ISSN:
Volume 1, Number 1 (2023)
Year Launched: 2023
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SEQUENTIAL APPLICATION OF BUD BREAK PROMOTERS IN APPLE (Mallus domestica) CV. ‘MAXI GALA’ AND ‘FUJI SUPREMA’

Volume 1, Issue 1, January 2023     |     PP. 1-16      |     PDF (682 K)    |     Pub. Date: December 26, 2023
DOI: 10.54647/ajasr2011001    26 Downloads     581 Views  

Author(s)

José Luiz Petri, M.Sc., Teacher, UNIARP, Caçador-SC. , Brazil
André Amarildo Sezerino, Dr. Research, Estação Experimental de Caçador, Caçador, SC, Brazil
Caroline de Fátima Esperança, M.Sc, Teacher, UNIARP, Caçador, SC, Brazil

Abstract
Sequential application consists of reapplying the dormancy break treatment for greater uniformity of bud breaking and flowering. The objective of this study was to assess the effect of the reapplication of bud break promoters on the flowering and bud breaking of ‘Maxi Gala’ and ‘Fuji Suprema’ apple cultivars. The experiment was carried out in an experimental orchard located in the municipality of Caçador, SC, Brazil (26º46'S latitude, 51º W longitude, 960 m altitude), during the seasons from 2016/2017 to 2019/2020. Treatments were applied in stages B and C, and those with reapplication were applied from 7 to 14 days after the first application. Phenology, axillary and terminal bud breaking, fruit set, production per plant and average fruit mass were evaluated. Phenology was advanced compared to the control treatment with the application of bud break promoters, regardless of application stage and sequential application. However, treatments applied in stage B promoted a greater advance compared to the applications in stage C. Regarding axillary and terminal bud breaking, all treatments were superior to the control treatment in the four years evaluated. In some seasons, the sequential application of bud break promoters increased axillary and terminal bud breaking compared to the standard treatment, with a single application. Fruit set was reduced in some treatments compared to the control in 2016/17. Some treatments with reapplication improved the yield of apple trees, and the MO 3.5% + HC 0.7% stage B + MO 3.5% 10DA treatment increased the average production per plant by 78.5% compared to the control treatment and by 130.9% compared to the single-application treatment. On average, the reapplication of bud break promoters increased the average fruit mass.

Keywords
Malus domestica, dormancy breaking, phenology

Cite this paper
José Luiz Petri, André Amarildo Sezerino, Caroline de Fátima Esperança, SEQUENTIAL APPLICATION OF BUD BREAK PROMOTERS IN APPLE (Mallus domestica) CV. ‘MAXI GALA’ AND ‘FUJI SUPREMA’ , American Journal of Agricultural Science and Research. Volume 1, Issue 1, January 2023 | PP. 1-16. 10.54647/ajasr2011001

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