Folia Horticulturae

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Sequent impact of boron sprays on cropping and boron nutrition of ‘Elstar’ apple trees

Paweł Wójcik

Research Institute of Pomology and Floriculture
Pomologiczna 18, 96-100 Skierniewice, Poland
e-mail: pwojcik@insad.pl

The aim of the experiment was to examine the sequent effect of foliar boron (B) sprays on cropping and B nutrition of apple trees. The experiment was carried out in 1997-1998 at the D±browice Experimental Station of the Research Institute of Pomology, Skierniewice on mature ‘Elstar’ apple trees/M.26 planted on a sandy loam soil with low B state. During 1994-1996 apple trees were sprayed yearly with B at petal fall and 2 and 4 weeks later at a rate of 0.67 kg B ha-1 per spray. Trees unsprayed with B served as control. The results showed that B sprays had no sequent effect on cropping, mean fruit weight, and B state in soil, leaves, flowers, and fruit, indicating that response of apple trees to foliar B sprays can be observed only in the treatment-applied year. Therefore, in apple orchards on soils poor in available B, sprays with this element should be recommended annually.

Wójcik P., 2002. Sequent impact of boron sprays on cropping and boron nutrition of ‘Elstar’ apple trees. Folia Horticulturae 14/2: 183-189.