Weed control : sustainability, hazards and risks in cropping systems worldwide / editors, Nicholas E. Korres, Department of Crop, Soil and Environmental Sciences, University of Arkansas, Arkansas, USA, Nilda R. Burgos, Department of Crop, Soil and Environmental Sciences, University of Arkansas, Arkansas, USA, and Stephen O. Duke USDA, Agricultural Research Service, Natural Products Utilization Research, Cochran Research Center, University of Mississipi, USA.