The influence of growth regulator stimolante 66 f on the setting degree and productivity of cherry fruit of the Regina variety

Abstract

Fruit setting and their size can be improved with the application of growth regulators, such as synthetic auxins and gibberellins. The aim was to evaluate the influence of growth regulator Stimolante 66 f on fruit setting and physiological processes, fruit production and its quality. The study subject of the experience was Regina cherry variety was grafted on Gisela 6. The trees were trained as spindle system. The distance of plantation is 4.0 x 2.0 m. The experimental plot it was placed in the orchard “„Vindex-Agro” Ltd. founded in 2012 year. The research was conducted during the period of 2016 year. To study fruit setting, physiological processes,, fruit production and its quality were experimented the following variants of treatment: 1.Control – without treatment; 2. Stimolante 66 f – 0.2 l/ha; 3. Stimolante 66 f – 0.3 l/ha. Active ingredient of Stimolante 66 f is ANA (0,01 g/l) and solution of microelements (0,11 g/l). Grow regulator Stimolante 66 f were sprayed in two periods: the first at the beginning of bloom (16.04.16) and the second - after the fall of the petals (25.04.16). During the research, it was studied the setting degree, average of fruits, tree production and their quality. It was established that the setting degree, physiological processes, average of fruits, fruit production and its quality increase when treating with growth regulators Stimolante 66 in dose of 0.3 l/ha in two periods: the first at the beginning of bloom and the second - after the fall of the petals.