EN
The aim of the study was to determine the response of weeds and drilled onion to pendimethalin CS (Stomp Aqua 455 CS), a new formulation for vegetable crops in Poland. Experiments were carried out in 2009–2010 at the Research Institute of Vegetable Crops at Skierniewice and in Głuchów Dolny. Stomp Aqua 455 CS was applied at the dose of 2.5–3.5 l/ha and the results were compared to the standard EC formulation (Stomp 330 EC – 3 l/ha). Onion was treated by herbicides directly after sowing and post emergence, at 1–2 true leaves stage. It was proved a good efficacy of tested formulation of pendimethalin in each experiment. All tested formulations of pendimethalin were selective to drilled onion in both dates of application. The yield of onion increased after herbicides application, and the differences were significant, as compared to the control object.