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The combined effect of various GM-contamination sources in a case study of oilseed rape

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Keywords
  • Farming Systems
  • Specific Methods
  • "Organics" In General
  • Consumer Issues
Disciplines
  • Agricultural Science
  • Law

Abstract

The effect of A meta-analysis of gene flow between fields of oilseed rape: consequences to management measures to reduce GM-pollination in organic and conventional farming The combined effect of various GM-contamination sources in a case study of oilseed rape Christian Damgaard 1, Gösta Kjellsson 1, and Christian Haldrup 2 1 Department of Terrestrial Ecology, DMU, Vejlsøvej 25, 8600 Silkeborg, Denmark 2 Danish Agricultural Advisory Service, Udkærsvej 15, 8200 Århus, Denmark Abstract + tekst (CFD) � Introduction Tolerance limits of GM-contamination (+ EU, konventionelt og økologisk landbrug, GK) Stages of the seed crop (udsæd, frøbank, pollination, høst (forurening ved maskiner), transport, lagring) (GK) Presently, when the level of possible GM-contamination in different agricultural systems is evaluated in order to generate advisory opinions (ref.), the amount of GM-contamination at each stage is predicted or estimated under conditions, which may be compared to a moderate worst-case scenario (?). Afterwards when the combined effect of the various GM-contamination at the different stages is calculated the worst-case predictions of the different stages are added. This adding of the worst-case predictions at the different stages in order to estimate the combined effect of GM-contamination implicitly makes some important assumptions that needs to be discussed. When the worst-case predictions of the different stages are added, then it is indirectly assumed that if a worst-case scenario event occur in one stage then the worst-case scenario events will also occur at all the other stages. It is the claim of this article that the adding of worst-case predictions may be a relevant approach when a single farm is considered, e.g., in the matter of legal issues concerning a single farmer. However, if the tolerance limits are at the level of the manufactured food and the seeds from a large number of farmers are mixed at a food manufactory plant, then the

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