Roles of inland valleys and maize cropping systems in the management of stem borers and their natural enemies in the humid forest of Cameroon [Elektronische Ressource] / von Adenirin Chabi-Olaye

Roles of Inland Valleys and Maize Cropping Systems in the Management of Stem Borers and their Natural Enemies in the Humid Forest of Cameroon Von der Naturwissenschaftlichen Fakultät der Universität Hannover zur Erlangung des akademischen Grades eines Doktors der Gartenbauwissenschaften - Dr. rer. hort. - genehmigte Dissertation von Adenirin Chabi-Olaye (MSc) geboren am 04 November 1962 in Benin 2005 Referent: Prof. Dr. Christian Borgemeister Korreferent: Dr. Fritz Schulthess Tag der Promotion: 03.05.2005 Dedicated to my late daughter CHABI-OLAYE Sabirath Temalie Adetutu iAbstract Roles of Inland Valleys and Maize Cropping Systems in the Management of Stem Borers and their Natural Enemies in the Humid Forest of Cameroon Adenirin Chabi-Olaye The present research project aimed at, (i) assessing the role of inland valleys in the invasion of up-land maize fields by both stemborers and their natural enemies, and (ii) investigating the effects of intercropping and soil fertility on the incidence and severity of maize stemborers and on the impact of their natural enemies in the humid-forest zone of Cameroon. To this end, surveys and experiments on migration and population dynamics of pests and their natural enemies were conducted in several inland valley and adjacent upland maize fields in three different villages.