Effect of Paclobutrazol Concentrations and Foliar Application Times on Flowering of ‘Mahachanok’ Mango

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Yaowarat Wongsrisakulkaew
Unaroj Boonprakob
Lop Phavaphutanon


Paclobutrazol (PBZ) is a growth regulator that has been widely used to stimulate mango flowering by soil drenching. This study aimed to investigate the suitable concentration of PBZ and the number of application times that can induce flowering by foliar application. The experimental design was Completely Randomized Design (CRD) with 10 treatments and 4 replications. ‘Mahachanok’ mango trees were used in this study. They received two and three PBZ foliar applications, applied at 15 days after pruning (DAP) with 1,000 2,000, 3,000 and 4,000 mg/L and repeated with PBZ 2,000 mg/L for the second time and third time at 30 and 45 DAP comparing to 2,000 mg/L of PBZ at 30 DAP and non-PBZ application as the control treatment. The results showed that PBZ foliar application stimulated earlier flowering and a higher percentage of flowering shoots than the control. The earliest flowering was presented when they got 1,000 mg/L at 15 days and repeated at 30 days with 2,000 mg/L of PBZ, flowered within 106.5 DAP and 72.5 % of new shoots flowering. Moreover, the length of mango panicles with PBZ treatments was significantly shorter than that of the control treatment. PBZ doses and the number of application times caused phytotoxic symptoms in vegetative shoots and inflorescences. However, there were found phytotoxic symptoms of shoots and panicles on the PBZ treatments at the rate of 2,000 mg/L and above, at the first foliar application (15 DAP). The phytotoxic symptoms on shoots and panicles occurred after mango trees received foliar application at 15 and 90 days, respectively.


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Wongsrisakulkaew Y, Boonprakob U, Phavaphutanon L. Effect of Paclobutrazol Concentrations and Foliar Application Times on Flowering of ‘Mahachanok’ Mango. J Appl Res Sci Tech [Internet]. 2022 Dec. 26 [cited 2023 Dec. 10];21(2):137-46. Available from: https://ph01.tci-thaijo.org/index.php/rmutt-journal/article/view/248603
Research Articles


Ramírez F, Davenport TL. Mango (Mangifera indica L.) flowering physiology. Sci Hortic. 2010;126(2):65-72.

Tiwari DK, Patel VB, Pandey K. Floral induction in mango: physiological, biochemical and molecular basis. Int J Chem Studies. 2018;6


Davenport TL. Reproductive physiology of mango. Braz J Plant Physiol. 2007;19:363-76.

Zhu LH, Peppel A, Li XY, Welander M. Changes of leaf water potential and endogenous cytokinins in young apple trees treated with or without paclobutrazol under drought conditions. Sci Hortic. 2004;99:133-41.

Phadung P, Krisanapook K, Phavaphutanon L. Paclobutrazol, water stress and nitrogen induced flowering in ‘Khao Nam Phueng’ pummelo. Kasetsart J (Nat Sci). 2011;45(2):189-200.

Arzani K, Roosta HR. Effects of paclobutrazol on vegetative and reproductive growth and leaf mineral content of mature apricot (Prunus armeniaca L.) trees. J Agric Sci Technol. 2004;6:43–55.

Wongsrisakulkaew Y, Boonprakob B, Sethpakdee R, Juntawong N. Effect of paclobutrazol concentrations and time of foliar application on flowering of ‘Namdokmai-Sitong’ mango. Int J GEOMATE. 2017;12(30):23-7.

Yeshitela T, Robbertse PJ, Stassen PJC. Paclobutrazol suppressed vegetative growth and improved yield as well as fruit quality of ‘Tommy Atkins’ mango (Mangifera indica) in Ethiopia. N Z J Crop Hortic Sci. 2004;32:281–93.

Singh DK, Ram S. Level of paclobutrazol residues in shoot and fruit of mango. Indian J Plant Physiol. 2000;5:186-8.

Yadava RBR, Singh VK. Long term effects of paclobutrazol (PP 333) on yield and quality of Dashehari mango (Mangifera indica L.). Indian J Plant Physiol. 1998;3(2):166–7.

Singh Z. Effect of (2RS, 3RS) paclobutrazol on tree vigour, flowering, fruit set and yield in mango. Acta Hortic. 2000;525:459-62.

Sharma D, Mahesh DA. Uptake of soil applied paclobutrazol in mango (Mangifera indica L.) and its persistence in fruit and soil. Chemosophere. 2005;60:164-9.

Davenport TL. Pruning strategies to maximize tropical mango production from the time of planting to restoration of old orchards. HortScience. 2006;41(3):544-8.

Taiz L, Zeiger E. Fisiologia vegetal. 5 ed. Porto Alegre: Artmed; 2012.

Srivastava LM. Plant growth and development: hormones and the environment. New York: Academic Press; 2002.

Kumar A, Ram S, Singh CP. Application methods of paclobutrazol in mango Cvs & Its residual effect in leaf, fruit and orchard soil. Int J res agric for. 2020;7(2):24-39.

Sterrett JP. Paclobutrazol: A promising growth inhibitor for injection into woody plants. J Am Soc Hortic Sci. 1985;110(1):4-8.

Silva GJ, Souza NEM, Rodrigues JD, Ono EO, Mouco MAC. Uniconazole on mango floral induction cultivar ‘Kent’ at submediosaofrancisco region, Brazil. Acta Hortic. 2010;884:677-82.

Yamashita K, Kitazono K, Iwasaki S. Flower bud differentiation of Satsuma Mandarin as promoted by soil-drenching treatment with IAA, BA or paclobutrazol solution. J Jpn Soc Hortic Sci. 1997;66(1):67-76.

Souza MA, Mésquita AC, Simões WL, Ferreira KM, Araujo FJ. Physiological and biochemical characterization of mango tree with paclobutrazol application via irrigation. Pesq Agropec Trop. 2016;46(4):442-9.

Oliveira GP, Siqueira DL, Salomao LCC, Cecon PR, Machado DLM. Paclobutrazol and branch tip pruning on the flowering induction and quality of mango tree fruits. Pesq Agropec Trop. 2017;47(1):7-14.

Parnsakhorn S, Langkapin J, Phriknunchan S, Srichumpol A. Effect of osmotic solution concentration on mass transfer and quality of melon after osmosis. JARST. 2020;19(2):132-43.

Tongumpai P, Jutamanee K, Subhadarshanbandhu S. Effect of paclobutrazol on flowering of mango cv. Khiew Sawoey. Acta Hortic. 1991;291:67-70.

Hunter DM, Proctor JTA. Paclobutrazol bioassay using the axillary growth of a grape shoot. Hort Science. 1990;25:309-10.