Vol. 4 (1) : January-February 2013 issue
Green Farming Vol. 4 (1) : 40-42 (January-February, 2013)
Enhancing the productivity of Bt cotton by planting geometry and chloro mepiquat chloride application
K. SHEKAR1*, M. VENKATA RAMANA2 and S. SRIDEVI3
Department of Agronomy, College of Agriculture, Rajendranagar, Hyderabad – 500 030 (Andhra Pradesh)
Designation : 1P.G. Student *(shekaragrico@gmail.com), 2Sr. Scientist, 3Scientist
Subject : Agronomy and Crop Production
Paper No. : P-0520
Total Pages : 3
Received : 26 September 2012
Revised accepted : 19 December 2012
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Citation :
K. SHEKAR, M. VENKATA RAMANA and S. SRIDEVI. 2013. Enhancing the productivity of Bt cotton by planting geometry and chloro mepiquat chloride application. Green Farming Vol. 4 (1) : 40-42 ; January-February, 2013
ABSTRACT
A field experiment was conducted during kharif, 2010 at College Farm, Rajendranagar, Hyderabad to study the effect of different plant densities and growth regulator application on Bt cotton with twelve treatments replicated thrice in RBD. The growth measured in terms of plant height (130.4 cm), height to node ratio (5.51) and dry mater produced (4514 kg ha-1) was higher at a closer spacing compared to that of wider spacings. The results revealed that among plant densities, population at 90 cm x 30 cm spacing recorded significantly higher seed cotton yield (1668 kg ha-1), Net monetary returns (Rs. 24, 209 ha-1) over that of 90 cm x 45 cm and 90 cm x 60 cm spacings. The growth parameters were significantly lower with two sprays of chloro mepiquat chloride followed by single spray when compared to control plot and de-topping treatment. The seed cotton yield (1635 kg ha-1), net returns (Rs. 24,572 ha-1) were significantly higher with two sprays of chloro mepiquat chloride compared to single spray (1556 kg ha-1), (Rs. 23,267 ha-1), de-topping (1310 kg ha-1), (Rs. 17,566 ha-1) and control (1282 kg ha-1), (Rs. 17,494 ha-1 ) respectively.
Key words :
Bt cotton, Chloro mepiquat chloride, Spacing.
