The bioregulators Auxol and Karp are successfully used as one of the key auxiliary measures in apple production, which is fruit thinning. These bioregulators are particularly effective in regulating the size of the central fruit. The application concentration varies depending on the variety and the size of the central fruit, whereby the use of Auxol and Karp solutions in a concentration of 0.5-1% is recommended. For the Granny Smith variety, it is recommended to use 1% Karp in combination with 0.1% Glue.
The action of auxin and cytokinin is observed by the dominance of the central fruit. Bioregulators stimulate accelerated cell division in the central fruit, which results in its faster growth. At the same time, side fruits are left without an adequate amount of nutrients, which stops their growth and leads to their weaker development. As a consequence, these side fruits drop because they are not developed enough to survive on the tree.
Application of the bioregulators Auxol and Karpo in the correct concentration and at the appropriate time enables optimal regulation of fruit thinning, which achieves the desired quality and size of apples. It is important to follow the recommended concentrations and apply them in accordance with the specifics of the variety and the size of the central fruit, in order to achieve the desired result and improve the overall productivity of the orchard.
Consultations on application: Milica Jevtić, BSc +381 (0)64 646 97 41
