, University of Stellenbosch, Matieland 7602, South Africa
Environ Toxicol Chem 28:809-17. 2009....- Runoff simulation with particle-associated azinphosmethyl in multispecies stream microcosms: implications for the fieldGeraldine Thiere
Department of Zoology, University of Stellenbosch, Matieland 7602, South Africa
Environ Toxicol Chem 23:1984-90. 2004.... - Runoff-related agricultural impact in relation to macroinvertebrate communities of the Lourens River, South AfricaGeraldine Thiere
Department of Zoology, University of Stellenbosch, South Africa
Water Res 38:3092-102. 2004..9). It is concluded that the Lourens River macroinvertebrate communities are affected by agricultural pollution, with pesticides and increased turbidity as the most important stressors... - Predicted and measured levels of azinphosmethyl in the Lourens River, South Africa: comparison of runoff and spray driftJames M Dabrowski
Freshwater Research Unit, Department of Zoology, University of Cape Town, Rondebosch 7701, South Africa
Environ Toxicol Chem 22:494-500. 2003.... - Combined effects of discharge, turbidity, and pesticides on mayfly behavior: experimental evaluation of spray-drift and runoff scenariosJames M Dabrowski
Freshwater Research Unit, Department of Zoology, University of Cape Town, Rondebosch 7701, South Africa
Environ Toxicol Chem 24:1395-402. 2005..Results indicate that mayflies reacted actively in response to flow conditions and passively in response to pesticide exposure... - A combined microcosm and field approach to evaluate the aquatic toxicity of azinphosmethyl to stream communitiesRalf Schulz
Department of Zoology, University of Stellenbosch, Matieland, South Africa
Environ Toxicol Chem 21:2172-8. 2002..We conclude that microcosm studies employing a field-relevant design could be linked successfully to field studies and our results suggest that transient pesticide contamination affects the aquatic communities of the Lourens River... - Predicting runoff-induced pesticide input in agricultural sub-catchment surface waters: linking catchment variables and contaminationJames M Dabrowski
Department of Zoology, University of Stellenbosch, Matieland, South Africa
Water Res 36:4975-84. 2002..We conclude that this approach to predict runoff-related surface water contamination may serve as a powerful tool for risk assessment and management in South African orchard areas... - Ecdysteroid synthesis and imaginal disc development in the midge Chironomus riparius as biomarkers for endocrine effects of tributyltinTorsten Hahn
Zoological Institute, Technical University of Braunschweig, Germany
Environ Toxicol Chem 21:1052-7. 2002..riparius at levels 2,000-fold below the LC50 value. High sensitivity and short test duration suggest that chironomids may have potential as freshwater sentinel organisms for endocrine-disrupting chemicals... - Scenario-based simulation of runoff-related pesticide entries into small streams on a landscape levelMichael Probst
Institute for Environmental Sciences, University Koblenz Landau, Fortstrasse 7, D 76829 Landau, Germany
Ecotoxicol Environ Saf 62:145-59. 2005..All input data was taken from public sources of German authorities. With little effort the tool should be applicable for other areas with similar data quality... - A comparison of predicted and measured levels of runoff-related pesticide concentrations in small lowland streams on a landscape levelNorbert Berenzen
Group Limnology/Ecotoxicology, Zoological Institute of the Technical University Braunschweig, Fasanenstr. 3, 38092 Braunschweig, Germany
Chemosphere 58:683-91. 2005..71; p<or=0.01; tebuconazole: r2=0.77; p<or=0.01. The present model successfully explains the pesticide concentrations associated with single entry events caused by runoff, especially at concentration levels above (>or=0.5 microg/l)... - Linking land use variables and invertebrate taxon richness in small and medium-sized agricultural streams on a landscape levelMichael Probst
Department of Limnology and Ecotoxicology, Zoological Institute of the Technical University Braunschweig, Fasanenstr 3, Braunschweig 38092, Germany
Ecotoxicol Environ Saf 60:140-6. 2005..Therefore the factor "risk of runoff" is considered to express a significant proportion of the variability in macroinvertebrate communities caused by stressors of agricultural origin... - Macroinvertebrate community structure in agricultural streams: impact of runoff-related pesticide contaminationNorbert Berenzen
Zoological Institute of the Technical University Braunschweig, Limnology Ecotoxicology, Fasanenstr 3, 38092 Braunschweig, Germany
Ecotoxicol Environ Saf 60:37-46. 2005..01 x acute toxicity to Daphnia and are thus in agreement with the assumptions underlying the standards set by the European Union uniform principle... - Field studies on exposure, effects, and risk mitigation of aquatic nonpoint-source insecticide pollution: a reviewRalf Schulz
Zoological Institute, Technical University, Fasanenstrasse 3, D 38092 Braunschweig, Germany
J Environ Qual 33:419-48. 2004..Although only 11 studies are available, the results in terms of pesticide retention and toxicity reduction are very promising. Based on the reviewed literature, recommendations are made for future research activities... - A qualitative sampling method for monitoring water quality in temporary channels or point sources and its application to pesticide contaminationMichael Neumann
Department of Limnology, Zoological Institute, Technical University Braunschweig, Fasanenstrasse 3, D 38092 Braunschweig, Germany
Chemosphere 51:509-13. 2003..We found parathion-ethyl concentrations of 0.3 microg l(-1), diuron up to 17.3 microg l(-1), ethofumesate up to 51.1 microg l(-1), metamitron up to 92 microg l(-1) and prosulfocarb up to 130 microg l(-1)... - The significance of entry routes as point and non-point sources of pesticides in small streamsMichael Neumann
Department of Limnology, Zoological Institute, Technical University Braunschweig, Germany
Water Res 36:835-42. 2002..In comparison, stream B had only farmyard runoff and non-point sources, which caused high peaks of herbicide and a contamination by insecticides. Consequently, high-water phases generated 70% of the total pesticide load... - Test-plot studies on runoff of sulfonamides from manured soils after sprinkler irrigationRobert Kreuzig
Institute of Ecological Chemistry and Waste Analysis, Technical University of Braunschweig, D 38106 Braunschweig, Germany
Environ Toxicol Chem 24:777-81. 2005..Discharge volumes and sulfonamide emissions were 36 to 128 L and 0.1 to 2.5%, respectively. Despite the high-intensity sprinkler irrigation, major emissions did not occur until a 60-min delay... - Environmental chemicals with known endocrine potential affect yolk protein content in the aquatic insect Chironomus ripariusTorsten Hahn
Zoologisches Institut der TU Braunschweig, AG Limnologie Okotoxikologie, Germany
Environ Pollut 120:525-8. 2002..Female yolk protein contents were affected only in the 3,000 microg bisphenol a/l contaminated group, where yolk immunoreactivity was reduced by ca. 10% compared to the control... - In situ-based effects measures: determining the ecological relevance of measured responsesDonald J Baird
National Water Research Institute Environment Canada at Canadian Rivers Institute, Department of Biology, University of New Brunswick, PO Box 45111, Fredericton, New Brunswick E3B 6E1, Canada
Integr Environ Assess Manag 3:259-67. 2007..The use of models as both interpretive and predictive tools is discussed, with suggestions of appropriate methods for different protection goals...