Paclobutrazol and branch tip pruning on the flowering induction and quality of mango tree fruits

Abstract

The 'Ubá' mango tree cultivar is very important for the juice industry in the "Zona da Mata" region of the Minas Gerais State, in Brazil, but problems such as uneven flowering and low yield have discouraged producers. This study aimed at evaluating the effect of paclobutrazol, combined with branch tip pruning, on the flowering induction and quality of 'Ubá' mango tree fruits. Treatments were distributed in a 5 x 2 + 1 factorial arrangement, consisting of five paclobutrazol doses (0 g, 0.50 g, 1.00 g, 1.50 g and 2.0 g per linear meter of canopy), with and without branch tip pruning, in a randomized blocks design, with four replicates. The flowering percentage, number of panicles per branch, total flowers per panicle, male/hermaphrodite flowers ratio, number of fruits per branch and fruit quality were evaluated. Plants treated with tip pruning showed a higher flowering percentage. There was an increase in the flowering percentage in response to the paclobutrazol dose, reaching a maximum level at the dose of 1.62 g per linear meter of canopy. Plants submitted to branch tip pruning had a higher number of panicles per branch. There was an increase in the male/hermaphrodite flowers ratio with increasing paclobutrazol doses. Branch tip pruning increased the number of fruits per branch. There were no differences in fruit quality in response to the paclobutrazol application. It was concluded that the paclobutrazol application at the dose of 1.62 g per linear meter of canopy, combined with branch tip pruning, increases the flowering of the 'Ubá' mango tree and does not change the fruit quality.

Paclobutrazol in the flowering management affects the quality of Malpighia emarginata fruits

“…In avocado (Persea americana), Brogio et al (2018) reported an increase of fruit mass and size; while, in 'Palmer' mango (Mangifera indica L.), Oliveira et al (2015) observed a reduction in the soluble solids content. Oliveira et al (2017), however, reported no effect of PBZ on the physical and chemical characteristics of 'Ubá' mango.…”

Modified Off–Season Technology to the Flowering Time and Fruit Yield of Arumanis Mango (Mangifera indica L.)

“…Moreover, it also increased Alphonso cultivar [4], Miska cultivar, Mohmoudi cultivar, Totocombo culviar [8] Lechi yield [9]. In Uba mango, paclobutrazol branch tip pruning also enhanched the flowering up to 30 % [10].…”

Uso do paclobutrazol na produção de manga

“…Cultivares que possuem intensa capacidade de vegetar necessitam de maiores doses (Albuquerque et al, 2002;Oliveira et al, 2017), como é o caso das cultivares Keitt, Kent e Ubá, e dentro da mesma variedade a sensibilidade vai depender da época de aplicação, idade e nutrição das plantas. Em geral, plantas mais jovens são mais sensíveis e respondem a menores doses de paclobutrazol do que as plantas mais velhas (Albuquerque e Mouco, 2000).…”

“…O uso de reguladores de crescimento é essencial para o sucesso da mangicultura no Brasil, uma vez que desempenham importante função na indução floral, permitindo o escalonamento da produção durante o ano todo e obtenção de frutos de boa qualidade e quantidades que atendam a demanda interna e externa. Nas regiões semiáridas, principalmente com as cultivares de consumo in natura como a Tommy Atkins e Palmer, para as quais foram definidas doses, época e forma de aplicação, como parte das tecnologias visando à indução floral (Albuquerque e Mouco, 2005;Mouco et al, 2010;Coelho et al,2014;Oliveira et al, 2015) e em cultivar destinada a indústria de suco também foi realizado com o intuito de uniformizar a floração e a colheita (Oliveira et al, 2017). Em 2019 o escalonamento da produção de manga foi eficaz na região mineira, evitando a concentração de colheita e, consequentemente, queda nos preços (Anuário, 2019).…”