Dr.N.N.REDDYTADURI MOUNIKA2019-09-112019-09-112016-07-11Sri Konda Laxman Telangana State Horticultural University, Rajendranagar, Hyderabadhttp://krishikosh.egranth.ac.in/handle/1/5810127308A total set of 3 experiments were conducted to study the performance of pre harvest treatments (Experiment-I), packaging materials (Experiment-II) and post harvest chemical treatments (Experiments-III) on shelf life and quality of mango Cv. Amrapali.The present investigation entitled “Studies on the effect of pre & post harvest treatments and packaging materials on shelf life and quality of mango (Mangifera indica L.) Cv. Amrapali” was carried out in CRIDA, Santhosh Nagar, Hyderabad during the year 2015. A total set of 3 experiments were conducted to study the performance of pre harvest treatments (Experiment-I), packaging materials (Experiment-II) and post harvest chemical treatments (Experiments-III) on shelf life and quality of mango Cv. Amrapali. The 1st experiment was imposed with 13 treatments of CaCl2 sprays with 0.5, 1, 1.5% and GA3 sprays 25, 50, 75ppm, control at 20,10days before harvest (DBH) in RBD design. In the present study, among all the treatments, (T6) GA375ppm spray at 20 DBH recorded significantly maximum number of days taken for ripening (16.0), Shelf life (21.0 days),fruit weight (341g), pulp weight (218.23g), Stone weight(61.63g),fruit volume (326.66ml), pulp to peel ratio(3.57 ), pulp to stone ratio (3.54), TSS (21.66oB), acidity (0.22%), total sugars (16.24%), reducing sugars (6.57), non reducing sugars (9.26), organoleptic score (8.23), and non significant difference was found for fruit length, fruit breadth. Highest shelf life of fruits was found in GA3 75 ppm sprays at 20DBH treated fruits followed by CaCl2 1.5 % sprays at 20 DBH treated fruits lowest shelf life of fruits was found in control (11.33). In the 2nd experiment, 8 treatments replicated thrice with CRD designed on (T1)LDPE+5%perforation,(T2)LDPE+Blottingpaper,(T3)LDPE+5%perforation+bl otting paper inside, (T4) Jute gunny bag, (T5) cloth bag,(T6) Plastic fertilizer bag, (T7)Mesh bag.(T8)Control, in this study the results revealed that fruits packed in (T1)LDPE+5%perforation recorded significantly lower physiological loss in weight(%), higher fruit firmness, lower spoilage per cent, good color development, lower ripening percentage, Significantly higher, acidity (%)TSS (oB) and sugars (%) (Reducing and total) correspondingly increased the shelf life up to 16.33 days; the fruits kept under control recorded the shelf life up to 9.66 days only. In 3rd experiment, 9 treatments replicated thrice with CRD design on (T1) CaCl2 1%, (T2) CaCl2 2%, (T3)Ca(NO3)2 1%, (T4)Ca(NO3)2 2%, (T5) KNO31%,(T6) KNO3 2%,(T7) CMC 0.5%, (T8) CMC 1%, (T9)control treatments, in this study the results revealed that fruits treated with Ca(No3)2 2% (T4), recorded significantly lower physiological loss in weight(%), higher fruit firmness, lower spoilage per cent, good color development, lower ripening percentages, significantly higher, acidity (%), TSS(oB) and sugars (%) (Reducing and total) correspondingly increased the shelf life up to 20.33 days, The fruits kept under control recorded the shelf life up to 9.33 days only. The findings from the studies concluded that pre harvest treatment with GA375ppm spray at 20 DBH followed by CaCl21.5% spray at 20DBH for improving the shelf life, quality and fruit chemical parameters, fruits packed in LDPE bag with 5%perforation followed by LDPE bag with 5%perforation+blotting paper, post harvest chemical treatment with Ca(NO3)2 2%,1% followed by CaCl2 2% significantly recorded the maximum fruit firmness, shelf life, lower PLW, good color development, minimum spoilage, higher TSS, total, reducing, non reducing sugars during storage.ennullThesis