1. Department of Plant Biology and Soil Science, University of Vigo, 36310 Vigo, Spain
2. Spanish Weed Science Society (Sociedad Española de Malherbología, SEMh), 50059 Zaragoza, Spain
3. European Weed Research Society (EWRS), 6705 Wageningen, The Netherlands
4. Misión Biológica de Galicia (CSIC), Apartado 28, 36080 Pontevedra, Spain
5. REQUIMTE/LAQV, Pharmacognosy Laboratory, Department of Chemistry, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal