International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 5
First page : (989) Last page : (994)
Article doi: http://dx.doi.org/10.18782/2320-7051.5880

Effect of Growth Regulators and Pinching on Vegetative, Flowering and Flower Yield Parameters in African Marigold cv Culcatta Orange

Anuradha R. W.¹*, Sateesh R. P.², Priyanka T. K., Naveenakumar and Kulakarni, B. S.
Department of Floriculture and Landscape Architecture, University of Horticultural Sciences, Bagalkot
*Corresponding Author E-mail: anuradhahort458@gmail.com
Received: 16.09.2017  |  Revised: 20.10.2017   |  Accepted: 23.10.2017  

 ABSTRACT

Investigation on “Effect of pinching and plant growth regulators on growth, flowering, yield and quality of African marigold (Tagetes erecta L.) cv. Calcutta Orange” was carried out during October, 2015 to February, 2016. The field experiments were carried out to find the effect of two levels of pinching i.e., no pinching and pinching and different plant growth regulators viz., GA3 at 200 ppm, NAA at 60 ppm, CCC at 1000 ppm and TIBA at 1000 ppm. The vegetative, flowering and flower yield  parameters maximum and significant results with pinched plants compared to unpinched plants. However, stem girth initially showed non-significant results, but later at 60 and 90 DAT showed significant results. Among the growth regulators, GA3 spray recorded significantly higher plant height, stem girth, plant spread, flowering and flower yield followed by NAA at all stages of crop growth period. The treatment, CCC spray produced significantly more number of primary and secondary branches followed by GA3. The interactions between pinching and growth regulators among the treatments did not exhibit significant results for all growth, flower yield and its components and flower quality parameters. Among the growth regulators, benefit cost ratio was found to be maximum in GA3 followed by NAA and CCC and minimum benefit cost ratio was found in TIBA. Among pinching, pinching had highest benefit cost ratio compared to unpinched plants, among the interactions, benefit cost ratio was found to be maximum and positive in G1P1, G2P1 and minimum for control G4P0. The experiment can be concluded that pinching of apical bud and foliar spray of GA3 at 200 ppm independently gave higher yield, better quality flowers with maximum benefit in African marigold cv. Calcutta Orange.

Key words: GA3-Gibberellic acid, NAA- Alpha - Naphthalene acetic acid, CCC-Cycocel or 2-chloro ethyl trimethyl ammonium chloride and TIBA-2, 3, 5 triiodobenzoic acid.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Anuradha, R.W., Sateesh, R.P., Priyanka, T.K., Naveenakumar and Kulakarni, B.S., Effect of Growth Regulators and Pinching on Vegetative, Flowering and Flower Yield Parameters in African Marigold cv Culcatta Orange, Int. J. Pure App. Biosci.5(5): 989-994 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5880