A very troublesome weed in the cultivation of flowerbulb crops is the perennial root weed Rorippa sylvestris. Characteristic for this weed is the ability to regenerate numerous new plantlets on small, easily distributed root parts and to grow rapidly in all soil types. Control of Rorippa sylvestris is mainly based on measures preventing mechanical distribution of root parts and on treatments with a combination of the herbicides 2-methyl-4-chlorophenoxyacetic acid (MCPA) and 2,4-dichlorophenoxyacetic acid (2,4-D). Some characteristics of this weed, e.g., the vegetative propagation potential and the survival at different soil depths, as well as the effect of different herbicides and combinations were studied in greater detail. Moreover, hot-water treatments and conditions during storage were tested for their ability to reduce spread of Rorippa root parts with lily bulbs. Data of these experiments are presented and the prospects for practical application are discussed.