In this paper work, we present the results of our studies concerning the effects of the herbicides linuron, dimetenamid and treflan upon the symbiotic nitrogen bacteria applied in seeds. We have tested herbicide action for 4 concentrations: normal concentration – the normally recommended herbicide dose, double concentration (2x normal dose), triple concentration (3x normal dose), and half of the recommended dose (1/2x normal dose). The results achieved made evident that strains have different reaction to linuron and dimetenamid, and these reactions are not correlated with the concentration. We may explain this situation through the different strain capacity of tolerance under the action exerted by these herbicides.

tolerance; herbicides; Bradyrhizobium; Rhizobium

Presentation: oral