Effect of Different Thinning Techniques on Fruit Set, Leaf Area, Yield and Fruit Quality Parameters of Prunus persica, L. Batsch cv. Floridaprince

El-Boray, M. S. S.; Shalan, A. M.; Khouri, Z.M.

doi:10.3923/thr.2013.1.13

Cited by 20 publications

(14 citation statements)

References 4 publications

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“…Similar results were found in other peach thinning researches, in which thinned plants showed lower yield due to the reduced number of fruits per plant (Scarpare Filho et al, 2000;El-Boray et al, 2013). According to Osborne & Robinson (2008), thinning reduces plant yield; however, it also promotes a significant increase in the average fruit size, improving commercial value, which compensates yield losses.…”

Section: Resultssupporting

confidence: 81%

“…In 2014, plants at the pink bud, full bloom, and 5-mm fruit stages, in the average of treatments, showed higher fruit weight than those thinned at the 20-mm fruit stage. Performing early thinning on the flowering stages may increase the final fruit size, which can be explained by a reduction in the initial carbohydrate competition (El-Boray et al, 2013). An increment of fruit average weight due to early thinning was also observed by Szot (2010) in apple (Malus domestica Borkh.)…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Heading of shoots and hand thinning of flowers and fruits on 'BRS Kampai' peach trees

Oliveira

Marodin

Almeida

et al. 2017

Pesq. agropec. bras.

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-The objective of this work was to evaluate the effect of shoot heading and of hand thinning in different development stages of flowers and fruits on the fruit production and quality of 'BRS Kampai' peach (Prunus persica) trees. The experiment was performed during three crop years, under the conditions of the "Depressão Central" region in the state of Rio Grande do Sul, Brazil, and the treatments were: T1, heading of half of the mixed shoot; T2, heading of one third of the mixed shoot; T3, flower thinning in the pink bud stage; T4, thinning at full bloom; T5, thinning of fruit with 5 mm; T6, thinning of fruit with 20 mm; and T7, no thinning or heading (control). Fruit production and quality were evaluated. Plants with no thinning were more productive, but showed high frequency of fruits with a diameter smaller than 60 mm. Shoot heading reduced production per tree and resulted in small-sized fruit. Thinning time did not affect production, and fruit size was greater when thinning was performed at the bloom stage. 'BRS Kampai' peach trees can be thinned starting at bloom, which provides greater fruit size, with no production loss.Index terms: Prunus persica, fruit quality, yield. Desponte de ramos e raleio manual de flores e frutos em pessegueiros 'BRS Kampai'Resumo -O objetivo deste trabalho foi avaliar o efeito do desponte de ramos e do raleio manual realizado em diferentes estágios de desenvolvimento de flores e frutos sobre a produção e a qualidade dos frutos do pessegueiro (Prunus persica) 'BRS Kampai'. O experimento foi realizado durante três safras nas condições da Depressão Central do Rio Grande do Sul, e os tratamentos foram: T1, desponte da metade do ramo misto; T2, desponte de um terço do ramo misto; T3, raleio de flor no estádio de balão rosado; T4, raleio na plena floração; T5, raleio do fruto com 5 mm; T6, raleio do fruto com 20 mm; e T7, sem desponte ou raleio (testemunha). Avaliaram-se a produção e a qualidade dos frutos. Plantas sem raleio foram mais produtivas, mas com alta frequência de frutos com diâmetro inferior a 60 mm. O desponte reduziu a produção por planta e ocasionou frutos pequenos. A época de raleio não afetou a produção, e o diâmetro dos frutos foi maior quando o raleio foi realizado durante a floração. Pessegueiros 'BRS Kampai' podem ser raleados a partir da floração, o que proporciona maior tamanho dos frutos, sem reduzir a produção.Termos para indexação: Prunus persica, qualidade de fruto, produtividade.

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Section: Resultssupporting

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Heading of shoots and hand thinning of flowers and fruits on 'BRS Kampai' peach trees

Oliveira

Marodin

Almeida

et al. 2017

Pesq. agropec. bras.

View full text Add to dashboard Cite

show abstract

“…While yield and berries per plant increased close to 2.3 and 4.0 times, respectively, as mean value of both plant ages, the canopy leaf area decreased by around 40%. This suggests that fruits have higher ability to attract assimilates than leaves and that fruits compete more between them than with shoots, as observed in several species (Gautier et al, 2001;Minchin et al, 2010;El-Boray et al, 2013). Our study showed that 'Brigitta' blueberry fruit weight, %DM and sugars decreased curvilinearly with increasing fruit load (Figure 1 and 2).…”

Section: Discussionsupporting

confidence: 69%

“…In fact, fruit weight and soluble sugar concentration typically decrease when the ratio between fruit number and leaf area (fruit load) is high. This is because the carbon source offer (mainly leaves) fails to meet the demand of carbon sinks (mainly fruits) (Seehuber et al, 2011;El-Boray et al, 2013). In order to balance fruit load, pruning is a crucial practice in blueberry production, with a positive effect on vegetative growth and fruit weight (Strick et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Pruning severity affects yield, fruit load and fruit and leaf traits of 'Brigitta' blueberry

Jorquera-Fontena

Alberdi

Franck

2014

J. Soil Sci. Plant Nutr.

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Pruning is crucial to balance productivity and fruit quality in blueberry orchards. Slight, conventional and severe pruning treatments were applied on 4-and 5-year old bluberry plants cultivar 'Brigitta' to evaluate their effect on yield, leaf area, gas exchange and fruit load as driver of fruit quality traits. Yield and berries per plant decreased with increasing pruning severity, whereas canopy leaf area increased. The resulting fruit load ranged from 0.2 to 1.4 fruit per cm 2 leaf area. Fruit weight, dry matter, glucose and fructose were negatively related to fruit load, with fruit fresh weight decreasing to greater extent than sugars. Berry weight was restricted by source limitation during the initial cell division and initial cell enlargement fruit growth phases as indicated by decreased relative growth rate. Light-saturated photosynthetic rate diminished with increasing pruning severity indicating a sink limitation of photosynthesis. The strong association between photosynthesis and stomatal conductance shows a high corregulation in the response of carbon and water exchange to sink demand. Our results underline agronomic and physiological factors determining blueberry yield and fruit quality and can be useful for agro-technical management.

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“…In contrast, for European plums, Pavanello et al (2018) found no effect of ammonium thiosulfate on reducing fruit set. Although, for peaches, El-Boray et al (2013) reported that ammonium thiosulfate at 3% v/v and soybean oil at 9% v/v reduced fruit set, and increased leaf area, indicating that somehow these treatments also stimulate vegetative growth, and maybe it causes restriction of assimilates for the flowers.…”

Section: Resultsmentioning

confidence: 99%

Efficacy of Chemical Agents in Reducing Fruit Set of ‘Leticia’ Japanese Plums

Carminatti¹,

Marchioretto²,

Francescatto³

et al. 2018

Agrarian

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Looking for improving 'Leticia' Japanese plums fruit quality and size, thinning of flowers and fruits have to be done early in the spring. Although, there are very few studies showing the effectiveness of chemical compounds that effectively promote thinning of stone fruits, especially for the Southern Brazilian conditions. Thus, the objective of this study was to investigate the effectiveness of several agents with potential to promote thinning at blooming or post blooming in 'Leticia' Japanese plums. To do so, in the cropping season of 2014/2015 the treatments abscisic acid, benzyladenine, benzyladenine + gibberellic acid 4+7 , ethephon, metamitron, vegetal oil, and calcium chloride were sprayed in 'Leticia' plums looking for evaluating the effects on the fruit set. The treatments ABA, benzyladenine, metamitron, benzyladenine + gibberellic acid 4+7 , calcium chloride, and vegetal oil are effective to reduce fruit set of 'Leticia' plums in Southern Brazil.

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Effect of Different Thinning Techniques on Fruit Set, Leaf Area, Yield and Fruit Quality Parameters of Prunus persica, L. Batsch cv. Floridaprince

Cited by 20 publications

References 4 publications

Heading of shoots and hand thinning of flowers and fruits on 'BRS Kampai' peach trees

Heading of shoots and hand thinning of flowers and fruits on 'BRS Kampai' peach trees

Pruning severity affects yield, fruit load and fruit and leaf traits of 'Brigitta' blueberry

Efficacy of Chemical Agents in Reducing Fruit Set of ‘Leticia’ Japanese Plums

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