International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 5
First page : (84) Last page : (87)
Article doi: http://dx.doi.org/10.18782/2320-7051.5715

Influence of Different Irrigation Regimes and Weed Control Measures on Weeds of Lowland Transplanted Rice during Boro Season

G. Satyanarayana Reddy*, P. Bandyopadhyay and D. Maiti
Department of Agronomy, Bidhan Chandra Krishi Viswavidyalaya,
Mohanpur, Nadia, West Bengal-741 252
*Corresponding Author E-mail: satishreddyagrico@gmail.com
Received: 5.08.2017  |  Revised: 14.08.2017   |  Accepted: 16.08.2017  

 ABSTRACT

Rice (Oryza sativa L.) is one of the most important staple foods for the people of Southeast Asia including India. Rice is consequently the most important agricultural ecosystem and present and future food security of the country mostly depends on it. A field experiment was conducted at Balindi research complex of Bidhan Chandra Krishi Viswavidyalaya during boro season of 2012-13 and 2013-14, to study the influence of different irrigation regimes and weed control measures on performance of lowland transplanted rice during boro season. The field experiment was laid out in split plot design with different irrigation regimes (I1-Continuous submergence of 5±2 cm; I2-Rotational water supply 4days on 3 days off; I3- Rotational water supply 3days on 2 days off; I4- Rotational water supply 2days on 1day off; I5-Continuous saturation) in main plots and weed management practices (W1-Unweeded check; W2-Weed-free check; W3-Pretilachlor 50 EC 500 g a.i. ha-1 on 1 DAT + hand weeding on 40 DAT; W4-Bispyribac sodium 10 SC 30 g a.i. ha-1 on 20 DAT + hand weeding on 40 DAT; W5-Hand weeding twice on 20 and 40 DAT) in sub plots with three replications. The predominant weed species prevalent in the experimental field were composite in nature and among them Cyperus difformis, Echinochloa colona, Echinochloa formosensis, Marsilea quadrifoliata, Alternanthera philoxeroides were the most predominant weeds. Among the herbicidal treatments, pre-emergence application of pretilachlor 50 EC 500 g a.i. ha-1 at 1 DAT + HW at 40 DAT was recorded low weed density, dry weight and higher weed control efficiency (81.8 and 82.4%) values were recorded with Pretilachlor 50 EC 500 g a.i. ha-1 on 1 DAT + hand weeding on 40 DAT at 30 & 60 DAT, respectively.

Key words: Rice, Weeds, Irrigation regimes, Boro season

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Reddy, G.S., Bandyopadhyay, P. and Maiti, D., Influence of Different Irrigation Regimes and Weed Control Measures on Weeds of Lowland Transplanted Rice during Boro Season, Int. J. Pure App. Biosci.5(5): 84-87 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5715