EN
Experiments were carried out in 2005–2007 in the Research Institute of Vegetable Crops at Skierniewice to evaluate the effectiveness of weed control by using metribuzin applied with microrates method. Metribuzin applied in 4–6 treatments at the doses of 36 g/ha after emergences of carrot was effective in weed control. Application of this herbicide at very low doses allowed to reduce the amount of herbicide by aproximately 25–50%. Metribuzin was caused phytotoxicity symptoms on carrot plants but no permanent damages to the crop was stated. The yield of carrot roots increased after applying metribuzin with micro-rate method. Highly significant correlation (R2 = 0.998) showed that with increasing of weed control, the higher yield of carrot roots was obtained.