Folia Horticulturae

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Effect of bioregulators and summer pruning on growth and cropping of ‘Rubin’ apple trees

Stanisław Porębski, Bernadeta Rzeźnicka, Władysław Poniedziałek

Department of Pomology and Apiculture
Faculty of Horticulture, Agricultural University in Kraków
29 Listopada 54, 31-425 Kraków, Poland
e-mail: sporebski@ogr.ar.krakow.pl

The effect of spraying with Regalis (prohexadion Ca) and Arbolin (BA + GA3) and of shoot heading of ‘Rubin’ trees grafted on P22 rootstocks was investigated in the years 2002-2004 on growth and cropping trees. The spraying of trees with Regalis and Arbolin resulted in shortening of terminal shoots on limbs but did not affect the trunk cross-section area. The fruit setting of trees treated with Arbolin was lower in the second year of the research. Cumulative yields of two years and the yield efficiency were lower after Arbolin treatment. A tendency to higher yields and higher yield efficiency was observed after spraying with Regalis at concentration of 1.5 g l-1.

Porębski S., Rzeźnicka B., Poniedziałek W., 2006. Effect of bioregulators and summer pruning on growth and cropping of ‘Rubin’ apple trees. Folia Horticulturae 18/2: 37-46.