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STUDIES ON STANDARDIZATION OF DYE CONCENTRATION, STAGE OF HARVEST FOR TINTING AND POST HARVEST KEEPING QUALITY OF TUBEROSE (cv. SUVASINI) AND GLADIOLUS (cv. WHITE PROSPERITY)

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Title STUDIES ON STANDARDIZATION OF DYE CONCENTRATION, STAGE OF HARVEST FOR TINTING AND POST HARVEST KEEPING QUALITY OF TUBEROSE (cv. SUVASINI) AND GLADIOLUS (cv. WHITE PROSPERITY)
 
Creator B. SRAVAN KUMAR
 
Contributor Dr. P. LALITHA KAMESWARI
 
Subject standardization of dye concentration, stage of harvest for tinting and post harvest keeping quality
 
Description The present investigation entitled “Studies on standardization of dye concentration, stage of harvest for tinting and post harvest keeping quality of Tuberose (cv.Suvasini) and Gladiolus (cv.White Prosperity) ” was carried out in the laboratory of Floricultural Research Station, A.R.I, Rajendranagar, Hyderabad during year 2013-14. A total set of four experiments were carried out, two in each crop in order to standardize the dye concentration, time of immersion for tinting and to optimize the stage of harvest for tinting in Tuberose cv. Suvasini and Gladiolus cv.White Prosperity. To standardise the dye concentration and time of immersion the parameters considered were colour obtained at 30 minutes interval after placing the spike in dye solution (by RHS colour chart), dye uptake at 30 minutes interval, percentage bud opening at the end of vase life, percentage increase in fresh weight (at the end of immersion) and floret size (cm). To optimize the stage of harvest for tinting, the parameters like days for opening of florets (25%,50% and 75%), floret size(cm), vase life(days), percentage of wilting of flowers on the day of tinting, percentage of wilting of flowers after first day of tinting and percentage of wilting
of flowers at the end of vase life were taken into account. For vase life studies, colour of the spike after placing in the vase solution (with RHS colour chart), colour retained after one day, time taken for the flowers to fully loose the colour, water uptake, loss of water, ratio of water loss to water uptake,diameter of florets(cm), lipid peroxidase activity in tinted flowers and protein content in tinted flowers were taken in to consideration. The experiment on standardization of dye concentration and time of immersion were carried out in a Factorial completely randomised block design with two factors as food dyes and hours of immersion. In both the crops of Tuberose (cv. Suvasini) and Gladiolus (cv.White Prosperity), 5% concentration of food dye with two hours of immersion showed a best colour shades with out edging at petals, with maximum bud opening percentage and the highest mean floret size. The experiment on optimization of stage of harvest was also carried out in a factorial completely randomised block design with food dyes and stages of harvest as two factors. In Tuberose cv.Suvasini, flower spikes harvested at stage 2(1-2 basal florets open) had a higher vase life of 8.01 days, least wilting percentage of 24.08, 34.55, and 43.24 on fifth, sixth and seventh day respectively, highest mean water uptake of 59.42 g.spike-1, lowest mean transpirational loss of 48.55 g.spike-1, lowest mean ratio of water loss to water uptake of 0.89, highest mean diameter of florets of 3.65 cm, least decrease of 14.97g/100g mean percentage of lipids and least decrease of 15.18 g/100g mean percentage of proteins. More benefit cost ratio of 1.83 was observed in the spikes tinted with Lemon yellow, Violet and Orange red followed by Kesar yellow, Kalakatta, Blue and Apple green (1.74). In Gladiolus cv.White Prosperity, the spikes harvested at stage 1(1-2 basal florets show colour) had a higher vase life of 8.16 days, least wilting percentage of 0, 5.46, and 30.01% on fourth fifth and sixth day respectively, maximum time of 8.56 days to fully loose colour, lowest mean transpirational loss of 29.17 g. spike-1, highest mean diameter of florets of 9.21 cm, least decrease of 4.52 g/100g mean percentage of lipids and least decrease of 12.59 g/100g mean percentage of proteins. Benefit cost ratio of tinting the spikes with Lemon yellow, Violet and Orange red was 1.34 while with Kesar yellow, Kalakatta, Blue and Apple green it was 1.29.
Thus it can be concluded that for tinting the spikes of tuberose cv.Suvasini, the optimum stage of harvest is stage 2(1-2 basal florets open) where as in gladiolus cv.White Prosperity, stage 1(1-2 basal florets show colour) was found to be optimum.
 
Date 2016-07-26T11:02:18Z
2016-07-26T11:02:18Z
2014-05
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/69872
 
Language en
 
Format application/pdf
 
Publisher Dr. Y.S.R. HORTICULTURAL UNIVERSITY