Abscisic acid as a potential chemical thinner for peach

Giovanaz, Marcos Antônio; Spagnol, Daniel; Bartz, Josiane; Pasa, Mateus da Silveira; Chaves, Fábio Clasen; Fachinello, José Carlos

doi:10.1590/s0100-204x2015001000015

Cited by 7 publications

(6 citation statements)

References 14 publications

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“…In general, it was observed that metamitron application at the initial stages of fruit growth increases fruit abscission due to the fact that in these stages, lignin formation is still not present and fruits presented approximately 7 to 9 mm (20 DAFB) and 17 to 19 mm (30 DAFB) in diameter (Figure 1). According to Giovanaz et al (2015), chemical thinning performed during lignin formation may lead to greater reduction of fruit load, probably because these plants are consuming more energy at this stage to form the endocarp. The fact that metamitron contributed to higher fruit abscission at early stages was also observed for apple fruits (PETRI et al, 2016b;GABARDO et al, 2017b).…”

Section: Time Of Metamitron Applicationmentioning

confidence: 99%

Time of metamitron application and concentration in the chemical thinning of ‘Maciel’ peach

et al. 2019

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In the peach tree cultivation, the producer has the challenge of obtaining good quality fruits and maintaining production in a balanced way over the years. Thinning favors these parameters and reduces the fruit load on plants. Manual thinning commonly practiced on peach trees requires high labor and increases production costs. Chemical thinning as an alternative to manual thinning, which depending on the species, time and concentration, has demonstrated high efficiency. The aim of this study was to evaluate the effect of metamitron applied at different seasons and concentrations on the chemical thinning of peach trees in southern Brazil. Experiments were conducted in a commercial peach orchard (‘Maciel’ cultivar), in the municipality of Morro Redondo, Rio Grande do Sul, Brazil, during the 2015 and 2016 harvests. In experiment 1, metamitron at concentration of 200 mg L-1 was applied at 20, 30, 40, 50 and 60 days after full bloom and manual thinning performed at 40 days after full bloom. In experiment 2, metamitron was applied at concentrations of 100 mg L-1, 200 mg L-1, 300 mg L-1 and 400 mg L-1 and manual thinning at 40 days after full bloom, in addition to control plants. Fruit abscission, fruit set, total number of fruits per plant, yield per plant, average mass and fruit diameter were evaluated. Metamitron at concentration of 200 mg L-1 has thinning effect when applied before 40 days after full bloom. Metamitron concentration of 100 mg L-1 applied at 40 DAFB promoted fruit abscission superior to manual thinning. Therefore, the application of metamitron to ‘Maciel’ peach trees close to full bloom at concentration of 100 mg L-1 results in thinning practice similar to manual thinning.

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Section: Time Of Metamitron Applicationmentioning

confidence: 99%

Time of metamitron application and concentration in the chemical thinning of ‘Maciel’ peach

et al. 2019

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“…Chemical thinning is a viable alternative for peach tree cultivation because it is a quick practice, through the use of different products, allowing the fruits quality increase and reducing the labor cost and time. It has been studied some products in peach trees with the purpose of fruits thinning [1,5,6], among them, the metamitrom has been presented as an efficient insertion alternative in peach blossom management [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Chemical Thinning Season Using Metamitron on Peaches ‘Sensação’ Quality

Farias

Barreto

Schiavon

et al. 2018

JEAI

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“…This behavior may be a strategy to maintain the fruit, considering trees use a large amount of carbohydrates to develop and to form lignin to harden their stones, as shown by the results presented in Table 2. Chemical thinning during lignin formation may lead to a decrease in fruit load since trees consume more energy in this stage to form the endocarp (Giovanaz et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Carbohydrate content in branches and abscission of fruit of peach trees subjected to chemical thinning

Barreto

Farias

Menegatti

et al. 2021

Pesq. agropec. bras.

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The objective of this work was to evaluate the effect of chemical thinning with metamitron on fruit of the Maciel and Sensação peach (Prunus persica) tree cultivars, as well as to identify its relation to the carbohydrate content in their branches. The experimental design was randomized complete blocks, and the treatments were trees with no thinning, manual fruit thinning, and chemical thinning with 200 mg L-1 metamitron applied at 20, 40, and 60 days after full blooming. The evaluated variables were: abscission percentage, yield per plant, number of fruit, presence of lignin in fruit, and carbohydrate content in the branches. The carbohydrate content was evaluated in trees with and without chemical thinning seven days after the application of the product. The use of metamitron promotes fruit thinning in the ‘Maciel’ and ‘Sensação’ peach trees, with a decrease in the carbohydrate content in their branches. Metamitron application 20 and 40 days after full blooming favors fruit abscission in both studied cultivars.

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Abscisic acid as a potential chemical thinner for peach

Cited by 7 publications

References 14 publications

Time of metamitron application and concentration in the chemical thinning of ‘Maciel’ peach

Time of metamitron application and concentration in the chemical thinning of ‘Maciel’ peach

Effect of Chemical Thinning Season Using Metamitron on Peaches ‘Sensação’ Quality

Carbohydrate content in branches and abscission of fruit of peach trees subjected to chemical thinning

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