Performance of ‘Maxi Gala’ apple trees as affected by budbreak promoters, in São Joaquim-SC

Pasa, Mateus da Silveira; Felippeto, João; Nava, Gilberto; Souza, André Luiz Külkamp de; Brighenti, Alberto Fontanella; Petri, José Luiz

doi:10.1590/0100-29452018537

Cited by 3 publications

(14 citation statements)

References 16 publications

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“…However, the control treatment always had a longer flowering period. According to Pasa et al [17], the anticipation of flowering with bud break promoters is greater in early applications after completing the dormancy. Bud break promoters shorten the period between full bloom and the end of bloom.…”

Section: Resultsmentioning

confidence: 99%

Thidiazuron with Mineral Oil as Alternative Bud Break Promoter for Apple Trees

Petri¹,

Sezerino²,

Fenili

et al. 2021

JEAI

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Aims: This work aims to evaluate the efficiency of Revent® 500 SC (Thidiazuron) concentrations as a bud breaker promoter in apple trees, cv. Maxi Gala and Supreme Fuji, through phenology, sprouting of buds, fruit set and production per plant. Place and Duration of Study: The experiments were carried out in southern Brazil, municipality of Caçador / SC, during the seasons from 2017 to 2019, in the cultivars Fuji Suprema and Maxi Gala / Marubakaido / M9. Methodology: The treatments were 1. Control (without application); 2. Mineral Oil (MO) 3.5% + Hydrogenated Cyanamide (HC) 0.35%; 3. MO 3.5% + HC 0.5%; 4. MO 3.5% + Thidiazuron (TDZ) 0.005%; 5. MO 3.5% + TDZ 0.01%; 6. MO 3.5% + TDZ 0.015%; 7.MO 3.5% + TDZ 0.02%; 8.MO 3.5% + TDZ 0.025%, applied in stages B and C. Several variables were evaluated such as phenology, sprouting of axillary and terminal buds, fruit set, production per plant and average fruit mass. Results: All treatments with bud breakers advanced the phenological stages in relation to the control in the three years. In the sprouting of the axillary and terminal buds, all treatments were superior to the control. TDZ treatments showed higher sprouting of axillary buds in 2017/18 compared to standard treatments with hydrogenated cyanamide. In plant production, the treatment MO 3.5% + TDZ 0.02% was higher than the other treatments in the 2018/19 and 2019/20 seasons, in both cultivars. TDZ associated with mineral oil is efficient in inducing the sprouting of ‘Maxi Gala’ and ‘Fuji Suprema’ apple trees and can be used to recover sprouts from previous years.

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Section: Resultsmentioning

confidence: 99%

Thidiazuron with Mineral Oil as Alternative Bud Break Promoter for Apple Trees

Petri¹,

Sezerino²,

Fenili

et al. 2021

JEAI

Self Cite

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“…Also in apple, Syncron ® + NitroActive ® produced the same effects as hydrogen cyanamide, independently of the weather conditions ( Petri et al, 2016 ). On the contrary, a 3-year study with warm and cold years showed an earlier full bloom in control trees than in trees treated with either Erger ® (2–6%) or hydrogen cyanamide (0.34%) solutions ( Pasa et al, 2018 ). However, it must be said that trees treated with the highest Erger ® concentrations showed higher production levels than the control trees, as previously shown ( Đmrak et al, 2016 ).…”

Section: Effects Of Agrochemicals On Endodormancy Releasementioning

confidence: 94%

“…In recent years, many agrochemical treatments have been performed in warm areas in order to shorten endodormancy and advance flowering time ( Ardiles and Ayala, 2017 ; Rodrigo et al, 2017 ; Ferreira et al, 2019 ). This practice presents significant problems, however, owing to a lack of knowledge about the efficiency of the treatments and the optimal concentrations and application times for distinct species and cultivars ( Ionescu et al, 2017a ; Rodrigo et al, 2017 ; Pasa et al, 2018 ). In order to assist the promotion of endodormancy release in these treatments, other agrochemicals like Armobreak ® or mineral oil have been used to prevent evaporation and help ensure that the treatments penetrate the plant ( Küden et al, 1995 ; Sagredo et al, 2005 ; López Alcolea, 2018 ).…”

Section: Effects Of Agrochemicals On Endodormancy Releasementioning

confidence: 99%

“…Erger ® + Activ Erger ® have been widely applied in many different species like apple, grapevine, kiwi [ Actinidia deliciosa (A.Chev.) C.F.Liang & A.R.Ferguson], blackberry, sweet cherry and peach to promote endodormancy release, and flowering ( Segantini et al, 2015 ; Ardiles and Ayala, 2017 ; Pasa et al, 2018 ; Ferreira et al, 2019 ; Fowler et al, 2020 ).…”

Section: Effects Of Agrochemicals On Endodormancy Releasementioning

confidence: 99%

“…This trend was also observed in other assays using Erger ® instead of hydrogen cyanamide ( Hawerroth et al, 2010 ). Different works in apple demonstrated that high concentrations of Erger ® (5, 6, and 7%) were more efficient in advancing flowering time and increasing production ( Hawerroth et al, 2010 ; Pasa et al, 2018 ). On the other hand, studies in grapevine and blackberry found no differences between low and high concentrations of Erger ® solutions in terms of flowering time, fruit ripening or production ( Segantini et al, 2015 ; Rosa et al, 2020 ).…”

Section: Agrochemical Application Time and Concentrationmentioning

confidence: 99%

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Advancing Endodormancy Release in Temperate Fruit Trees Using Agrochemical Treatments

2022

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Endodormancy in temperate fruit trees like Prunus is a protector state that allows the trees to survive in the adverse conditions of autumn and winter. During this process, plants accumulate chill hours. Flower buds require a certain number of chill hours to release from endodormancy, known as chilling requirements. This step is crucial for proper flowering and fruit set, since incomplete fulfillment of the chilling requirements produces asynchronous flowering, resulting in low quality flowers, and fruits. In recent decades, global warming has endangered this chill accumulation. Because of this fact, many agrochemicals have been used to promote endodormancy release. One of the first and most efficient agrochemicals used for this purpose was hydrogen cyanamide. The application of this agrochemical has been found to advance endodormancy release and synchronize flowering time, compressing the flowering period and increasing production in many species, including apple, grapevine, kiwi, and peach. However, some studies have pointed to the toxicity of this agrochemical. Therefore, other non-toxic agrochemicals have been used in recent years. Among them, Erger® + Activ Erger® and Syncron® + NitroActive® have been the most popular alternatives. These two treatments have been shown to efficiently advance endodormancy release in most of the species in which they have been applied. In addition, other less popular agrochemicals have also been applied, but their efficiency is still unclear. In recent years, several studies have focused on the biochemical and genetic variation produced by these treatments, and significant variations have been observed in reactive oxygen species, abscisic acid (ABA), and gibberellin (GA) levels and in the genes responsible for their biosynthesis. Given the importance of this topic, future studies should focus on the discovery and development of new environmentally friendly agrochemicals for improving the modulation of endodormancy release and look more deeply into the effects of these treatments in plants.

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Bud-break promoters for the improvement of the budburst of pecan cultivars

Júnior

Pasa

Malgarim

et al. 2022

Pesq. agropec. bras.

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The objective of this work was to evaluate the effect of different bud-breaking substances on the budburst of the Barton, Desirable, and Jackson pecan (Carya illinoinensis) cultivars. The experimental design was a randomized complete block with four replicates. The treatments consisted of spraying different rates of commercial bud-break promoters on the trees of these cultivars, in order to induce budburst. The budburst percentage of axillary buds and the budburst heterogeneity index (BHI) were evaluated. Regardless of the used rate, the application of the hydrogen cyanamide product improved the budburst of the tested cultivars and reduced the BHI. In addition, water soluble N + Ca at 6% and water soluble N + organic C soluble in water at 7% significantly improve the budburst and reduce the BHI of the evaluated cultivars, being, therefore, potential alternatives to replace hydrogen cyanamide.

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Performance of ‘Maxi Gala’ apple trees as affected by budbreak promoters, in São Joaquim-SC

Cited by 3 publications

References 16 publications

Thidiazuron with Mineral Oil as Alternative Bud Break Promoter for Apple Trees

Thidiazuron with Mineral Oil as Alternative Bud Break Promoter for Apple Trees

Advancing Endodormancy Release in Temperate Fruit Trees Using Agrochemical Treatments

Bud-break promoters for the improvement of the budburst of pecan cultivars

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