Role of spatial and temporal refuges in the evolution of pest resistance to toxic crops

Lemesle Valérie, Mailleret Ludovic, Vaissayre Maurice. 2010. Role of spatial and temporal refuges in the evolution of pest resistance to toxic crops. Acta Biotheoretica, 58 (2-3) : 89-102. Séminaire de la SFBT. 29, Saint-Flour, France, 14 Juin 2009/17 Juin 2009.

Quartile : Q2, Sujet : BIOLOGY

Résumé : Toxic plants have been used for years in agriculture to control major crop pests. However, the continuous exposure of targeted pests to toxins dramatically increases the rate of resistance evolution (Gassman et al. in Annu Rev Entomol 54:147-163, 2009a; Tabashnik et al. Nat Biotechnol 26:199-202, 2008). To prevent or delay resistance, non toxic host plants can be used as refuges. Our study considers spatial and temporal refuges that are respectively implemented concurrently or alternatively a toxic crop. A conceptual model based on impulsive differential equations is proposed to describe the dynamics of the susceptible and resistant pest populations over time. The mathematical study enlightens threshold values of the proportion of the spatial refuge and key parameters that should help to understand evolution of pest resistance to toxic crop.

Mots-clés Agrovoc : plante toxique, organisme nuisible

Classification Agris : H10 - Ravageurs des plantes
U10 - Informatique, mathématiques et statistiques

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

Auteurs et affiliations

• Lemesle Valérie, CIRAD-PERSYST-UPR SCA (FRA)
• Mailleret Ludovic, INRA (FRA)
• Vaissayre Maurice

Source : Cirad - Agritrop (https://agritrop.cirad.fr/556513/)

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