EFFECT OF POST HARVEST TREATMENTS AND STORAGE STUDIES ON DIFFERENT VARIETIES OF SAPOTA (Manilkara achras (Mill.) Fosberg)
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Date
2015-06
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K.R.C. COLLEGE OF HORTICULTURE, ARABHAVI (UNIVERSITY OF HORTICULTURAL SCIENCES, BAGALKOT)
Abstract
An investigation was carried out in the Department of Post Harvest Technology, Kittur Rani Channamma College of Horticulture, Arabhavi, during the period from 2014 – 2015 to study the effect of post harvest treatments such as chitosan (1.5%), wax (6%), salicylic acid (0.01%), calcium nitrate (2.0%), Aloe vera gel (20%) and Trichoderma harzianum (10 g/l) on physico-chemical changes and shelf life of sapota cv. Kalipatti and to study the physico-chemical changes in different sapota varieties at ambient storage.
Among the seven post harvest treatments, 6 per cent wax coated fruits were superior in maintaining better physico-chemical and organoleptic qualities even upto 10 days of storage followed by 20 per cent Aloe vera gel, 2 per cent calcium nitrate and 0.01 per cent salicylic acid (9.67 days each). Further, Aloe vera gel and chitosan treated fruits showed least decay as compared to control fruits. Post harvest dipping of fruits in 6 per cent wax (T3), 20 per cent Aloe vera gel (T5), 2 per cent calcium nitrate (T4) and 0.01 per cent salicylic acid (T2) for 5 minute was found minimum physiological loss in weight and respiration rate and highest score for texture, taste, overall acceptability whereas control (T7) recorded lowest score for all organoleptic parameters. In our investigation the Trichoderma harzianum (UAS, Dharwad strain) not shown any significant effect on post harvest shelf life of sapota.
Among the 15 varieties evaluated, DHS-1, DHS-1 selection and CO-1 ranked first in maintaining quality and shelf life upto 10 days followed by Cricket Ball, DHS-2, PKM-3 and PKM-4 which had shelf life upto 8.5 days each whereas, Virudhunagar had comparatively shorter shelf life (6.00 days). Among the varieties, DHS-2, DHS-1 selection and CO-1 recorded maximum score with respect to organoleptic qualities whereas, Virudhunagar was found lowest score.
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TH521
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