EN
Field experiments were conducted in 2005–2008 at Bonin. The aim of research was to investigate the metribuzin phytotoxicity, its influence on tuber yield and content of starch and dry mass of 5 potato cultivars (Denar, Lord, Molli, Satina and Sonda). Metribuzin was applied after emergence of potato plants (10–15 cm high). Among 5 tested cultivars, only Sonda and Molli were sensitive to metribuzin, negative influence of metribuzin on tuber yield and yield of starch and dry mass was observed on the same cultivars (Sonda and Molli).