Timing and rates of application of NAA as blossom and fruitlet chemical thinner on apple cv.  and #712;Braeburn and #712;

Fruk, Mladen; Vukovi, Marko; Jatoi, Mushtaque Ahmed; Fruk, Goran; Buhin, Josip; Jemri, Tomislav

doi:10.9755/ejfa.2016-07-910

Cited by 4 publications

(3 citation statements)

References 16 publications

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“…Numerous chemical bloom thinning treatments have been used to reduce the flower density in apple trees, including lime sulfur, octyl alcohol, ammonium thiosulfate (ATS), 1-naphthaleneacetic acid (NAA), and 6-benzyladenine (BA) (Stover et al, 2001;Stopar and Lokar, 2003;Yoo et al, 2016;Yoo et al, 2019;Fruk et al, 2017;Allen et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Effects of Bloom Thinning with Lime Sulfur on Fruit Set, Yield, and Fruit Quality Attributes of ‘RubyS’ Apples

Win,

Lee,

Park

et al. 2022

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Bloom thinning is an important practice that influences the profitability of the orchard. Hence, we assessed the effect of chemical bloom thinning on thinning efficiency and fruit quality of 'RubyS' apples. Lime sulfur was applied as a bloom thinning agent at 1, 1 + 3, and 2 + 4 days after full bloom (DAFB), and non-bloom thinning trees were used as controls. Compared to the control and bloom thinning treatments at 1 DAFB and 2 + 4 DAFB, the application of bloom thinning at 1 + 3 DAFB greatly decreased the number of fruits per cluster in both terminal and lateral flowers. Although the application of bloom thinning at 2 + 4 DAFB decreased the number of fruits per cluster in the terminal flower, it did not affect the number of fruits per cluster in the lateral flower when compared to the control. At harvest, the number of fruits per tree (fruits/ tree) and yield (kg/ tree) was significantly higher in control trees than in bloom-thinned trees. However, fruit quality attributes including fruit weight and size, flesh firmness, soluble solids content, area of red-blushed surface, and a* value in the fruit were significantly improved by bloom thinning at 1 + 3 DAFB. Therefore, this study suggested that applying bloom thinning at 1 + 3 DAFB could serve as an effective thinning treatment to manage crop load in trees and improve the quality of 'RubyS' apple fruits.

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Section: Introductionmentioning

confidence: 99%

Effects of Bloom Thinning with Lime Sulfur on Fruit Set, Yield, and Fruit Quality Attributes of ‘RubyS’ Apples

Win,

Lee,

Park

et al. 2022

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“…)는 국내 주요 과실로 2020년 재배면적은 31,598ha에서 2021년 33,439ha로 꾸준히 증가하 고 있는 추세이다 (KOSIS, 2021). 사과재배는 전정, 적화, 적과, 수확 등 다양한 작업이 진행되지만, 특히 국내에서는 적과작업 은 고품질 과실생산을 목적으로 격년 결실을 방지하고 불필요한 양분 소모를 줄여 과실비대 촉진을 위한 필수적인 작업으로 많 은 노동력이 필요하다 (Dennis, 2000;Kook et al, 2009;Greene and Costa, 2013;Yoo et al, 2014;Fruk et al, 2017). 그러 나 현재 우리나라의 농업인 수는 2013년 2,133,798명에서 2021년 1,823,982명으로 14.5% 감소하였고, 70세 이상 고령 농업 인 비율이 2013년 30.3%에서 2021년 38.2%로 매년 증가하여 농촌 고령화가 빠르게 진행되고 있어 농촌의 노동력 부족과 인 건비 상승이 심각해지고 있는 실정이다 (KOSIS, 2021).…”

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Effect of Fatty Alcohol and 6-Benzyladenine on Fruit Set and Fruit Quality of ‘Fuji’ Apples

Shin,

Yoo,

Kim

et al. 2023

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This study was investigated the effect of fatty alcohol (FA) and 6-benzyladenine (6-BA) thinning treatments on the fruit set and fruit quality attributes of 'Fuji/M.9' apples. Trees were treated with FA (single, ×500 dilution), FA (double), 6-BA (×1,000 dilution), 6-BA (×500 dilution), FA (single) + 6-BA (×1,000 dilution), FA (double) + 6-BA (×500 dilution), and carbaryl. FA (80.5% a.i.) treatment was applied at 80% blossom of terminal flowers and 60-80% blossom of lateral flowers, and 6-BA (7.4% a.i.) and carbaryl treatments were applied at 8-mm size of central fruit. The total fruit set rate per cluster was observed 61.0% for terminal flowers and 37.3% for lateral flowers in the control but it was decreased to 35.2-50.6% for terminal flowers and 9.7-23.8% for lateral flowers in the thinning treatments, respectively. The rate of central fruit per terminal flower cluster was observed 92.6% in the control but it was 65.2-94.4% in FA and 6-BA treatments. However, the rate of non-fruit set per terminal flower cluster was observed 2.9% in the control but it was increased to 7.5 -14.2% in the thinning treatments, and the rate of one fruit set per terminal flower cluster was 14.1% in the control but it was increased to 20.6-33.9% in the thinning treatments. In addition, the rate of non-fruit set per lateral flower cluster was observed 19.6% in the control but it was decreased to 32.2 -69.0% in the thinning treatments. The fruit quality attributes were not different in all treatment groups at harvest, except fruit weight. Therefore, our results reveal that FA and 6-BA treatments have the significant effects in reducing the fruit rate in 'Fuji' apple.

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“…Octyl Alcohol 처리가 '후지' 사과의 착과와 과실품질에 미치는 영향 때문에 많은 노동력이 투입된다 (Childers et al, 1995;Dennis, 2000;Wertheim, 2000;Kook et al, 2009;Greene and Costa, 2013;McArtney et al, 2013;Yoo et al, 2014;Milić et al, 2016;Fruk et al, 2017). 또한 농작업에 필요한 노동력이 적기에 수행되지 않을 경우 생산물의 질적, 양적 저하를 가져와 소득 감소로 나타나게 된다 (Makeham and Malcolm, 1993;Kay and Edwards, 1994).…”

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Effects of Octyl Alcohol Treatments on Fruit Set and Fruit Quality Attributes in ‘Fuji’ Apples

Yoo¹,

Kwon²,

Cho³

et al. 2019

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This study was carried out to investigate the effect of lime sulfur and octyl alcohol treatments on the fruit set and fruit quality of 'Fuji' apples. Lime sulfur (Bé 22°) was sprayed twice at 2 and 3 days after the central flower's full bloom (CFFB). Octyl alcohol (81%) was applied at 1 day (1D), 2 days (2D), or 3 days (3D) after CFFB in 'Fuji/M.9' trees. The number of fruits per cluster in terminal flowers (TF) was 3.71 for the control and 1.85 for the octyl alcohol 2D treatment, the number in lateral flowers (LF) were very low -0.96 and 1.01 for the octyl alcohol 2D and 3D treatments, respectively-compared with untreated (3.27). The percentage of central fruit per cluster was 82.3% in the TF and 63.8% in the LF for the control, and 60.6% in the TF and 33.9% in the LF for the octyl alcohol 2D treatment. Furthermore, the rate of non-fruit set per cluster in the TF was 0.7% for the control and 19.7% for the octyl alcohol 2D treatment. Single fruit rate per cluster in the TF was very low for the control but higher in the octyl alcohol 2D treatment. In addition, the percentage of clusters with three or more than four fruits per cluster was 80.3% for the control, but lower for the octyl alcohol 2D treatment. There was no difference in flower bud differentiation rate and fruit quality between the control and octyl alcohol treatments. Overall, the results indicated that octyl alcohol treatment positively affected flower thinning compared with the control.

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Timing and rates of application of NAA as blossom and fruitlet chemical thinner on apple cv. and #712;Braeburn and #712;

Cited by 4 publications

References 16 publications

Effects of Bloom Thinning with Lime Sulfur on Fruit Set, Yield, and Fruit Quality Attributes of ‘RubyS’ Apples

Effects of Bloom Thinning with Lime Sulfur on Fruit Set, Yield, and Fruit Quality Attributes of ‘RubyS’ Apples

Effect of Fatty Alcohol and 6-Benzyladenine on Fruit Set and Fruit Quality of ‘Fuji’ Apples

Effects of Octyl Alcohol Treatments on Fruit Set and Fruit Quality Attributes in ‘Fuji’ Apples

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