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Effect of Pruning of Malformed Flowers 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, Bangladesh Agricultural University, Mymensingh-2202

Abstract/ Executive Summary:

An experiment was carried out for controlling malformation through pruning of flowers 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 2002. The treatments were pruning of all lateral malformed flowers + 25% terminal malformed flowers (T₁), pruning of all terminal malformed flowers (T₂), pruning of all terminal + 50 % lateral malformed flowers (T₃), pruning of only 50 % lateral malformed flowers (T₄), pruning of only 25 % lateral malformed flowers (T₅), pruning of all terminal + 25% lateral malformed flowers (T₆), control (no pruning) T₇. The experiment was conducted in randomized complete block design (RCBD) with 3 replications. Deblossoming at bud burst stage resulted in lower malformation and higher yield. The highest (10%) fruit retention per plant was found in T₁ and the lowest (4%) was recorded from control (T₇) at 60 DAFS.The highest (8.99 t/ha) yield was obtained from T₁ and the lowest (3.61 t/ha) was obtained from T₇ (control).

Keywords: Mango, Pruning, Malformation, Yield

Location: Germplasm Centre (GPC), FTIP, Department of Horticulture, BAU, Mymensingh

Start Date: 00-07-2001

End Date: 00-07-2002

Program Area: Variety and Species

Commodity: Mango

Objectives:

1. To develop a technology for controlling mango malformation; to increase the yield and quality mango per unit area of land and to reduce the cost of production.

Methodology:

The investigation was carried out from July 2001 - July 2002 at the Germplasm Centre (GPC), FTIP, Department of Horticulture, BAU, Mymensingh. The experiment taking amrapli as the test crop was conducted in randomized complete block design (RCBD) with 3 replications. The treatments were pruning of all lateral malformed flowers + 25% terminal malformed flowers (T₁), pruning of all terminal malformed flowers (T₂), pruning of all terminal + 50 % lateral malformed flowers (T₃), pruning of only 50 % lateral malformed flowers (T₄), pruning of only 25 % lateral malformed flowers (T₅), pruning of all terminal + 25% lateral malformed flowers (T₆) and control ( T₇: no pruning). Each treatment was considered ten malformed inflorescence. Malformed flowers were removed after panicle initiation but before fruit set. Plants, which were severely affected by floral malformation in previous season, were selected for the treatment. Only malformed flowers were pruned mechanically by hand. The recorded parameters were fruit retention per inflorescence; pre-mature fruits drop per inflorescence; fruit retention per plant (%) ; pre-mature fruits drop per plant; fruit weight; fruit size (cm); yield/plant; yield (t/ha) andtotal Soluble Solids (TSS). Spacing was 2.5m x 2.5m. The benefit-cost ratio (BCR) analysis was done using the following formula: BCR= Gross return/Total cost of production.

Source of Information: J. Agrofor. Environ. 4 (1): 109-111, 2010; ISSN 1995-6983

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Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Deblossoming at bud burst stage resulted in lower malformation and higher yield. The highest (10%) fruit retention per plant was found in T₁( pruning of all lateral malformed flowers + 25% terminal malformed flowers) and the lowest (4%) was recorded from control T₇ (control - no pruning) at 60 DAFS.The highest (8.99 t/ha) yield was obtained from T₁ and the lowest (3.61 t/ha) was obtained from T₇ (control).

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