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L’existence d’impacts nefastes du changement climatique sur la production agricole en Afrique subsaharienne est maintenant solidement etablie. Pour documenter les connaissances endogenes relatives au changement climatique, identifier les contraintes qui y sont associees et qui affectent la production et la diversite du niebe et du voandzou au Benin et examiner les strategies adaptatives localement utilisees, 40 villages selectionnes dans differentes zones agroecologiques du Benin ont ete prospectes. Des methodes d’analyses qualitatives et quantitatives ont permis de comprendre que les attaques des insectes aux champs et au cours de stockage restent les contraintes prioritaires. L’analyse du choix des methodes d’adaptation face aux changements climatiques a montre que l’âge du producteur de niebe affecte de facon positive l’adoption des pratiques culturales (p<0,05) et des strategies multiples (p<0,1) ; le sexe influence de facon significative (p<0,001) mais negative le choix des producteurs de voandzou a utiliser des varietes resistantes et de multiples strategies. Le nombre de manoeuvres utilise par ces producteurs influence de facon significative le choix de multiples strategies (p<0,001). Des programmes nationaux de lutte contre les effets lies aux changements climatiques sont a mettre en place afin de preserver les ressources genetiques de niebe et du voandzou au Benin. © 2015 International Formulae Group. All rights reserved . Mots cles: Benin, contraintes, changement climatique, pratique culturale, niebe, voandzou English Title:   Endogenous knowledge and farmers’ perceptions of the impact of the climatic changes on the production and the diversity of cowpea ( Vigna unguiculata (L.) Walp.) and Bambara groundnut ( Vigna subterranea (L.) Verdc.) in Benin English Abstract The existence of harmful impacts of climate change on the agricultural production in sub-Saharan Africa is now firmly established. To document endogenous knowledge relating to the climate change, to identify the constraints which are associated to it and which jeopardize the production and the diversity of cowpea and Bambara groundnut in Benin and to examine the adaptive strategies locally used, 40 villages selected in various agro ecologic areas from Benin were surveyed. Methods of qualitative and quantitative analyses made it possible to understand that the attacks of insects to the fields and during storage remain the priority constraints. The analysis of the choice of the methods of adaptation as regards to the climate changes showed that the age of the producer of cowpea affects in a positive way the adoption of the cultivation methods (p<0.05) and multiple strategies (p<0.1); the sex influences to a significant degree (p<0,001) but negative the choice of the producers of Bambara groundnut to use resistant varieties and multiple strategies. The number of operations used by these producers influences to a significant degree the choice of multiple strategies (p<0,001). National programs to struggle against the effects related to the climatic changes are to be set up in order to preserve the genetic resources of cowpea and Bambara groundnut in Benin. © 2015 International Formulae Group. All rights reserved. Keywords: Benin, Bambara groundnut, constraints, climate change, cowpea, practical farming

international journal of biological and chemical sciences

Connaissances endogènes et perceptions paysannes de l’impact des changements climatiques sur la production et la diversité du niébé (&lt;i&gt;Vigna unguiculata&lt;/i&gt; (L.)Walp.) et du voandzou (&lt;i&gt;Vigna subterranea&lt;/i&gt; (L) Verdc.) au Bénin