Modelling the spatial configuration of refuges for a sustainable control of pests: a case study of Bt cotton
Language
en
Article de revue
This item was published in
Journal of Evolutionary Biology. 2003, vol. 16, n° 3, p. 378-387
Wiley
English Abstract
The 'high-dose-refuge' (HDR) strategy is widely recommended by the biotechnology industry and regulatory authorities to delay pest adaptation to transgenic crops that produce Bacillus thuringiensis (Bt) toxins. This involves ...Read more >
The 'high-dose-refuge' (HDR) strategy is widely recommended by the biotechnology industry and regulatory authorities to delay pest adaptation to transgenic crops that produce Bacillus thuringiensis (Bt) toxins. This involves cultivating nontoxic plants (refuges) in close proximity to crops producing a high dose of Bt toxin. The principal cost associated with this strategy is due to yield losses suffered by farmers growing unprotected, refuge plants. Using a population genetic model of selection in a spatially heterogeneous environment , we show the existence of an optimal spatial configuration of refuges that could prevent the evolution of resistance whilst reducing the use of costly refuges. In particular, the sustainable control of pests is achievable with the use of more aggregated distributions of nontransgenic plants and transgenic plants producing lower doses of toxin. The HDR strategy is thus suboptimal within the context of sustainable agricultural development.Read less <
Keywords
PLANTE TEXTILE
English Keywords
GESTION DES RESISTANCES
HELIOTIS VIRESCENS
cotton
Heliothis virescens
refuges
resistance management
spatial model
sustainable pest control
transgenic crops
Origin
Hal imported