STUDIES ON ZEOLITE-LDPE COMPOSITE BAGS TO EXTEND SHELF LIFE OF BANANA AND SAPOTA FRUITS
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Date
2019-07
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University of Horticultural Sciences, Bagalkot
Abstract
An experiment entitled “studies on zeolite-LDPE composite bags to extend shelf
life of banana and sapota fruits was conducted in the Department of Post-harvest
Technology, College of Horticulture, University of Horticultural Sciences, Bagalkot
during the year 2018-19.
In this experiment, seven packaging treatments (T1-Silver-zeolite-LDPE
composite bag, T2-Zeolite-LDPE composite bag, T3-Chlorine-zeolite-LDPE composite
bag, T4-Silver-zeolite-LDPE composite bag + CFB, T5-Zeolite-LDPE composite bag +
CFB, T6-Chlorine-zeolite-LDPE composite bag + CFB and T7-Only CFB) were
compared with control (T8) to know their efficacy in extending shelf life of banana and
sapota fruits under ambient and refrigerated (13°C) conditions. Under ambient
conditions, bananas packed in T6 showed significantly minimum TSS/acid ratio
(55.68), physiological loss in weight (PLW) (4.31%), disease score (41.03%) and
maximum titratable acidity (0.38%) and shelf-life (6.00 days). But, banana fruits did not
show significant differences regarding, TSS (°B), firmness (N), respiration rate (ml
CO2/Kg/hr), pulp to peel ratio, instrumental colour values (L*, a*, b*) and sensory
scores among the treatments during storage of 6 days. While under refrigerated
condition bananas packed in T6 showed significantly minimum TSS/acid ratio (52.07),
respiration rate (156.1 ml CO2/Kg/hr), physiological loss in weight (PLW) (12.91%),
instrumental colour values L* (83.1), a* (-7.2), b*(59.4), disease score (22.91%) and
maximum titratable acidity (0.42%), firmness (6.12 N), shelf-life (18.00 days) and
sensory scores. But, did not show significant differences regarding, TSS (°B) and pulp
to peel ratio among the treatments during storage of 21 days.
Under ambient conditions, sapotas packed in T6 showed significantly minimum
TSS/acid ratio (65.94), physiological loss in weight (PLW) (11.15%), disease score
(28.14%) and maximum titratable acidity (0.38%) and shelf-life (4.66 days). But, sapota
fruits did not show significant differences regarding, TSS (°B), firmness (N),
respiration rate (ml CO2/Kg/hr), instrumental colour values (L*, chroma and hueangle)
and sensory scores among the treatments during storage of 6 days. While
under refrigerated condition sapotas packed in T6 showed significantly minimum
TSS/acid ratio (58.83), respiration rate (164.1ml CO2/Kg/hr), physiological loss in
weight (PLW) (12.05%), instrumental colour values L* (45.6), chroma (27.8), hueangle
(39.1), disease score (24.29 %) and maximum titratable acidity (0.42%), firmness
(5.91 N), shelf-life (17.66 days) and sensory scores. But, did not show significant
differences regarding, TSS (°B) among the treatments during storage of 21 days.
Zeolite-LDPE composite bags with or without CFB boxes were not found to be
economically viable to extend shelf-life of fruits under prevailing ambient conditions
during the course of study. But, under refrigerated condition, the treatment T6 yielded an
additional shelf-life of 6 days and 8 days over control in banana and sapota respectively.