~ 2234 ~ International Journal of Chemical Studies 2018; 6(4): 2234-2236 P-ISSN: 2349–8528 E-ISSN: 2321–4902 IJCS 2018; 6(4): 2234-2236 © 2018 IJCS Received: 10-05-2018 Accepted: 17-06-2018 Sonu Kumar a. Department of Floriculture and Landscape, CCS Haryana Agricultural University, Hisar, Haryana, India b. Department of Horticulture, Narendra Deva University of Agriculture & Technology, Kumarganj, Faizabad, Uttar Pradesh, India AK Singh Department of Horticulture, Narendra Deva University of Agriculture & Technology, Kumarganj, Faizabad, Uttar Pradesh, India Govind Vishwakarma Department of Horticulture, Narendra Deva University of Agriculture & Technology, Kumarganj, Faizabad, Uttar Pradesh, India Archana Singh Krishi Vigyan Kendra, Masodha, Faizabad, Uttar Pradesh, India Correspondence Sonu Kumar a. Department of Floriculture and Landscape, CCS Haryana Agricultural University, Hisar, Haryana, India b. Department of Horticulture, Narendra Deva University of Agriculture & Technology, Kumarganj, Faizabad, Uttar Pradesh, India PGR’s consequence on yield attributing trait of China aster ( Callistephus chinensis L. Nees) cv. Ostrich Feather Sonu Kumar, AK Singh, Govind Vishwakarma and Archana Singh Abstract The present investigation was conducted on China aster (Callistephus chinensis L. Nees) cv. Ostrich Feather at the Main Experiment Station, Department of Horticulture, Narendra Deva University of Agriculture & Technology, Kumarganj, Faizabad (U.P.) during the year 2013-14. The experiment was laid out in Randomized Block Design with 10 treatments comprising of three levels each of GA3, NAA and ethrel and a control replicated three times. The observations were recorded for flowering and yield attributing character of China aster cv. Ostrich Feather. The foliar spraying of plant growth regulators GA3, NAA and ethrel was done 30 days after transplanting. The maximum flower stalk length (25.87 cm), diameter of flower (8.40 cm), flower yield per plant (146.27g) as well as flower yield per hectare (130.02g) were recorded with the foliar application of GA3 300ppm and minimum values were recorded in control (water spray). Keywords: GA3, Naa, ethrel, stalk length Introduction Flowers, crowning glory of god creation are an inseparable part of human life. They are part of age old tradition and culture of Indian society symbolizing purity, peace, passion, love and beauty. Due to their aesthetic, economic and social value their demand in the global market is increase tremendously. Among the flowers used for domestic market, China aster (Callistephus chinensis Nees.) is to be considered as one of the important annual and commercial flower crops belongs to family Asteraceae. China aster is native to China and spread to European countries and other tropical countries during 1731 AD. The genus Callistephus is derived from two Greek words Kalistos meaning ‘most beautiful’ and Stephus, ‘a crown’ referring to the flower head. The present day asters have been developed from a single wild species, Callistephus chinensis. The stature is medium tall, 18 to 24 inches in height. The first change in the flower type had been the prolongation or development of central florets and the production of quelled flowers. Germans developed double forms during 18th century. The China aster was therefore, in geitonogamous condition (the pollination is accomplished by rain drops). In some varieties, they mature together leading to self - fertilization. The possibility of some amount of cross-pollination was also opined by him. Flowers are used for the preparation of garlands, in bouquets as fillers, flower arrangements in flower shows and exhibitions. It is popular as a bedding plant and is also used in herbaceous borders in gardens. It is grown as a potted plant and its dwarf cultivars are suitable for edges. Aster is also an important commercial flower crop of Siberia, Russia, Japan, North America, Switzerland and Europe. In India, it is largely grown on commercial scale in Karnataka, Tamil Nadu, Andhra Pradesh, Maharashtra (Pune and Nasik) and West Bengal. Increased flower production, quality of flowers and perfection in the forms of plants are important objectives to be reckoned in commercial flower production. Even though the crop has great significance in the market, there are some bottle necks associated in its cultivation. Non-availability of planting material, lack of improved varieties, high market fluctuation is some of the problems which are often faced by the farmers. Growth and development of plants are under the control of extremely minute quantity of hormone within the plant themselves. Production of improved quality flower depends greatly on the use of plant growth regulators at commercial level.