Abstract: Miao Z. (2007). Modeling Responses of Leafy Spurge Dispersal to Control Strategies. J. Integr. Plant Biol. 49(12): 1681-1692. Upon re-analysis of the model, an error was discovered and the results published in the Journal of Integrative Plant Biology 49(12): 1681-1692 are no longer valid. As such, I retract the above article. I am sorry for any inconvenience to the JIPB journal. Zewei Miao Grant F. Walton Center for Remote Sensing & Spatial Analysis Cook College, Rutgers University, New Brunswick, NJ 08901-8551, USA E-mail: zmiao@crssa.rutgers.edu