EN
Weeds, the detrimental plant organisms connected with the man's activity, need to be controlled. Human development and increasing mobility created an intentional or accidental introduction of the plants, of ten exotic ones, into new places, and ecosystems. Prevailing method of weed control consists in application of the chemicals. They are acting rapidly and radically eliminate the density of imdesirable plant population. However, the chemical formulas are often little selective, contaminate the environment and their effectiveness drops very fast with arising resistance of plant organisms. Biological methods of weed population control seem to bring a solution of this problem. Such methods are of particular research interest on the terrains of river banks, because of ecological reasons - a threat of surface water pollution. Rumex confertus Willd. plants seem to be complying with the qualification criteria as requested to biological weed control.