Gibberellic Acid Reduces Flowering and Time of Manual Thinning in ‘Maciel’ Peach Trees

Giovanaz, Marcos Antônio; Fachinello, José Carlos; Spagnol, Daniel; Weber, Diego; Carra, Bruno

doi:10.1590/0100-29452016692

Cited by 13 publications

(14 citation statements)

References 22 publications

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“…Possibly, the decrease in fruit diameter observed in the 2016 cycle with P increment is due to an increase in the number of fruits per plant, even with no significant difference between treatments. Thus, an inverse relationship between fruit diameter and the number of fruits could have occurred in plants, corroborating the data found by Giovanaz et al (2016). Thus, a higher number of fruits means more drains and higher competition for photoassimilates, causing the plant to produce fruits with smaller diameters and, consequently, lower mean weight.…”

Section: Resultssupporting

confidence: 85%

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Response of ‘Sensação’ peach trees to phosphate fertilization

Navroski

Barreto

Ferreira

et al. 2019

SCA

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Phosphorus is part of several organic compounds in plant metabolism such as nucleotides and phosphoproteins, in addition to participating in metabolism and energy storage. This study aimed to evaluate the response of peach trees cv. Sensação to phosphate fertilization and establish the critical level of this nutrient in soil and leaves. The experiment was conducted in the 2016 and 2017 cycles in a commercial orchard located in Morro Redondo, RS, Brazil. The experimental design was a randomized block design with four replications. Peach trees were fertilized with increasing doses of phosphorus (P) of 0, 20, 40, 60, and 80 kg ha −1 of P 2 O 5 as triple superphosphate. In the two evaluated cycles, samples of soil at a depth of 0-20 cm and leaves were collected to determine mineral contents. The data were submitted to analysis of variance by the F test (P<0.05), and when the effects were significant, regression equations were adjusted. P application increased the contents of this nutrient in the soil. Leaf P contents were not affected by fertilization, as well as productivity and yield components. Thus, the critical level of P in soil and peach leaves could not be established. In soils where P contents are classified as medium and high, there is no need to apply this nutrient.

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Section: Resultssupporting

confidence: 85%

“…In the fruit plants, thinning practice is indispensable to obtain an adequate production. Peach trees with high fruit loads lead to the production of small fruits with low commercial value, as well as the breaking of branches due to their weight (PEREIRA; GIOVANAZ et al, 2016). It can also promote an alternation of production.…”

Section: Resultsmentioning

confidence: 99%

Response of ‘Sensação’ peach trees to phosphate fertilization

Navroski

Barreto

Ferreira

et al. 2019

SCA

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“…UERGS, v.4, n.5, p. ,705-715, 2018. al., 2015GIOVANAZ et al, 2016). Nos Estados Unidos, o metamitron tem se destacado com o intuito de ser utilizado como ralente em macieira e pessegueiro (McARTNEY et al, 2012).…”

Section: Introductionunclassified

Concentração de metamitron no raleio de pessegueiros: influência sobre a qualidade dos frutos

Barreto

Farias

Martins

et al. 2018

R. Eletr. Cient. da Uergs

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O raleio manual de pessegueiros é uma prática necessária, mas onerosa e dificultosa para a produção de frutas. O uso de produtos com ação raleante é uma alternativa ao raleio manual, porém carece de informações sobre seu efeito na qualidade dos frutos. O objetivo do trabalho foi avaliar a qualidade dos frutos de pessegueiros após o raleio químico com o uso de diferentes doses de metamitron. O experimento foi conduzido em pomar comercial no município de Morro Redondo, Rio Grande do Sul, Brasil, durante as safras 2015 e 2016, na cultivar Maciel. Os tratamentos constituíram em plantas de pessegueiro sem raleio e o raleio químico com metamitron nas concentrações de 100, 200, 300 e 400 mg L-1. Foram avaliados a coloração da epiderme, firmeza da polpa, índice de maturação, sólidos solúveis, acidez titulável, compostos fenólicos totais e atividade antioxidante nos frutos de pessegueiros. A acidez titulável dos pêssegos aumenta com o incremento das doses de metamitron utilizado no raleio dos pessegueiros. O uso no metamitron no raleio reduz o teor de fenóis totais e atividade antioxidante dos pêssegos. Portanto, somente a acidez titulável e os compostos bioativos dos pêssegos são alterados pelo uso de distintas doses de metamitron no raleio de pessegueiro.

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“…Hence, the need for fruit thinning practices whose main objective is to better fruit quality and the secondary one is to avoid production alternation. Trees with high load of fruits usually bear little fruits with low commercial value, besides the fact that branches may break as the result of their weight (Pereira Giovanaz et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Chemical thinning is feasible for peach tree cultures, since it is a fast practice which uses different chemical substances, not only to better fruit quality but also to decrease costs and working time. Regarding peach trees, some products have been studied to thin their fruits (McArtney et al, 2012;Meitei et al, 2013;Giovanaz et al, 2014;Giovanaz et al, 2016). Metamitron, for instance, has become an alternative to managing peach tree thinning (McArtney et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Application time of chemical thinning with metamitron in ‘Sensação’ peach trees

et al. 2020

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Thinning is a cultural practice that leads to balance between fruit yield and quality. It is carried out in a short period of time and requires qualified workforce, whose shortage ends up increasing costs. This study aimed at evaluating the thinning effect of metamitron on peach trees at different periods of time after bloom. The experiment was carried out in a commercial orchard of 'Sensação' peach trees located in Morro Redondo, Rio Grande do Sul (RS) state, Brazil, in 2015-2016 crops. Treatments were the application of 200 mg L-1 metamitron, 20, 30, 40, 50 and 60 days after full bloom (DAFB), and manual thinning 40 DAFB. Fruit abscission, effective fructification, period of manual and chemical thinning, number of fruits and yield per plant, mean fruit mass and fruit caliber were evaluated. When metamitron was applied 40 DAFB, percentages of fruit abscission and fruit set, besides the number of fruits, were similar to the ones found when manual thinning was carried out. The intensity of the thinning effect of metamitron in peach trees depends on the application period.

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Gibberellic Acid Reduces Flowering and Time of Manual Thinning in ‘Maciel’ Peach Trees

Cited by 13 publications

References 22 publications

Response of ‘Sensação’ peach trees to phosphate fertilization

Response of ‘Sensação’ peach trees to phosphate fertilization

Concentração de metamitron no raleio de pessegueiros: influência sobre a qualidade dos frutos

Application time of chemical thinning with metamitron in ‘Sensação’ peach trees

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