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Effect of Foliar Application of Miyobi Hormone on Morphophysiological Attributes and Yields in Summer Tomato

M.H. Imam
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

.M.A. Mondal
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

A.K.M.A. Prodhan
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M.A. Malek
Plant Breeding Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

M.O. Islam
Department of Crop Botany, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

A pot experiment was conducted at the pot-yard of Bangladesh Institute of Nuclear Agriculture, Mymensingh, during the period from February to June 2010, to investigate the effect of foliar application of Miyobi hormone (0, 2, 4, 6 and 8 mg L^-1) on morphological, growth, reproductive and yield attributes, and yield in two summer tomato genotypes (BARI tomato-5 and TM-219). The experiment was laid out in a two-factor completely randomized design with eight replications. Miyobi solution sprayed on tomato plants at 30 days after transplanting (DAT), just before initiation of flowering. Results revealed that most of the morphological, growth, reproductive and yield attributes were increased with increasing concentration of Miyobi up to 6 mgL^-1 resulted the highest fruit yield followed by a decline. The genotypic variation existed in morphological, growth, reproductive and yield attributes with BARI tomato-5 was superior to TM-219. The combined effects of genotypes and Miyobi hormone on yield attributes and fruit yield were superior at 6 mgL^-1 in both the genotypes with magnitude was higher in BARI tomato-5 than in TM-219. Therefore, Miyobi at 6.0 mgL^-1 may be used at vegetative stage for getting maximum fruit yield in tomato.

Keywords: Tomato, Miyobi hormone, Fruit yield

Location: Bangladesh Institute of Nuclear Agriculture, Mymensingh

Start Date: 00-02-2010

End Date: 00-06-2010

Program Area: Crop-Soil-Water Management

Commodity: Tomato

Objectives:

1. To study the effect of Miyobi on growth, morphological features, yield attributes and yield in summer tomato under Bangladesh conditions.

Methodology:

A pot experiment was carried out at the pot-yard of Bangladesh Institute of Nuclear Agriculture, Mymensingh (24075? N and 90050? E), Bangladesh, during February to June 2010. The soil of the experiment was sandy loam having a total nitrogen 0.06%, organic matter 1.15%, available phosphorus 18.5 ppm, exchangeable potassium 0.28 meq%, sulphur 18 ppm and pH 6.8. The experiment comprised of five concentrations of Miyobi viz., 0, 2, 4, 6 and 8 mgL^-1 which were applied at 30 days after transplanting (DAT) i.e. just before flowering start phase. The spray was done by a hand sprayer at afternoon. Two tomato genotypes were selected, one was variety (BARI tomato-5) and another was advanced mutant (TM-219). The soil was thoroughly mixed with the given amounts of urea, triple superphosphate, muriate of potash, gypsum and cowdung at the rate of 3.70, 2.15, 1.30, 0.80 and 150 g pot^-1 corresponding to 300, 160, 140, 40 and 10000 kg ha^-1, respectively. Total amount of TSP, MP, gypsum and cowdung were applied as basal dose during soil preparation. Half of urea was applied as top dress at 21 DAT and rest half was applied at 45 DAT. The pots of the experiment were filled with 12 kg of soils. The experiment was laid out in two factors completely randomized design with 8 replications. Twenty five-day old seedlings were sown in each pot on 15 March 2010. The 5-8th replications were used for growth study. Intercultural operations like irrigation, weeding, mulching, pruning, staking, and pest control were followed as and when necessary for normal plant growth and development. Growth parameters such as total dry mass (TDM) plant^-1, absolute growth rate (AGR) and relative growth rate (RGR) were recorded at 40 and 60 DAT. Plant sample was oven dried at 80 0C ± 2 for 48 hours. The total dry matter plant^-1 was estimated by summing dry matter of leaves, stem, root and fruits dry weight per plant. AGR and RGR were determined. Other morphological, reproductive and yield attributes were recorded during tomato harvest. Per cent fruit set to flowers was calculated as follows: % fruit set = (Number of fruits plant^-1 ÷ Number of flowers plant^-1) × 100. Harvesting was done at different dates depending on fruit ripening. The collected data were analyzed statistically using the computer package programme, MSTAT-C and the mean differences were adjudged by Duncan’s Multiple Range Test (DMRT).

Source of Information: J. Agrofor. Environ. 4 (2): 197-200, 2010; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In conclusion, it can be said that foliar application of Miyobi at vegetative stage enhance plant growth and development which resulted increased fruit yield in tomato. Among the concentrations, 6mgL^-1 had superiority for plant growth, reproductive characters, yield component and yield over 2, 4 and 8 mgL^-1. Therefore, application of Miyobi @ 6mgL^-1 may be recommended for tomato cultivation after few more field trials.

Knowledge Management: Journal