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Objectif: L’objectif de cette etude est de determiner l’impact des degâts des bruches sur le pouvoir germinatif des graines de niebe et d’identifier des varietes resistantes ou tolerantes aux attaques de bruches pendant le stockage. Le bruche ( Callosobruchus maculatus ) est un petit coleoptere dote de taches sombres sur les elytres. C’est un parasite qui s’attaque aux graines pendant l’emmagasinage. Methodologie et resultats: Au cours de ce travail, nous avons etudie le comportement de quatre (4) varietes ameliorees de niebe (Yamashi, Mujilanga, IT82D-889 et Diamant) selectionnees par l’Institut National d’Etudes pour la Recherche Agronomiques centre de Ngandajika sur le developpement de Callosobruchus maculatus  infeste dans les graines de ces varietes. Cette etude etait menee in vitro au laboratoire du centre de Recherche de l’INERA Ngandajika. Les resultats revelent que le taux d’accroissement des bruches infestes pendant 60 jours varie de 50.41% a 91.99%. Et la variete Diamant a presente un pouvoir germinatif beaucoup plus faible 0.75% que les trois autres varietes (Mujilanga 7.75%, Yamashi 8.25% et IT82D-889 12.75%. Conclusion et application des resultats: Cette etude a permis de conclure que la variete Diamant a perdu le pouvoir germinatif apres une duree de conservation de 60 jours. Ces resultats suggereraient que pour une periode de conservation apres recolte, les graines de niebe de la variete Diamant ne peuvent plus etre considerees comme semences. Il est par consequent important de demander aux producteurs de semences de cette variete de ne pas utiliser la semence de cette variete apres 60 jours de conservation sans traitement phytosanitaire et d’utiliser ainsi la semence fraichement recoltee. Mots cles: pouvoir germinatif, resistance varietale English Abstract Objective: The objective of this study is to determine the impact of damage from weevils on the germination of the seeds of cowpea and identify varieties resistant or tolerant to attack by weevils during storage.  Callosobruchus maculatus . The weevil ( Callosobruchus maculatus ) is a small beetle with dark spots on the wing covers. This parasite attacks the seeds during storage.  Methodology and results: During this work, we studied the behaviour of four (4) improved varieties of cowpea (Yamashi, Mujilanga, IT82D-889 and Diamond) selected by the National Research Institute for Agronomic Research centre on the development Ngandajika of Callosobruchus maculatus infested in the seeds of these varieties. This study was conducted in vitro laboratory research centre INERA Ngandajika. The results reveal that the rate of increase of weevils infested for 60 days ranged from 50.41% to 91.99%. Diamond and variety germination presented a much lower 0.75% than the other three varieties (Mujilanga 7.75%, 8.25% and IT82D Yamashi-889 12.75%. Conclusion and application of results: This survey permitted to conclude that the variety Diamant lost the germinating power after a length of conservation of 60 days. These results would suggest that for one period of conservation after harvest, the seeds of cowpea of the variety Diamant could not be considered more like seeds. It is therefore important to ask the producers of seeds of this variety to not to use the seed of this variety after 60 days of conservation without phytosanitary treatment and to use the freshly harvested seed. Keywords: germinating power, variety resistance

Dégâts des bruches sur le pouvoir germinatif des graines de quatre variétés de Niébé infesté pendant 60 jours à Ngandajika