EN
The effect of the herbicide Harpun 500 SC on the counts of soil microbes was determined in a laboratory experiment conducted at 25°C and 60% capillary water capacity of soil. The herbicide was applied at the following doses (mm3 • kg-1 d.m. of soil): 0, 0.83 (optimal), 41.5, 83, 124.5 and 166. The counts of soil microbes were determined on day 28, 56, 84 and 112. It was found that the herbicide did not disturb the microbiological equilibrium of soil when applied at the recommended dose, i.e. 0.83 mm3 • kg-1 d.m. of soil. Higher doses altered only faintly the counts of the tested soil microorganisms.