Changes in dry weight and starch content in potato under the effect of herbicides and biostimulants

The aim of the study was to determine interaction herbicides and with biostimulants on accumulation dry matter starch in potato tubers. In a three-year field experiment based method randomised sub-blocks, two factors were taken into account. first factor cultivars: Bartek, Gawin, Honorata. second five methods application: (1) control object without chemical protection (CO); (2) herbicide linuron + clomazone (Harrier 295 ZC) (H); (3) biostimulant Ecklonia maxima (Kelpak SL) – (H K); (4) metribuzin (Sencor 70 WG) (S); (5) sodium para-nitrophenol, ortho-nitrophenol, 5-nitroguaiacol (Asahi (S A). cultivars weather conditions significantly affected content yields starch. used determined as well yields. Most tubers (more by 3.7 g/kg) highest 2.87 1.79 t/ha, respectively), compared object, obtained after application Sencor WG Asahi SL.