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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2019.8(10): 617-625
DOI: https://doi.org/10.20546/ijcmas.2019.810.070


Effect of Agronomic Management Practices and use of Growth Regulators on Yield and Economics of Bt Cotton (Gossypium hirsutum L.) under Irrigated Condition
P. Suma1*, M. Y. Ajayakumar1, B. G. Koppalkar1, D. Krishnamurthy1 and M. V. Ravi2
University of Agricultural sciences, Raichur-584102, Karnataka, India
*Corresponding author
Abstract:

A field experiment was conducted during kharif 2018-19 at Main Agricultural Research Station farm, Raichur, Karnataka. The experiment laid out in split plot design with three replications. The experiment consisted of two main plot treatments viz., 90 × 60 cm (S1) and 120 × 60 cm (S2). The sub plot treatments are M1 (Nipping at 75DAS), M2 (Nipping at 90 DAS), M3 (Spraying of Paclabutrazole 23%SC at 55 DAS and 85DAS), M4 (Spraying of Paclabutrazole 23%SC at 55 DAS and 85DAS + Nipping at 75D), M5 (Spraying of Paclabutrazole 23%SC at 55 DAS and 85DAS+ Nipping at 90 DAS), M6 (Control) and M7 (Farmer’s practice). Data on yield and economics was recorded and statistically analyzed. The experimental results revealed that, spacing of 90 × 60 cm is best spacing for different parameters and is recorded significantly higher seed cotton yield (2693 kg ha-1), number of good opened bolls per plant (24.58), total number of bolls (29.37), boll weight (4.71 g), seed cotton yield per plant (126.9 g),seed index (9.45 g), harvest index (0.43), lint index (4.77), ginning percentage (33.61),), gross returns (Rs. 1,45,416 ha-1), net returns (Rs. 86.379 ha-1) and benefit cost ratio (2.46). Foliar spray of Paclabutrazole 23%SC at 55 DAS and 85DAS + Nipping at 90 DAS (M5) recorded significantly higher seed cotton yield (2788 kg ha-1), number of good opened bolls per plant (31.37), total number of bolls (35.50), boll weight (5.12 g), seed cotton yield per plant (151.2 g), seed index (9.68 g), lint index (4.63), harvest index (0.44) ginning percentage (33.48), gross returns (Rs. 1.50.552 ha-1), net returns (Rs. 90.398 ha-1) and benefit cost ratio (2.50).


Keywords: Bt cotton, Spacing, Paclabutrazole, Nipping, Yield, B:C
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How to cite this article:

Suma, P., M. Y. Ajayakumar, B. G. Koppalkar, D. Krishnamurthy and Ravi, M. V. 2019. Effect of Agronomic Management Practices and use of Growth Regulators on Yield and Economics of Bt Cotton (Gossypium hirsutum L.) under Irrigated Condition.Int.J.Curr.Microbiol.App.Sci. 8(10): 617-625. doi: https://doi.org/10.20546/ijcmas.2019.810.070