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Effect of Deblossoming on the Yield, Quality and Control of Floral Malformation of Mango

M.N.A. Chowdhury
Spices Research Sub-Centre, BARI, Faridpur

M. A. Rahim
Department of Horticulture, BAU, Mymensingh-2202

M. H. A. Khanam
AHZ Biotech Ltd., Padma Residential Area, Vadra, Rajshahi

Abstract/ Executive Summary:

An experiment was conducted to control the floral malformation and achieving higher yield and quality of mango cv. Amrapali at the Germplasm Centre of the Fruit Tree Improvement Project (GPC-FTIP), Department of Horticulture, Bangladesh Agricultural University, Mymensingh during the period from July 2001 to July 2003. Five deblossoming treatments viz. T₁ = Last week of January (January 30), T₂ = 1st week of February (February 7), T₃ = 2nd week of February (February 14), T₄ = 3rd week of February (February 21), T₅ = Last week of February (February 28) and T₆ = Control were included in this study. The highest (6.15 tha^-1) yield was recorded from 2nd year and the lowest (5.50 tha^-1) yield was obtained from 1st year. Treatment T₁ resulted the highest (10.83%) percentage of fruit retention per plant at 60 days after fruit set and the lowest (6%) was found in control. The highest (8.66 tha-1) yield was recorded from T1 treatment and the lowest (3.66 tha-1) was obtained from untreated control (T₆). In 2nd year x T₁ produced the highest (8.73 tha^-1) yield and the lowest (2.71 tha^-1) was obtained from 1st year x T₆ treatment. The highest (2.41) BCR was found in T₁ treatment in 2nd year. It may be concluded that T₁ treatment might be considered as the best treatment in respect of fruit set, fruit retention per inflorescence, and per plant, total number and weight of fruit per plant, per hectare yield and also economics.

Keywords: Mango, Deblossoming, Malformation, Yield

Location: Germplasm Centre of the Fruit Tree Improvement Project (GPC-FTIP), Department of Horticulture, Bangladesh Agricultural University, Mymensingh

Start Date: 00-07-2001

End Date: 00-07-2003

Program Area: Variety and Species

Commodity: Mango

Objectives:

1. To study the effectiveness of deblossoming time to control floral malformation of mango.

Methodology:

The experiment was carried out during July 2001 to July 2003 at Germplasm Centre (GPC), FTIP, Department of Horticulture, BAU, Mymensingh. The single-factor experiment was conducted in randomized complete block design (RCBD) with 4 replications. Pooled analysis was done. The crop variety Amrapali was used in this experiment. The treatments were T₁ = Last week of January (January 30), T₂= 1st week of February (February 7), T₃ = 2nd week of February (February 14), T₄ = 3rd week of February (February 21), T₅ = Last week of February (February 28) and T₆ = Control. Deblossoming was done at bud burst stage. Plants, which were severely affected by floral malformation in previous season, were selected for the treatments. Only malformed buds were deblossomed by hand. Deblossoming was done in all malformed twigs except control. The plant spacing was 2.5m x 2.5m. Fertilizers were applied after harvest of the fruits. The recorded parameters were total number of inflorescences per plant; number of healthy inflorescences per plant; number of malformed inflorescence per plant; % healthy inflorescence per plant; % malformed inflorescence per plant; number of fruit retention per inflorescence; fruit retention per plant (%); fruit weight (g); yield/plant (Kg); yield (tha-1) and total Soluble Solids (TSS).

Source of Information: J. Agrofor. Environ. 4 (1): 67-70, 2010; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Different year x deblossoming treatment had no significant differences on the total soluble solids of mango. The highest (2.41) BCR was found in T₁ treatment in 2nd year and the lowest (0.77) BCR was obtained from control treatment in 1st year. The highest net return and BCR was obtained from T₁ treatment in 2nd year due to the highest fruit yield in this treatment. Among the treatments, treatment T₁resulted in the highest fruit set, fruit retention per inflorescence, and per plant. Total number and weight of fruit per plant, per hectare yield and BCR were highest in T₁ treatment as compared to control. From the above discussion, it may be concluded that treatment T₁ i.e. deblossoming on last week of January is effective in controlling malformation leading to maximum yield.

Knowledge Management: Journal