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Journal of Progressive Agriculture
Year : 2013, Volume : 4, Issue : 1
First page : ( 96) Last page : ( 101)
Print ISSN : 2229-4244. Online ISSN : 2278-0556.

Effect of integrated weed management on weed flora distribution, weed dynamics and performance of rice (Oryza sativa L.) under system of rice intensification (SRI) in Chhattisgarh

Dewangan Devendra Kumar, Singh A.P.

Department of Agronomy, Indira Gandhi Krishi Vishwavidyalaya, Raipur-492012, Chhattisgarh, India

Online published on 29 July, 2013.

Abstract

A field experiment conducted at Research cum-Instructional Farm, Department of Agronomy, IGKV, Raipur (C.G.) during Kharif season of 2009 in Randomized Block Design (RBD) with three replications. The dominated weed flora of the rice field comprised Alternanthera triendra, Echinocloa colona, Fimbristylis miliacea and Cyperus iria throughout the crop season. Other weeds were Ischaemum rugosum, Boreria sirida, Commelina benghalensis, Cynotis axillaris, Aescheynomene indica etc. observed in the experiment field. Results revealed that post-emergence combined application of Fenoxaprop-p-ethyl 60 g ha−1 + Ethoxysulfuron 15 g ha−1 at 20 and 35 DAT was statistically at par with hand weeding (twice) at 20 and 40 DAT for controlling weeds effectively in system of rice intensification method of rice. The maximum grain yield and straw yield was recorded under Fenoxaprop-p-ethyl 60 g ha−1+ Ethoxysulfuron 15 g ha−1 at 20 and 35 DAT followed by hand weeding. All the treatments gave significantly higher seed yield than unweeded control. The highest gross return and B:C ratio was obtained from Fenoxaprop-p-ethyl 60 g ha−1+ Ethoxysulfuron 15 g ha−1 at 20 and 35 DAT followed by hand weeding and lowest from unweeded control.

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Keywords

Rice, Weed Flora, Weed Dynamics, Integrated Weed Management.

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