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Effect of Paclobutrazol on Bearing Habit, Harvesting Time, Yield and Quality of Mango (bari Aam-1) at Off-year of Fruiting

Babul C. Sarker
Principal Scientific Officer
Pomology Division, HRC, BARI, Gazipur 1701

H. Rahman
Scientific Officer
Regional Agricultural Research Station, Jamalpur

M. A. Haque
Scientific Officer
Regional Agricultural Research Station, Jamalpur

Anwara Akter
Scientific Officer
Regional Agricultural Research Station, Jamalpur

Abstract/ Executive Summary:

An experiment was carried out to manipulate the alternate bearing habit, harvesting time, increasing yield and quality of mango (BARI Aam-1) under off-year of fruiting at RARS, Jamalpur during the fruiting season of 2011-2012. Paclobutrazol at 1500, 4500, 7500 ppm and control (water application) were included in the study as treatments. Soil drenching of plants with paclobutrazol at 7500 ppm noted the highest number of panicles/terminal shoot (4.00), fruit retention (1.30) and fruits/plant (215), whereas control plants exhibited the lowest number of panicles/terminal shoot, fruit retention and fruits/plant (1, 0.40 and 5, respectively). Paclobutrazol at 7500 ppm showed the heaviest fruit (203.12 g). Paclobutrazol at 4500 ppm showed the highest fruit breadth (6.84 cm) compared to control (6.55cm). Stone weight (37.509), shelf life (8 days) and TSS (17.50%) were recorded the highest in paclobutrazol at 7500 ppm as against minimum values (33.22, 7 days and 16.17% respectively) in control. Soil drenching of paclobutrazol at 7500 ppm gave the highest yield (42.97 kg/plant), whereas control gave the least yield (0.87 kg/plant)

Keywords: Mango, Pruning, Paclobutrazol, Soil drenching, Flower regulate

Location: Regional Agricultural Research Station, Jamalpur

Start Date: 00-00-2011

End Date: 00-00-2012

Program Area: Crop-Soil-Water Management

Commodity: Mango

Objectives:

To manipulate the alternate bearing habit, reducing harvesting time, increasing yield and quality of mango cv. BARI Aam-1 through paclobutrazol.
To regulate flowering and fruiting and also increase the yield and quality of mango cv. BARI Aam-1 by the use of paclobutrazol.
To find out the appropriate doses of paclobutrazol on flowering, yield and good quality fruits of mango cv. BARI Aam-1.

Methodology:

The experiment was carried out at the HRC Fruit Farm, RARS, Jamalpur during the fruiting season of 2011-2012 at off-year of fruiting. The 11 years old BARI Aam-1 plants with a plant spacing of 8x8 m were used in the study. The experiment was laid out in a Randomized Complete Block Design with 3 replications. Paclobutrazol at 1500, 4500, 7500 ppm and control (water application) were included in the study as treatments. The solutions of 1500, 4500, 7500 ppm were prepared by dissolving 6, 18 and 30 ml of 25 % paclobutrazol (Syngenta Chem. Co. Ltd., India) into 1 litre of fresh water each respectively. Paclobutrazol treatments were soil drenched according to Burondkar & Gunjate (1993), in which 10 small holes (10–15 cm depth) were prepared in the soil around the collar region of the plants just inside the fertilizer ring. The prepared solutions of paclobutrazol as per treatment uniformly drenched into the wholes on 15 July 2010 and the soil was reworked after application of paclobutrazol. Only water was applied in the control plants. The data of the following parameters were recorded: length of terminal shoot, number of leaves per terminal shoot, leaf area, number of panicles per terminal shoot, length and breadth of panicle, total number of panicles per plant, number of fruits retained per panicle at 10 day intervals starting from pea stage upto harvest, date of harvest, number of fruits per plant, fruit weight, fruit length, breadth and thickness, stone and skin weight, yield per plant, shelf life and TSS. The recorded data on different parameters of the experiment were tabulated and analyzed and the treatment means were separated by LSD test at 5 % level of significance.

Source of Information: Research Report on Horticultural Crops 2012-13. Horticulture Research Centre, Bangladesh Agricultural Research Institute, Gazipur-1701.

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 22000/-

Total Budget (Tk.) : 22000/-

Achievement/Findings:

Irrespective of concentration paclobutrazol showed superior performance over control at off-year of fruiting. Plants treated with paclobutrazol at 7500 ppm exhibited the highest fruit set, fruit retention, fruits per plant, single fruit weight, yield and TSS.

Knowledge Management: Report/Proceedings