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Ayeeshya abstract (research)

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Aisha Kolhar

The study investigated the effects of salicylic acid, azoxystrobin, and cycocel treatments on the shelf life of onion variety Arka Kalyan. Onion seedlings were dipped in or sprayed with different treatments at 60 and 90 days after transplanting. After harvest and curing, bulbs were stored at ambient conditions. Treatments with salicylic acid (SA) @ 2 mM and azoxystrobin @ 0.1% at 60 + 90 days after transplanting followed by cycocel 2500 ppm at 90 days after transplanting significantly reduced weight loss and had the highest marketable bulbs. This treatment also resulted in bulbs with the highest firmness, total

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STUDIES ON FIELD APPLICATION OF SALICYLIC ACID, AZOXYSTROBIN AND CYCOCEL ON SHELF LIFE OF ONION VAR. ARKA KALYAN AYEESHYA H. KOLHAR 2017 Dr. S. L. JAGADEESH Major Advisor ABSTRACT An investigation entitled Studies on field application of salicylic acid, azoxystrobin and cycocel on shelf life of onion cv. Arka Kalyan was conducted in the Department of Post Harvest Technology, COH, Bagalkot, Karnataka during the year 2016-2017. Onion cv. Arka Kalyan was imposed with seedling dip and pre-harvest foliar sprays at different time intervals at 60 and 90 days after transplanting (DAT). After harvesting bulbs were cured properly and stored under ambient condition. Various physiological and physico-chemical changes were recorded at monthly intervals for 4 months. Treatments showed significant differences for yield, number of bulbs per kg and bulb diameter. Foliar spray of salicylic acid (SA) @ 2 mM and azoxystrobin @ 0.1% at 60 + 90 DAT followed by CCC 2500 ppm foliar spray @ 90 DAT (T11) significantly reduced the physiological loss in weight (PLW) (11.62%), and bulbs of the treatment T3 (Seedling dip in SA @ 2 mM + SA @ 2 mM 60 + 90 DAT) exhibited least rate of respiration (15.29 ml CO2/Kg/h). Minimum sprouting was observed in the treatment T12 (Seedling dip in salicylic acid @ 2 mM + SA @ 2 mM, azoxystrobin @ 0.1% at 60 + 90 DAT and CCC 2500 ppm at 90 DAT) (2.26%) and bulbs of the treatment T5 (SA @ 2 mM and azoxystrobin @ 0.1% at 60 + 90 DAT) exhibit least rotting (1.87%). Reduced incidence of black mould was noticed in the treatment T12 (1.63%) and maximum per cent marketable were obtained in the treatment T11 (85.54%). The Maximum mean dry matter (18.38%) and minimum per cent moisture (81.60%) was noticed in treatment T4 (Pre-harvest spray of azoxystrobin @ 0.1% at 60 + 90 DAT). Bulbs of the treatment T11 were found to be more firmner (123.38 N), contained more total solubule solids (15.14 属B) and bulbs scored maximum for overall acceptability(7.90 out of 9) Pyruvic acid, indicating pungency was noted to be maximum in T6 (Seedling dip SA @ 2 mM + SA @ 2 mM and azoxystrobin @ 0.1% at 60 + 90 DAT) (8.71 袖moles/g) and the same treatment recorded maximum total phenol (13.73 mg/100g). In conclusion, foliar application of SA (2 mM), azoxystrobin (0.1%) at 60 + 90 DAT and CCC (2500 ppm) at 90 DAT was effective in maintaining quality and shelf life of onion.

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Ayeeshya abstract (research)

  • 1. STUDIES ON FIELD APPLICATION OF SALICYLIC ACID, AZOXYSTROBIN AND CYCOCEL ON SHELF LIFE OF ONION VAR. ARKA KALYAN AYEESHYA H. KOLHAR 2017 Dr. S. L. JAGADEESH Major Advisor ABSTRACT An investigation entitled Studies on field application of salicylic acid, azoxystrobin and cycocel on shelf life of onion cv. Arka Kalyan was conducted in the Department of Post Harvest Technology, COH, Bagalkot, Karnataka during the year 2016-2017. Onion cv. Arka Kalyan was imposed with seedling dip and pre-harvest foliar sprays at different time intervals at 60 and 90 days after transplanting (DAT). After harvesting bulbs were cured properly and stored under ambient condition. Various physiological and physico-chemical changes were recorded at monthly intervals for 4 months. Treatments showed significant differences for yield, number of bulbs per kg and bulb diameter. Foliar spray of salicylic acid (SA) @ 2 mM and azoxystrobin @ 0.1% at 60 + 90 DAT followed by CCC 2500 ppm foliar spray @ 90 DAT (T11) significantly reduced the physiological loss in weight (PLW) (11.62%), and bulbs of the treatment T3 (Seedling dip in SA @ 2 mM + SA @ 2 mM 60 + 90 DAT) exhibited least rate of respiration (15.29 ml CO2/Kg/h). Minimum sprouting was observed in the treatment T12 (Seedling dip in salicylic acid @ 2 mM + SA @ 2 mM, azoxystrobin @ 0.1% at 60 + 90 DAT and CCC 2500 ppm at 90 DAT) (2.26%) and bulbs of the treatment T5 (SA @ 2 mM and azoxystrobin @ 0.1% at 60 + 90 DAT) exhibit least rotting (1.87%). Reduced incidence of black mould was noticed in the treatment T12 (1.63%) and maximum per cent marketable were obtained in the treatment T11 (85.54%). The Maximum mean dry matter (18.38%) and minimum per cent moisture (81.60%) was noticed in treatment T4 (Pre-harvest spray of azoxystrobin @ 0.1% at 60 + 90 DAT). Bulbs of the treatment T11 were found to be more firmner (123.38 N), contained more total solubule solids (15.14 属B) and bulbs scored maximum for overall acceptability(7.90 out of 9) Pyruvic acid, indicating pungency was noted to be maximum in T6 (Seedling dip SA @ 2 mM + SA @ 2 mM and azoxystrobin @ 0.1% at 60 + 90 DAT) (8.71 袖moles/g) and the same treatment recorded maximum total phenol (13.73 mg/100g). In conclusion, foliar application of SA (2 mM), azoxystrobin (0.1%) at 60 + 90 DAT and CCC (2500 ppm) at 90 DAT was effective in maintaining quality and shelf life of onion.