Wpływ kwasu 2-chloroetanofosfonoiuego (Ethrel) na ukorzenianie się zdrewniałych sadzonek czarnych porzeczek [Effect of 2-chloroethylphosphonic acid (Ethrel) on the rooting of the blackcurrant hardwood cuttings]

Abstract

The effect of Ethrel on root formation in the blackcurrant (cv. Blacksmith) hardwood cuttings was investigated in five different periods of the year. Low concentrations of Ethrel (up to 250 ppm) stimulated rooting, whereas higher concentrations (above 250 ppm) had a harmful effect on root formation. It is suggested that ethylene can act as a rooting promoter (when low concentrations of Ethrel were used) or as rooting inhibitor (when Ethrel was used in high concentrations). Complete cessation of the inflorescence development was observed in cuttings treated with Ethrel at 100 ppm and higher concentrations.