Is there a new easy solution for growth regulation for plums?

J. Náměstek, L. Laňar, M. Mészáros
In 2016, an influence of bioregulator product, Florone, was analysed on the growth and production in European plum cultivar 'Tophit'. We tested two concentrations and various spraying frequencies of the product in comparison with prohexadione-Ca treatment and standard control without spraying. The experimental trees were grafted on rootstock St. Julien A and planted in 2012. The length of the shoots was measured prior to the first spray and then after the growth cessation in the autumn. Yield tree-1 and the mean fruit weight were also measured. The results showed that both used concentrations and spraying frequencies of Florone successfully regulated the growth of annual shoots. Both of the Florone treatments as well as the prohexadione-Ca treatment decreased the average length of shoots by more than 45%. Further, the usage of both Florone and prohexadione-Ca brought positive effect on the mean yield, which was increased by 30-40% and moreover had no influence on mean fruit weight which was comparable among all of the treatments. In conclusion, Florone seems to be a promising growth regulation product. To confirm its positive effects, longer testing and verification of its efficiency in other cultivars is desirable.
Náměstek, J., Laňar, L. and Mészáros, M. (2018). Is there a new easy solution for growth regulation for plums?. Acta Hortic. 1206, 197-200
DOI: 10.17660/ActaHortic.2018.1206.27
Prunus domestica L., growth, yield, prohexadione-Ca, florone

Acta Horticulturae