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A field experiment was conducted during two consecutive years of Kharif 2012 and 2013 at Agricultural Research Station, Banswara to find out suitable weed management strategies for Bt cotton. The experiment was laid-out in Randomized Block Design with three replications having nine treatments. Results revealed that, the application of pendimethalin 30% EC @ 0.75 kg a.i./ha PE fb quizalofop-P-ethyl 50 g a.i./ha at 20-30 DAS+one hoeing gave significantly higher bolls plant^-1 (36.30), boll weight (4.22 g), seed cotton yield (2275 kg ha^-1), net return (Rs.55581/- ha^-1) and B:C (2.70) over rest of treatments, but it was found at par with weed free check and application of pyrithiobac sodium @ 62.5 g a.i./ha fb quizalofop-P-ethyl 50 g a.i./ha at 20-30 DAS+one hoeing bolls plant^-1 (34.84), boll weight (4.19 g), seed cotton yield (2251 kg ha^-1), net return (Rs.54669/- ha^-1) and B:C (2.64). The maximum weed control efficiency (60.75%), lowest weed population (12.39 m^-2) and weed dry matter accumulation (14.63 g m^-2) at 60 DAS were observed under application of pendimethalin 30% EC @ 0.75 kg a.i./ha PE fb quizalofop-P-ethyl 50 g a.i./ha at 20-30 DAS+one hoeing over rest of treatments. However, it was found at par with weed free check and application of pyrithiobac sodium @ 62.5 g a.i./ha fb quizalofop-P-ethyl 50 g a.i./ha at 20-30 DAS+one hoeing.

Keywords

Cotton, Pendimathlin, Pyrithiobac Sodium, Weed Control Efficiency.

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References

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Performance of Bt Cotton Hybrids Under Various Crop Geometries and Nutrient Levels in Humid Southern Plain Zone of Rajasthan

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Authors

Harphool Meena ¹, P. K. P. Meena ¹, Bheru Lal Kumhar ¹

Affiliations
1 AICRP on Irrigation Water Management, Agricultural Research Station (Agriculture University), Kota (Rajasthan), IN

Source

International Journal of Plant Sciences, Vol 12, No 2 (2017), Pagination: 262-266

Abstract

A field experiment comprised of three Bt hybrids (Leo cott, Paras Brahma and Jai Bt) with two plant geometries (90×45 cm and 90×60 cm ) and three levels of NPK (100% RDF,125% RDF and 150% RDF) was conducted during Kharif 2012 and 2013 at ARS, Banswara in Split Plot Design with four replications. The Bt hybrid of Leo cott gave higher seed cotton yield (2242 kg ha^-1) as compared to Jai Bt and Paras Brahma (1809 and 1755 kg ha^-1), respectively. The closer spacing 90×45 cm was recorded significantly higher seed cotton yield (2240 kg ha^-1) over 90×60 cm (1752 kg ha^-1). Increasing levels of fertilizer from 100% RDF to 150% RDF of NPK ha^-1 significantly increase seed cotton. Application of 125% RDF gave significantly higher seed cotton yield (2249 kg ha^-1) over 100% RDF (1815 kg ha^-1), but it was found at par with application of 150% RDF (2304 kg ha^-1) in the pooled analysis.

Keywords

Leo Cott, Plant Geometry, Seed Cotton Yield, NPK Levels.

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References

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Evaluation of Promising Pre-Release Inter Specific Cotton Hybrids

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Authors

Harphool Meena ¹, K. C. Nagar ², B. L. Kumhar ³

Affiliations
1 Agricultural Research Station (A.U.), Ummedgang Farm, Kota (Rajasthan), IN
2 Krishi Vigyan Kendra, Bhilwara (Rajasthan), IN
3 Jawaharlal Nehru Krishi Vishwavidyalaya, Jabalpur (M.P.), IN

Source

International Journal of Plant Sciences, Vol 13, No 1 (2018), Pagination: 192-195

Abstract

Field experiment was conducted at Agricultural Research Station, Borwat Farm, Banswara during Kharif-2012 to find out the optimum plant geometry and fertility levels for inter specific cotton hybrids. Sowing of RAHB-189 cotton hybrid gave significantly higher seed cotton yield (1798 kg ha^-1) over DCH-32. The maximum seed cotton yield (1976 kg ha^-1) was observed under plant geometry of 90 x 60 cm than closer plant geometry of 90 x 45 cm and wider plant spacing 90 x 90 cm. Though, yield attributing parameters such as bolls plant^-1 and boll weight were statically improved in wider as compared to closer spacing it could be increase the seed cotton yield under sowing at 90 x 60 cm plant spacing. Among fertility levels, similar seed cotton yield was recorded with the application of 100 % RDF (1983 kg ha^-1) and 125 % RDF (2018 kg ha^-1) but both were significantly better than that of 75 % RDF and plant geometry 90 x 60 cm seemed to be ideal for inter specific hybrid cotton for realizing higher productivity under the specific agro climatic zone IV b.

Keywords

Inter Specific Cotton, Plant Geometry, Seed Cotton Yield, Fertility Levels.

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References

Bastia, D.K. (2000). Response of cotton hybrids Savita to spacing and NPK treatments under rainfed condition of Orissa. Indian J. Agric. Sci., 70(8): 541-542.

Blaise, D. and Prasad, R. (2005). Integrated plant nutrient supply: An approach to sustained cotton production. Indian J. Fert., 1 : 37–46.

Buttar, G.S. and Singh, Paramjit (2006). Performance of Bt cotton hybrids at different plant populations in South Western region of Punjab. J. Cotton Res. Dev., 20(1) : 97-98.

Narayana, E., Hema, K., Srinivasulu, K., Prasad, N.V. and Rao, N.H.P. (2007). Agronomic evaluation of G. hirsutum hybrids for varied spacings and nitrogen levels in vertisols under rainfed condition. J. Cotton Res. Dev., 20 (1): 148-150.

Rekha, M. Sree, Dhurua, S. and Rao, Nageswara, G. (2008). Response of desi cotton (G. arboreum) to different plant densities and nitrogen levels under rainfed conditions. J. Cotton Res. Dev., 22 : 38-41.

Sankarnarayanan, K.P., Nalayini and Praharaj, C.S. (2004). Agronomic requirements of Bt cotton hybrid in relation to plant density and fertilizer requirement. Intern. Symp. On Strategies for sustainable cotton production – A global vision, 2. Crop production, 23-25 November, 2004, UAS, Dharwad, 248 pp.

Thokale, J.G., Raut, R.S. and Mehtre, S.S. (2004). Effect of fertilizers and spacings on yield parameters of interspecific hybrid Phule-492 under summer irrigated conditions. J. Cotton Res. Dev., 19(1):167-168.

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