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Research Article

volume 53 issue 1 (february 2019) : 116-119,   Doi: 10.18805/IJARe.A-4888

Impact of harvest-aid defoliants on yield and economics of high density cotton

K
Kancheti Mrunalini
M
M. Sree Rekha
V
V.R.K Murthy
K
K. Jayalalitha
1Department of Agronomy, Agricultural College, Bapatla-522 101, Andhra Pradesh, India.
Cite article:- Mrunalini Kancheti, Rekha Sree M., Murthy V.R.K, Jayalalitha K. (2019). Impact of harvest-aid defoliants on yield and economics of high density cotton. Indian Journal of Agricultural Research. 53(1): 116-119. doi: 10.18805/IJARe.A-4888.

ABSTRACT

A field experiment was conducted to study the effect of chemical defoliation on growth parameters, seed cotton yield and economics of cotton under high density planting during kharif,  2016. Defoliation with Etherel @ 2000 ppm at 60 boll opening percentage resulted in higher number of picked bolls plant-1 and boll opening percentage and seed cotton yield (2359 kg ha-1).  At harvest, significantly highest drymatter accumulation was recorded with Urea @ 15% (T6) (22692 kg ha-1). Dropp Ultra 560 SC (Thidiazuron 360 + Diuron 180) @ 200 ml/ha recorded significantly higher leaf defoliation (99.7 %) and was superior over other defoliants tried. Application of defoliants i.e., Dropp Ultra and Etherel at 60 BOP resulted in reduction of crop duration by 20 days.

REFERENCES

  1. Buttar, G.S. and Singh, S. (2013). Effect of Ethrel dose and time of application on growth, yield and duration of Bt cotton in semi arid region of Punjab. Journal of Cotton Research and Development. 27: 56-59. 
  2. Christidis, B. G. and Herrisen, G. J. (1955). Cotton Growing Problems, McGraw-Hill Book Company Inc. New York 457-462.
  3. Karademir, E., Karademir, C and Basbag, S. (2007). Determination the effect of defoliation timing on cotton yield and quality. Journal of Central European Agriculture. 8(3): 357-362.
  4. Meena, R.A., Monga, D and Ratna, S. (2016). Effect of defoliation on maturity behaviour and seed cotton yield in cotton. Journal of Cotton Research and Development. 30(1): 63-35.
  5. Rajini, Deol, J.S and Brar, A.S. (2011). Effect of chemical defoliation on boll opening percentage, yield and quality parameters of Bt Cotton (Gossypium hirsutum). Indian Journal of Agronomy. 56(1): 74-77. 
  6. Ramesh Babu., Rao, M.V.H., Murali Krishna, S., Gurmurthy, R and Krishnappa, M.R. (1995). Effect of chemical defoliants on earliness, seed cotton yield and quality of upland cotton (Gossypium hirsutum L.) under irrigated conditions. Indian Journal of Agronomy. 40(1): 157-159. 
  7. Singh, T., Brar, Z.S., Prakash, R and Hassan, H. (2003). Effect of dates of planting and defoliant on yield and quality of cotton (Gossypium hirsutum L). Journal of Cotton Research and Development. 17: 146-149.
  8. Tuppad, G.B., Shashidhara, G.B., Biradar, D. P., Alagundagi, S. C and Patil, S.S. (2016). Effect of chemical defoliator application on yield and economics of compact genotypes. Research in Environment and Life Sciences. 9(3): 292-296.
  9. Wankhade, S.T. and Bathkal, B.G. (1994). Yield potential of Asiatic cottons under different nitrogen and plant density levels (rainfed). Punjabrao Krishi Vidyapeeth Journal. 196: 53-54. 
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    Research Article

    volume 53 issue 1 (february 2019) : 116-119,   Doi: 10.18805/IJARe.A-4888

    Impact of harvest-aid defoliants on yield and economics of high density cotton

    K
    Kancheti Mrunalini
    M
    M. Sree Rekha
    V
    V.R.K Murthy
    K
    K. Jayalalitha
    1Department of Agronomy, Agricultural College, Bapatla-522 101, Andhra Pradesh, India.
    Cite article:- Mrunalini Kancheti, Rekha Sree M., Murthy V.R.K, Jayalalitha K. (2019). Impact of harvest-aid defoliants on yield and economics of high density cotton. Indian Journal of Agricultural Research. 53(1): 116-119. doi: 10.18805/IJARe.A-4888.

    ABSTRACT

    A field experiment was conducted to study the effect of chemical defoliation on growth parameters, seed cotton yield and economics of cotton under high density planting during kharif,  2016. Defoliation with Etherel @ 2000 ppm at 60 boll opening percentage resulted in higher number of picked bolls plant-1 and boll opening percentage and seed cotton yield (2359 kg ha-1).  At harvest, significantly highest drymatter accumulation was recorded with Urea @ 15% (T6) (22692 kg ha-1). Dropp Ultra 560 SC (Thidiazuron 360 + Diuron 180) @ 200 ml/ha recorded significantly higher leaf defoliation (99.7 %) and was superior over other defoliants tried. Application of defoliants i.e., Dropp Ultra and Etherel at 60 BOP resulted in reduction of crop duration by 20 days.

    REFERENCES

    1. Buttar, G.S. and Singh, S. (2013). Effect of Ethrel dose and time of application on growth, yield and duration of Bt cotton in semi arid region of Punjab. Journal of Cotton Research and Development. 27: 56-59. 
    2. Christidis, B. G. and Herrisen, G. J. (1955). Cotton Growing Problems, McGraw-Hill Book Company Inc. New York 457-462.
    3. Karademir, E., Karademir, C and Basbag, S. (2007). Determination the effect of defoliation timing on cotton yield and quality. Journal of Central European Agriculture. 8(3): 357-362.
    4. Meena, R.A., Monga, D and Ratna, S. (2016). Effect of defoliation on maturity behaviour and seed cotton yield in cotton. Journal of Cotton Research and Development. 30(1): 63-35.
    5. Rajini, Deol, J.S and Brar, A.S. (2011). Effect of chemical defoliation on boll opening percentage, yield and quality parameters of Bt Cotton (Gossypium hirsutum). Indian Journal of Agronomy. 56(1): 74-77. 
    6. Ramesh Babu., Rao, M.V.H., Murali Krishna, S., Gurmurthy, R and Krishnappa, M.R. (1995). Effect of chemical defoliants on earliness, seed cotton yield and quality of upland cotton (Gossypium hirsutum L.) under irrigated conditions. Indian Journal of Agronomy. 40(1): 157-159. 
    7. Singh, T., Brar, Z.S., Prakash, R and Hassan, H. (2003). Effect of dates of planting and defoliant on yield and quality of cotton (Gossypium hirsutum L). Journal of Cotton Research and Development. 17: 146-149.
    8. Tuppad, G.B., Shashidhara, G.B., Biradar, D. P., Alagundagi, S. C and Patil, S.S. (2016). Effect of chemical defoliator application on yield and economics of compact genotypes. Research in Environment and Life Sciences. 9(3): 292-296.
    9. Wankhade, S.T. and Bathkal, B.G. (1994). Yield potential of Asiatic cottons under different nitrogen and plant density levels (rainfed). Punjabrao Krishi Vidyapeeth Journal. 196: 53-54. 
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