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Effect of Bending and Fruit Thinning for Off-season Production of Guava

A.A. Mamun
Department of Horticulture, Bangladesh Agricultural University, Mymensingh

M.H. Rahman
Department of Horticulture, Bangladesh Agricultural University, Mymensingh

A.M. Farooque
Department of Horticulture, Bangladesh Agricultural University, Mymensingh

Abstract/ Executive Summary:

The study was carried out at the Germplasm Centre of Fruit Tree Improvement Programme (GPC-FTIP), Bangladesh Agricultural University, Mymensingh during the period from February, 2011 to March, 2012 to find out the effect of shoot bending and fruit thinning for off-season production of guava. The treatments of the experiment were four varieties of guava viz., Swarupkathi, BAU piyara-5, Chiang Mai (round) and Chiang Mai (long) and six different management practices viz., (i) control (no shoot bending + no fruit thinning); (ii) shoot bending; (iii) 25% fruit thinning; (iv) 50% fruit thinning; (v) 75% fruit thinning and (vi) 100% fruit thinning. The ages of the plants were 4-5 years. Results revealed that the variety Chiang Mai (round) showed superiority over BAU piyara-5, Chiang Mai (long) and Swarupkathi in respect of fruit yield (15.63 kg/plant), individual fruit weight (287.00 g), weight of seeded portion of fruit (85.79 g), weight of non-seeded portion of fruit (192.21 g) and TSS (12.40%) during on-season but during off-season, Swarupkathi showed superiority over Chiang Mai (round), BAU piyara-5 and Chiang Mai (long) in case of yield (11.78 kg/plant) and number of shoots per fruit (6.39). Different management practices had significant effect on all studied parameters in both season, 50% fruit thinning treatment showed the highest fruit yield (20.46 kg/plant) and 75% fruit thinning treatment performed height TSS (14.73%) during on-season but during off-season shoot bending performed highest fruit yield (13.50 kg/plant). In contrast, above studied parameters were recorded the lowest in control plant where no shoot bending and no fruit thinning were applied. In case of combined effect of variety and different management practices 50% fruit thinning treatment combined with Chiang Mai (round) produced highest yield (23.15 kg/plant) and 75% fruit thinning perform height TSS (15.83%) during on-season, but shoot bending treatment combined with Swarupkathi gave the highest yield (16.06 kg/plant) and 100% fruit thinning combined with Chiang Mai (round) showed highest TSS (17.94%) during off-season.

Keywords: Guava, Bending, Fruit thinning, Off-season production

Location: Germplasm Centre of Fruit Tree Improvement Programme (GPC-FTIP), Bangladesh Agricultural University, Mymensingh

Start Date: 00-02-2011

End Date: 00-03-2012

Program Area: Variety and Species

Commodity: Guava

Objectives:

1. To study the effect of bending and fruit thinning for off-season production of guava.

Methodology:

Shoot bending: The branches which were healthy and disease free lateral shoots were selected for shoot bending with care. Shoot bending was done in such a way that the bent branch did not broken down after bending. Shoots were bent at its antigrowth (at 90° angle) with the help of a piece of rope. Before shoot bending 3-5 leaves were kept at the upper portion of the branch to continue its photosynthesis and respiration process and rest leaves were removed off. Fruit thinning: Total number of fruits per plant in each replication was counted after fruit set. Out of these according to treatment fruits were thinned randomly by hand when the average weight of individual fruit was 15-20 g. According to the management practices, the experiment consists of two factors with three replications. These are following- Factor A: It consists of four varieties; i) V₁ = Swarupkathi, ii) V₂ = BAU piyara -5, iii) V₃ = Chiang Mai (round) and V₄= Chiang Mai (long). Factor B: six management practices; The data collections were done based on the following points- number of shoots/branch, individual fruit weight, weight of seeded portion of fruit, weight of non-seeded portion of fruit, yield (kg/plant) and total soluble solids (TSS). The collected data were analyzed by a statistical programme MSTAT-C following the appropriate design of the experiment. The means for all the treatments were calculated and the analysis of variance (ANOVA) for most of the characters under consideration were performed by the least significance difference (LSD) test taking the probability level 1% as the maximum unit of significance.

Source of Information: J. Agrofor. Environ. 6 (1): 111-116, 2012; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Results revealed that the variety Chiang Mai (round) showed superiority over BAU piyara-5, Chiang Mai (long) and Swarupkathi in respect of fruit yield (15.63 kg/plant), individual fruit weight (287.00 g), weight of seeded portion of fruit (85.79 g), weight of non-seeded portion of fruit (192.21 g) and TSS (12.40%) during on-season but during off-season, Swarupkathi showed superiority over Chiang Mai (round), BAU piyara-5 and Chiang Mai (long) in case of yield (11.78 kg/plant) and number of shoots per fruit (6.39). Different management practices had significant effect on all studied parameters in both season, 50% fruit thinning treatment showed the highest fruit yield (20.46 kg/plant) and 75% fruit thinning treatment performed height TSS (14.73%) during on-season but during off-season shoot bending performed highest fruit yield (13.50 kg/plant). In contrast, above studied parameters were recorded the lowest in control plant where no shoot bending and no fruit thinning were applied. In case of combined effect of variety and different management practices 50% fruit thinning treatment combined with Chiang Mai (round) produced highest yield (23.15 kg/plant) and 75% fruit thinning perform height TSS (15.83%) during on-season, but shoot bending treatment combined with Swarupkathi gave the highest yield (16.06 kg/plant) and 100% fruit thinning combined with Chiang Mai (round) showed highest TSS (17.94%) during off-season.

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