EFFECT OF PLANT GROWTH REGULATORS ON FLOWER QUALITY, YIELD AND POST HARVEST SHELFLIFE OF CHINA ASTER (CALLISTEPHUS CHINENSIS L. NEES.) CV. LOCAL
Journal Title: International Journal of Agricultural Science and Research (IJASR) - Year 2017, Vol 7, Issue 2
Abstract
An experiment was undertaken to study the “Effect of plant growth regulators on flower quality, yield and post harvest shelflife of China aster (Callistephus chinensis L. Nees). The growth regulators used were gibberellic acid (GA3 @ 100,150 and 200 ppm), salicylic acid (SA @ 50, 100 and 150 ppm), brassinolide (BA @ 0.5, 1.0 and 1.5 ppm) and triacontanol (TR @ 1.0, 2.0 and 3.0 ppm). The growth regulators were applied as foliar sprays at two stages viz., 45 days and 60 days after transplanting and water spray as control. Application of GA3 at 150 ppm promoted the various growth and yield parameters. Spraying of GA3 at 150 ppm promoted early bud initiation (65.45 days) and days taken for full flowering (88.20 days after transplanting), days taken for first flowering (72.47days), days taken for full flowering (88.20 days) and flower stalk length (37.95 cm), flower diameter (6.91 cm), number of flowers plant-1 (52.20), individual flower weight (3.92 g), hundred flower weight (399.47 g), flower yield plant -1 (210.03 g), flower yield plot-1 (6.44 kg) and estimated yield ha-1(16.10 tonnes) were significantly increased by the application of GA3 at 150 ppm. Among the post harvest treatments, flowers maintained in the non ventilated, 200 gauge polyethylene bags with pre harvest sprays of 150 ppm GA3 enhanced the shelf life of flowers (8.68 days) followed by salicylic acid at 100 ppm (8.55 days) and minimum shelf life was recorded in control (3 days in open). Foliar application of GA 3 at 150 ppm would be effective for improved yield and quality of China aster.
Authors and Affiliations
S. VIJAYAKUMAR, K. R. RAJADURAI, P. PANDIYARAJ
Keywords
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