Investigations on herbicide resistant grass weeds [Elektronische Ressource] / presented by Natalie Balgheim

University of Hohenheim Institute of Phytomedicine Department of Weed Science Prof. Dr. Roland Gerhards Investigations on herbicide resistant grass weeds Dissertation submitted in fulfilment of the requirements for the degree "Doktor der Agrarwissenschaften" (Dr.sc.agr./ Ph.D. in Agricultural Sciences) to the Faculty Agricultural Sciences presented by Natalie Balgheim from Hannover 2009 This thesis was accepted as a doctoral dissertation in fulfilment of the requirements for the degree “Doktor der Agrarwissenschaften” by the Faculty Agricultural Sciences at the University of Hohenheim on September 15, 2009. Date of oral Examination: November 17, 2009 Examination Committee: Supervisor and Review Prof. Dr. R. Gerhards Co-Reviewer Prof. W. Claupein Additional Examiner Prof. Dr. J. Soukup Vice-Dean and Head of the Committee Prof. Dr. W. Bessei Die Natur hat sich so viel Freihalt vorbehalten, dass wir mit Wissen und Wissenschaft ihr nicht durchgängig beikommen oder sie in die Enge treiben können. Johann Wolfgang von Goethe (1749 -1832) Table of Contents Contents ...................................................................................................Page 1 General Introduction ...............................................................................2 1.1 Whys and wherefores of herbicide resistance.............................