Prohexadione calcium reduces vegetative growth and increases fruit set of ‘Smith’ pear trees, in Southern Brazil

Carra, Bruno; Spagnol, Daniel; Abreu, Everton Sozo de; Pasa, Mateus da Silveira; Silva, Carina Pereira da; Hellwig, Cristiano Geremias; Fachinello, José Carlos

doi:10.1590/1678-4499.298

Cited by 13 publications

(14 citation statements)

References 21 publications

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“…Carra et al (2016), studying the effect of the application of increasing doses of PCa on 'Le Conte' pears, reported that PCa did not influence fruit yield, soluble solids content, titratable acidity, and average fruit mass, even at doses high as 400 mg•L -1 . Carra et al (2017a) reported the same behavior for 'Smith' pear trees, in which fruit quality and yield were not influenced by the use of PCa, even with reapplication of the doses. However, Carra et al (2017b) observed that 'Shinseiki' pear trees were influenced by the application of PCa, in which the fruit yield decreased in the trees treated with 600 mg•L -1 PCa, whereas the dose of 300 mg•L -1 has not differed from the control; the quality parameters of the pears were not influenced by the PCa dose.…”

Section: Experiments With 'Packham's Triumph' Pearsmentioning

confidence: 54%

“…Considering the relative growth, each PCa dose had a better performance than the control; higher doses yielded lower relative growths. Carra et al (2017a), who evaluated the application of PCa in 'Smith' pear trees at the doses of zero, 100, 200, 300, and 400 mg•L -1 , reported a linear inverse trend between the PCa dose and the length of the plant branches. Pasa and Einhorn (2017) also reported a reduction of average branch length for 'Starkrimson' pear trees, from 55.1 cm in the control to 38.9 cm in trees treated with 250 mg•L -1 PCa.…”

Section: Experiments With 'Packham's Triumph' Pearsmentioning

confidence: 99%

“…PCa is an inhibitor of the synthesis of gibberellins, which are phytohormones that are essential to promote the growth of vegetative buds. With the inhibition of the vegetative growth, the reproductive buds are stimulated to grow more vigorously (Giannakoula et al, 2012;Carra et al, 2017a).…”

Section: Introductionmentioning

confidence: 99%

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Effect of the application of prohexadione-calcium on the growth of ‘Packham’s Triumph’ and ‘Hosui’ pears (Pyrus communis L.)

Dalzochio

Silvestre

Pauletti

2021

RSD

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The necessity of controlling the vegetative growth of fruit trees is a growing concern for farmers since vigorous plants tend to have lower fruit yields. The use of chemicals that inhibit the vegetative growth of plants, such as prohexadione-calcium (PCa), an inhibitor of gibberellins which is currently used as a growth regulator for apple trees, is an agricultural practice aimed to help in reducing pruning time and cost. Pear trees grafted on vigorous rootstocks tend to present high rates of vegetative growth, hindering fruit production. Thus, this work aimed to evaluate the effect of the application of different doses of the plant growth regulator PCa on the vegetative growth, pruning time, radiation incidence, and productive and quality parameters of ‘Packham’s Triumph’ and ‘Hosui’ pears grafted on vigorous rootstocks. Two PCa applications were carried out, the first after the falling of petals (2009-10-10), and the second twenty-one days after the first (2009-11-02). The observed results showed a significant effect of PCa in reducing the vegetative growth of the pear trees and the pruning time in both cultivars. The effect on photosynthetic active radiation (PAR) was observed only in the ‘Packham’s Triumph’ variety, not being observed for the ‘Hosui’ pear trees. No statistical difference was observed relative to the quality parameters and yield of the fruits, in both cultivars, showing that PCa application has not caused any deleterious effect on fruit development.

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Section: Experiments With 'Packham's Triumph' Pearsmentioning

confidence: 54%

Section: Experiments With 'Packham's Triumph' Pearsmentioning

confidence: 99%

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Effect of the application of prohexadione-calcium on the growth of ‘Packham’s Triumph’ and ‘Hosui’ pears (Pyrus communis L.)

Dalzochio

Silvestre

Pauletti

2021

RSD

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“…In the both years application concentrations on pH had no difference from control (Table 2). In the 'Smith' pear, Pro-Ca had no effect on SSC, TA, pH and firmness (Carra et al, 2017). Moreover, Çetinbaş et al (2015) reported that in 'Starkrimson' apple, Pro-Ca had no negative or positive effect on these fruit quality.…”

Section: Yield and Fruit Qualitymentioning

confidence: 98%

“…In 2018, it was determined that the angle increases with the Pro-Ca concentrations increase as well, and the widest angle was in the use of 250 g 100 L -1 (Figure 1D). Studies regarding the Pro-Ca were generally carried out to bring under control the vegetative development of the species such as apples (Schupp et al, 2003;Karlovic et al, 2004;Greene, 2008;Duyvelshoff and Cline, 2013;Çetinbaş et al / HortiS (2021) 38(2 (Elfving et al, 2003;Sugar et al, 2004;Einhorn et al, 2014;Carra et al, 2017;Kaur et al, 2020), and vegetables (Kofidis et al, 2008;Özbay and Ergun, 2015;Başak, 2020), and also to partially downgrade the growth. However, no studies have been made for peach species, and in a study carried out it is observed that no data has been indicated.…”

Section: Vegetative Growthmentioning

confidence: 99%

Effects of Prohexadione-Calcium on ‘Monroe/GF 677’ Peach Vegetative Shoot Growth, Fruit Yield and Quality

Çetinbaş¹,

Sarisu²,

Butar³

2021

Horticultural Studies

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Prohexadione-calcium (Pro-Ca) is a recently developed plant growth retardant used in some fruit trees. However, it is important that the reduction of vegetative shoot growth does not decrease yield and fruit quality. In this study, the effects of Pro-Ca applications on the vegetative growth and some fruit quality of the Monroe peach, growing on vigor rootstock (GF 677) were investigated. For this reason, trees were sprayed twice with 0 (water + surfactant), 62.5, 125, 250 g 100 L -1 water Pro-Ca in the annual shoots reached 5 cm within a three week interval in the spring of 2018 and 2019 years. Shoot length was decreased by 28-32% for shoots treated with Pro-Ca. The average internode length was significantly reduced for Pro-Ca-treated shoots. The lowest average internode length on the shoot was obtained with 125 and 250 g 100 L -1 . The effects on fruit quality were positive in this study. Application of Pro-Ca (125 and 250 g 100 L -1 ) increased the fruit size and fruit mass of cv. Monroe' peach. 250 g 100 L -1 Pro-Ca concentration led to firmer fruit relative to the other applications and control fruits. Two application 125 or 250 g 100 L -1 Pro-Ca applications were found more effective considering the criteria investigated. The Pro-Ca applications were found to be effective in controlling the vegetative shoot growth and fruit quality in cv. Monroe/GF-677 peach.

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Relationship between variable doses of N, P, K and Ca and the physicochemical and proximal characteristics of andean blackberry (Rubus glaucus Benth.)

Cárdenas

Cardona

Muñoz

et al. 2019

Scientia Horticulturae

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Prohexadione calcium reduces vegetative growth and increases fruit set of ‘Smith’ pear trees, in Southern Brazil

Cited by 13 publications

References 21 publications

Effect of the application of prohexadione-calcium on the growth of ‘Packham’s Triumph’ and ‘Hosui’ pears (Pyrus communis L.)

Effect of the application of prohexadione-calcium on the growth of ‘Packham’s Triumph’ and ‘Hosui’ pears (Pyrus communis L.)

Effects of Prohexadione-Calcium on ‘Monroe/GF 677’ Peach Vegetative Shoot Growth, Fruit Yield and Quality

Relationship between variable doses of N, P, K and Ca and the physicochemical and proximal characteristics of andean blackberry (Rubus glaucus Benth.)

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