International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 4
First page : (1969) Last page : (1979)
Article doi: http://dx.doi.org/10.18782/2320-7051.5346
Impact of High Density Planting and Weed Management Practices on Weed Density, Weed Drymatter and Yield of Bt Cotton
B. Madavi1*, P. Leela Rani2, G. Sreenivas3 and K. Surekha4
1Department of Agronomy, College of Agriculture, PJTSAU, Rajendranagar, Hyderabad, India
2AICRP on Weed Management, PJTSAU, Rajendranagar, Hyderabad, India
3Agro Climate Research Centre, ARI, PJTSAU, Rajendranagar, Hyderabad, India
4Indian Institute of Rice Research, Rajendranagar, Hyderabad, India
*Corresponding Author E-mail: bodigemadavi@gmail.com
Received: 17.07.2017 | Revised: 28.07.2017 | Accepted: 29.07.2017
ABSTRACT
An experiment was conducted on Bt cotton during kharif, 2015 at College farm, College of Agriculture, Rajendranagar, Hyderabad,india comprised of four population densities 55,555 plants ha-1 (D1-60 cm×30 cm), 1,11,111 plants ha-1 (D2-60 cm×15 cm) normal planting, 1,11,111 plants ha-1 (D3-60 cm×15 cm - 45 cm×75 cm ) paired row planting, 1,48,148 plants ha-1 (D4-45 cm×15 cm) and weed management practices (pendimethalin 1.0 kg ha-1 as pre emergence fb pyrithiobac sodium 62.5 g ha-1+quizalofop-p-ethyl 50g ha-1 at 20, 40, 60, DAS (W1), pyrithiobac sodium 62.5 g ha-1+quizalofop-p-ethyl 50 g ha-1 at 15 DAS as early post emergence fb glyphosate ammomium salt 2.13 kg ha-1 at 45 DAS (W2), pendimethalin 1.0 kg ha-1 as pre emergence fb HW at 20 and 45 DAS (W3) and unweeded control (W4) in randomized block design (factorial), replicated thrice. The plant density of normal planting 1,11,111 plants ha-1 (60 cm x 15 cm) produced significantly more kapas yield (3134 kg ha-1) with reduced weed drymatter and density over high plant density of 1, 11,111 plants ha-1 paired row planting and 1, 48,148 plants ha-1(45 cm×15 cm). However, remaining three plant densities showed comparable yields. Among the weed management practices, pre emergence application of pendimethalin 1.0 kg ha-1 fb PoE tank mix application of pyrithiobac sodium 62.5 g ha-1+quizalofop-p-ethyl 50 g ha-1 at 20, 40, 60 DAS recorded more kapas yield (3119 kg ha-1) with reduced weed drymatter, and density.
Key words: High density, Bt cotton,Weed density, Weed drymatter
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Madavi, B., Rani, P. L., Sreenivas, G. and Surekha, K., Impact of High Density Planting and Weed Management Practices on Weed Density, Weed Drymatter and Yield of Bt Cotton, Int. J. Pure App. Biosci.5(4): 1969-1979 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5346
