Effect of plant growth regulators and pinching on growth and flower yield of African marigold (Tagetes erecta L.)
DOI:
https://doi.org/10.24154/jhs.v13i1.30Keywords:
Marigold, growth regulators, GA3, NAA, flowering.Abstract
Marigold is one of the commercially exploited flower crop that belong to the family Asteraceae. Presently, in our country the commercial extraction of marigold carotenoids is becoming popular in many states. The production of economical yield and better quality of marigold flowers, requires proper crop management techniques. Crop regulation and flower forcing are important techniques to make the marigold production profitable. This can be done by adopting pinching and application of PGRs. Hence, an experiment was carried out in the Department of Horticulture, in factorial randamized block design replicated thrice with 14 treatments with two F1 hybrids viz., Gold Benz tall and Maxima yellow. The experiment comprised of GA3 @ 50, 100 and 150ppm, NAA @ 50, 100 and 150ppm, MH @ 250, 500 and 750ppm, Alar @ 200, 400 and 600ppm and pinching with untreated control. The study revealed that the growth parameter like plant height, number of laterals per plant, number of leaves per plant were significantly influenced by the application of GA3 and NAA. Among the varieties, Gold Benz tall performed better for all the growth attributes but var. Maxima yellow performed better for the number of laterals per plant. The plant sprayed with of GA3 @ 150ppm registered the maximum plant height (70.44cm), number of laterals per plant (16.13), number of leaves per plant (383.76) and leaf area (113.51cm2) and control evinced the least values in the growth parameters. Application of GA3 and NAA significantly enhanced flowering when compared to control, while pinching delayed flowering. The treatment of GA3 @ 150ppm in both Gold Benz tall (30.13 and 406.21 g plant-1) and Maxima yellow (33.16 and 402.83 g plant-1 recorded maximum number of flowers per plant and flower yield respectively as compared to control. Based on the above results, it is revealed that foliar spray of GA3 @ 150 ppm was found to be superior in increasing the yield of flowers in both the varieties.
References
Daddagoudar, S. R., Vyakaranahal, B. S., Shekhargouda, M., Nalini Prabhakar, A. S. and Patil, V.S., 2002. Effect of mother plant nutrition and chemical spray on growth and seed yield of China aster cv. Kamini. Seed Research, 30(2): 269-274.
Dalal.S.R., Karale, G.D. and Kalkame Momin,C.H. 2009. Effect of growth regulators on growth, yield and quality of Chrysanthemum under net house conditions. Asian. J. Hort., 4 (1): 161-163.
Dutta, J.P., R. Seemanthini and Khader, M.A. 1993. Regulation of flowering by growth regulators in chrysanthemum (Chrysanthemum indium L.) cv. Co-1. South Indian Hort., 41(5): 293-299.
Girwani, A., Baba, R.S. and Chandrashekhar, R.1990. Response of marigold (Tagetes erecta L.) to growth regulators and zinc. Indian Agric.Sci., 60(3): 220-222.
Gowda N.J.V., and Jayanthi,R. 1991. Effect of CCC and MH on growth and flowering of African marigold (Tagetes erecta L.). Prog. Hort., 23 (1-4): 114 – 118.
Gupta, V. N. and Datta,S.K. 2000. Influence of GA3 on growth and flowering in chrysanthemum (Chrysanthemum morifolium ramat.) cv.Janthi. Indian J. Plant Physiol. 6(4): 420-422.
Kewalanand, J.N and Pandy,C.S. 1998. Effect of plant growth regulators on the growth, herbage and oil yield of Japanese mint (Mentha arvensis ) and its economic there from. J. Med. Arom Plant Sci., 20: 725 – 730.
Khanna, K., Arora , J. S. and Singh, J., 1981. Effect of spacing and pinching on growth and flower production of carnation (Dianthus caryophyllus cv.Marguerite Scarlet). J. Orn. Hort., 5(1-2): 16-19.
Kumar, S., and Haripriya,K. (2010). Effects of growth retardants on growth, flowering and yield of Nerium ( Nerium odorum L.). Plant Archives., 10( 2) : 681 – 384.
Kumar, K.K. and Ughreja, P.P. (1998). Effect of foliar application of GA3, NAA, MH and Etheral on growth, flowering and flower yield of chrysanthemum (Chrysanthemum morifolium) cv. IIHR-6. J. Applied Hort., 4(1-2): 20-26
Narayana Gowda, J. V., 1985. Investigation on horticultural practices in the production of China aster (Callistephus chinensis L. Nees). Ph.D., Thesis, University of Agricultural Sciences, Bangalore.
Panse, V.G. and Sukhatme, P.V., 1967. Statistical methods for agricultural workers, ICAR, New Delhi. p. 381 (1967).
Ragaa A. and Taha, 2012. Effect of some grown regulators on growth, flowering, bulb productivity and chemical composition of Iris plants. J.Hort. Sci. & Orn. Plants, 4 (2): 215 – 220.
Rakesh, Singhrot, R.S., and Beniwal, 2003. Effect of GA3 and pinching on growth and yield in chrysanthemum. Haryana J. Hort. Sci, 32(1&2): 61-63.
Sen, S.K. and Maharana, T. (1971). Growth and flowering response of chrysanthemum to growth regulator treatments. Punjab Hort. J., 11: 276-279.
Sen, S.K and Naik, J., 1977. Growth and flowering response of pinched and unpinched chrysanthemum to growth regulator treatment. Indian J. Hort., 33:86-90.
Shukla, A and A.H. Farooqi, 1990. Utilization of plant growth regulators in aromatic plant production. Curr. Res. Med, Arom. Plants, 12: 152 – 157.
Singhrot, R.S., Beniwal, B.S. and Moond, S.K. 2004. Effect of GA3 and pinching on quality and yield of flowers in chrysanthemum. J. Hort. Sci., 32 (1&2):224-226.
Sunitha, H.M., Ravi Hunje, B.S.,Vyakaranahal and H.B. Bablad. 2007. Effect of plant population, nutrition, pinching and growth regulators on plant growth, seed yield and quality of African marigold (Tagetes erecta Linn.). J. Orn. Hort., 10(2): 90-95
Talukdar MC, Paswan L (1988). Effect of GA3 and CCC on growth and flowering of standard chrysanthemum. J. Orn. Hort.1: 11-16.
Vijai Ananth, A and Anburani,A. (2010). Effects of growth retardants on growth and yield in nerium ( Nerium odorum L.). J. Orn. Hort., 13 (3): 240 - 242.
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