Key factors for Bt cotton sustainability in smallholder farming: a modelling approach

Vaissayre Maurice, Martin Pierre, Nibouche Samuel. 2006. Key factors for Bt cotton sustainability in smallholder farming: a modelling approach IOBC/WPRS Bulletin, 29 (5) : 183-186. Meeting on Ecological impact of genetically modified organisms. 2, Lleida, Espagne, 1 Juin 2005/3 Juin 2005.

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Résumé : Bt cotton is now being grown worldwide and adopted by many smallholders to overcome their bollworm problems. The management of the whole cotton cropping system is a key factor to ensure the sustainability of pest control by Bt cotton. Practices used in large-scale farming conditions to prevent insect resistance are no longer valid and there is controversy about the strategics to he adopted by smallholders. Modelling is a useful tool for simulating resistance patterns and developing strategies for sustainable bollworm management because many factors have to be considered when investigating the evolution of insect resistance in Bt crops. On the basis of preliminary laboratory results and field observations, we used a model to assess the significance of several of these factors in the Bt resistance process: The model highlighted some key factors: the initial level of resistance in wild populations, the heritability of resistance and the outmigration of resistant individuals from cotton fields at the end of the growing season. Some of these points could now be addressed on the basis of our current state of knowledge, but further research is needed to be able to gain insight into others. (Résumé d'auteur)

Mots-clés Agrovoc : Gossypium, Plante transgénique, Helicoverpa armigera, Petite exploitation agricole, Durabilité, Modèle mathématique

Mots-clés géographiques Agrovoc : Afrique

Classification Agris : F08 - Systèmes et modes de culture
U10 - Méthodes mathématiques et statistiques
H10 - Ravageurs des plantes

Axe stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

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Autres liens de la publication

  • Document en bibliothèque
  • Localisation du document : CD_BR13297 [(Bibliothèque de Lavalette)] ; CD_BR13298 [(Bibliothèque de Lavalette)] ; CD_F30 OIL 14333 [(Bibliothèque de Lavalette)]

Source : Cirad - Agritrop

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