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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 4
First page : (423) Last page : (430 )
Article doi: : http://dx.doi.org/10.18782/2320-6507

Effect of Season and Plant Growth Regulators on Crop Growth and Yield in Dolichos Bean [Lablab purpureus (L.) Sweet]

Pramoda and Ashok S. Sajjan*

Department of Seed Science and Technology, University of Agricultural Sciences Dharwad – 580005
*Corresponding Author E-mail: assajjan@gmail.com
Received: 22.05.2018  |  Revised: 27.06.2018   |  Accepted: 5.07.2018  

 

 ABSTRACT

The field experiments were  carried out  during 2016-17 at Department of Seed Science and Technology, UAS Dharwad. There are 18 treatment combinations involving two seasons viz., kharif season 2016 and rabi season 2016-17 and plant growth regulators as other factor viz.,  G1: Control, G2 : GA3 @ 50 ppm, G3 : NAA @ 40 ppm, G4 : Cycocel @ 100 ppm, G5 : Mepiquat chloride @ 50 ppm, G6 : Nitrobenzene @ 200 ppm, G7: TIBA  @ 50 ppm, G8 : Brassinosteroids @ 200 ppm, G9 : GA3 @ 5 ppm + IAA  @ 5 ppm. The results shows that more number of branches (9.83) per plant at harvest , higher relative chlorophyll content (SPAD value) (49.76), days to flower initiation (41.59)  and also for less days to 50 % flowering (45.97) days and early (51.91) days to pod initiation and (90.50) days to pod maturity compared to kharif season (S1) except plant height. Among the plant growth regulator foliar spray, higher plant height and number of branches (114.80 cm and 10.87, respectively) at harvest, higher relative chlorophyll content (SPAD value) (51.08) ,early flower initiation , pod maturity was recorded in NAA @ 40 ppm and least was  seen in control plots (G1) followed by in nitrobenzene @ 200 ppm. The interaction effect was found to be non significant However, foliar spraying of  NAA @ 40 ppm recorded higher  growth and yield attributing parameters as compared  to control.

Key words: Dolichos bean, Rabi season, NAA, nitrobenzene, SPAD value and Seed yield.

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

Cite this article: Pramoda and Sajjan, A.S., Effect of Season and Plant Growth Regulators on Crop Growth and Yield in Dolichos Bean [Lablab purpureus (L.) Sweet], Int. J. Pure App. Biosci.6(4): 423-430 (2018). doi: http://dx.doi.org/10.18782/2320-7051.6507