EFFECT OF SEEDLING DIP AND PRE-HARVEST SPRAY OF CHEMICALS ON STORAGE BEHAVIOR OF ONION VAR. ARKA KALYAN

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dc.contributor.advisorS. L., Jagadeesh
dc.contributor.advisorC. P., Mansur
dc.contributor.advisorRevanappa
dc.contributor.advisorAwati, Mallikarjun
dc.contributor.advisorY. S., Mahesh
dc.contributor.advisorG. J., Suresh
dc.contributor.authorTSEWANG, RIGZEN
dc.date.accessioned2018-02-19T09:25:58Z
dc.date.available2018-02-19T09:25:58Z
dc.date.issued2016-06
dc.description.abstractThe present investigation was conducted in the Department of Post Harvest Technology, College of Horticulture, Bagalkot, Karnataka during the year 2015-16 to evaluate the effectiveness of seedling dip (salicylic acid 2mM) and pre-harvest foliar sprays with different chemicals (salicylic acid 2mM, azoxystrobin at 0.05% and 0.1%, ethephon at 5000 ppm) at different time intervals (60 and 90 DAT) on storage behavior, physiological, physio-chemical changes, sprouting, rotting, disease control and sensory parameters of onion bulbs (Var. Arka Kalyan) packed in gunny bags and stored at ambient temperature. All the treatments showed non-significant differences for yield, number of bulbs per kg and bulb diameter. The physiological loss in weight (PLW) was found to be minimum (11.62%) in the treatment T5 (seedling dip and 2 mM salicylic acid at 60 and 90 DAT), whereas minimum respiration rate (18.58 ml CO2/kg/h) was observed in the treatment T2 (salicylic acid- 2mM 90 DAT). Minimum sprouting was present in T8 (azoxystrobin- 0.1% at 90 DAT) and T6 (azoxystrobin- 0.05%) (0.96%). Minimum black mould disease incidence was noted in the treatment T8 (azoxystrobin- 0.1% at 90 DAT) (0.74%). Pyruvic acid, indicating pungency was noted to be maximum in T5 (Seedling dip+salicylic acid-2mM at 60+90 DAT) (8.92 μmoles/g). The treatment T9 (azoxystrobin- 0.1% at 60+90 DAT) recorded maximum total phenol (13.92 mg/100 g), minimum rotting (1.86%) and maximum marketable bulbs (94.97%). The maximum firmness was seen in the treatment T3 (salicylic acid- 2mM at 60+90 DAT) (9.89 kg/cm2). Onions of treatment T10 (ethephon- 5000 ppm at 90 DAT) with maximum dry matter (20.96%), minimum per cent moisture (77.91%) and maximum TSS (16.30°B) obtained the highest overall acceptability scores (7.89) which had no statistical difference with other treatments. In conclusion, azoxystrobin 0.1% at 60+90 DAT and SA 2mM seedling dip+pre-harvest spray at 60+90 DAT were found effective in maintaining quality and shelf life of onions. Pre-harvest spray of ethephon was found to be ineffective in extending the shelf life of onions as it increased PLW, respiration, sprouting, rotting thus decreasing marketable bulbs.en_US
dc.identifier.otherUHS14PGM487
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810041142
dc.keywordsPOST HARVEST TECHNOLOGYen_US
dc.language.isoenen_US
dc.publisherUniversity of Horticultural Sciences, Bagalkoten_US
dc.subPost Harvest Technologyen_US
dc.subjectnullen_US
dc.themeEFFECT OF SEEDLING DIP AND PRE-HARVEST SPRAY OF CHEMICALS ON STORAGE BEHAVIOR OF ONION VAR. ARKA KALYANen_US
dc.these.typeM.Scen_US
dc.titleEFFECT OF SEEDLING DIP AND PRE-HARVEST SPRAY OF CHEMICALS ON STORAGE BEHAVIOR OF ONION VAR. ARKA KALYANen_US
dc.typeThesisen_US
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