Výsledky vyhledávání - "Niels Elmegaard"

Comparison of the toxicity of dimethoate and cypermethrin in the laboratory and the field when applying the same bioassay

Autor: Christian Kjær, Christian Damgaard, Gerard A. J. M. Jagers Op Akkerhuis, Niels Elmegaard

Publikováno v: Environmental Toxicology and Chemistry. 18:2379-2385

The present paper studies the relationship between laboratory- and field-based survival data of beetle larvae sprayed with either dimethoate or cypermethrin. The comparison for dimethoate was based on an earlier constructed pesticide-effect model der

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cd7f77c3246d60ca1112ef9c18d40f67
https://doi.org/10.1002/etc.5620181036

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Gen-Fluß zwischen Populationen der Blattkäfer-Arten Gastrophysa polygoni and Lochmaea suturalis in Dänemark [Coleoptera: Chrysomelidae)

Autor: Boy Overgaard Nielsen, Niels Elmegaard, Vibeke Simonsen, Christian Kjær

Publikováno v: Entomologia Generalis. 23:271-279

The genetic differentiation of populations of the leaf beetles Gastrophysa polygoni Linnaeus 1758 and Lochmaea suturalis Thomson 1866 was measured by use of allozymes in order to estimate the gene flow between geographically separated populations. 26

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::62d7df9665adea0a0f8f14ca575fa4d2
https://doi.org/10.1127/entom.gen/23/1999/271

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Skylark (Alauda arvensis) utilisation of micro-habitats in spring barley fields

Autor: Peter Odderskær, John Grynderup Poulsen, Per Nørmark Andersen, Niels Elmegaard, Allan Prang

Publikováno v: Odderskær, P, Prang, A, Poulsen, J G, Andersen, P N & Elmegaard, N 1997, ' Skylark (Alauda arvensis) Utilisation of Micro-Habitats in Spring Barley Fields ', Agriculture, Ecosystems & Environment, vol. 62, pp. 21-29 .

Within-field habitat utilisation by skylarks Alauda arvensis was studied in spring barley crops by means of radio-tracking and visual sighting. Arthropod food abundance and dropping densities were monitored within three different micro-habitats. The

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b96ccdc7bbf264fa8c4b26902c2bbb5f
https://doi.org/10.1016/s0167-8809(96)01113-9

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Effects of Copper Sulfate on Black Bindweed (Polygonum convolvulusL.)

Autor: Christian Kjær, Niels Elmegaard

Publikováno v: Ecotoxicology and Environmental Safety. 33:110-117

Seedlings of black bindweed (Polygonum convolvulus L.) were transplanted to soil contaminated with copper sulfate at different dosages. These plants were followed until maturity under greenhouse conditions, and measures of mortality, growth, and repr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08ac6ae39e3009ac44a3d1b44c043ef6
https://doi.org/10.1006/eesa.1996.0014

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Workshop Exercise

Autor: Christopher J. Topping, Richard M. Sibly, Alyce Fritz, Peter Delorme, Vibeke Moller, Wayne R. Munns, Niels Elmegaard

Publikováno v: Population-Level Ecological Risk Assessment

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b2a256c55a9dc166b90699192b5429ea
https://doi.org/10.1201/9781420053333.ax2

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Weed and arthropod populations in conventional and genetically modified herbicide tolerant fodder beet fields

Autor: Beate Strandberg, Niels Elmegaard, Marianne Bruus Pedersen

Publikováno v: Strandberg, B, Pedersen, M B & Elmegaard, N 2005, ' Weed and arthropod populations in conventional and genetically modified herbicide tolerant fodder beet fields ', Agriculture, Ecosystems & Environment, vol. 105, pp. 243-253 .
Aarhus University

The introduction of genetically modified herbicide tolerant (GMHT) crops has raised concerns from both scientists and non-governmental organisations about possible effects on arable flora and fauna due to the changes in herbicide application and mana

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0cfb987ccfddb6e3cd50943379b713d8
https://pure.au.dk/portal/da/publications/weed-and-arthropod-populations-in-conventional-and-genetically-modified-herbicide-tolerant-fodder-beet-fields(20c050f0-7e9e-11dd-a5a8-000ea68e967b).html

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Toxicity testing of fifteen non-crop plant species with six herbicides in a greenhouse experiment: implications for risk assessment

Autor: Niels Elmegaard, Céline Boutin, Christian Kjær

Publikováno v: Ecotoxicology (London, England). 13(4)

Estimation of risk to plants not targeted by herbicides when used in agricultural or forestry situations requires appropriate data on multiple species. Currently, many questions remain unresolved as to the adequate type and number of species to be te

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34fd0d3e2242b414026ff61f30c63cd8
https://pubmed.ncbi.nlm.nih.gov/15344515

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Methods for risk assessment of biological control programmes in the Sahelian region

Autor: Eva Nølke Fisker, Axelsen, J. A., Niels Elmegaard, Jorgen Eilenberg, Kooyman, C., Langewald, J., Ouambama, Z., Tonkoano, A.

Publikováno v: Fisker, E N, Axelsen, J A, Elmegaard, N, Eilenberg, J, Kooyman, C, Langewald, J, Ouambama, Z & Tonkoano, A 2004, ' Methods for risk assessment of biological control programmes in the Sahelian region ', Finland, 01/08/2004-06/08/2004, .
Fisker, E N, Axelsen, J A, Elmegaard, N, Eilenberg, J, Kooyman, C, Langewald, J, Ouambama, Z & Tonkoano, A 2005, ' Methods for risk assessment of biological control programmes in the Sahelian region ', Niamey, Niger, 26/09/2005-26/02/2014, .
University of Copenhagen
Fisker, E N, Axelsen, J A, Elmegaard, N, Eilenberg, J, Kooyman, C, Langewald, J, Ouambama, Z & Tonkoano, A 2004, ' Methods for risk assessment of biological control programmes in the Sahelian region ', Elsinore, Denmark, 15/11/2004-16/11/2004, .
Fisker, E N, Axelsen, J A, Elmegaard, N, Eilenberg, J, Kooyman, C, Langewald, J, Ouambama, Z & Tonkoano, A 2004, ' Methods for risk assessment of biological control programmes in the Sahelian region ', Cambridge, United Kingdom, 01/09/2004-05/09/2004, .

7th International Conference on Bacillus thuringiensis

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::d04306640f0f85d6d8a0c4a19e27c0e1
https://pure.au.dk/portal/da/publications/methods-for-risk-assessment-of-biological-control-programmes-in-the-sahelian-region(d2eb63b0-7e9d-11dd-a5a8-000ea68e967b).html

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Effects of copper on reproduction of two collembolan species exposed through soil, food and water

Autor: Cornelis A.M. van Gestel, Marianne Bruus Pedersen, Niels Elmegaard

Publikováno v: Environmental Toxicology and Chemistry, 19, 2579-2588. John Wiley and Sons Ltd
Bruus Pedersen, M, van Gestel, C A M & Elmegaard, N 2000, ' Effects of copper on reproduction of two collembolan species exposed through soil, food and water. ', Environmental Toxicology and Chemistry, vol. 19, pp. 2579-2588 . https://doi.org/10.1897/1551-5028(2000)019<2579:EOCORO>2.3.CO;2
Aarhus University
Pedersen, M B, van Gestel, C A M & Elmegaard, N 2000, ' Effects of Copper on Reproduction of Two Collembolan Species Exposed through Soil, Food, and Water ', Environmental Toxicology and Chemistry, vol. 19, no. 10, pp. 2579-2588 .

Extrapolation of laboratory toxicity data to the field is hampered by differences in bioavailability, among other factors. Often, chemical availability of substances in the soil pore water is considered equivalent to bioavailability. However, for col

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4bcd871cbef0c0a73c3e35af4ed23c9a
https://research.vu.nl/en/publications/44ce02d6-1187-4a0e-a153-c89c8d855504

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