Vol. 7, Issue 4 (2019)
Economics of chemical weed control in direct seeded Puddled wet rice under cauvery command area of Karnataka
Author(s): CR Nagesh, SB Yogananda, GR Denesh and SS Prakash
Abstract: A field experiment was entitled ‘â€Economics of chemical weed control in direct seeded Puddled wet rice†was conducted during kharif 2015 at Zonal Agricultural research station, V. C. Farm, Mandya, Karnataka. The experiment consisted of 13 treatments laid out in randomized complete block design with three replications consisting of two pre-emergence herbicides integrated with hand weeding twice at 20 and 40 days after sowing, compared with weed free and unweeded check. The predominant weed flora observed in the experimental field were, Alternenthera sessalis, Eclipta alba, Monochoria vaginalis, Marsilia quadrifolia and Mollugo distica among broad-leaved weeds; Echinochloa colona, Echinochloa crusgalli and Leptochloa chinensis among the grassy weeds and Cyperus iria, Cyperus difformis and FImbristylis miliaceae among sedges. The results revealed that pre-emergence application of Pendimethalin 750 g a.i./ha at 3 DAS fb Penoxsulam (24% SC) 22.5 g a.i./ha at 30 DAS recorded significantly higher grain yield and straw yield ( 6328 kg ha-1 and 7432 kg ha-1 respectively), lower weed population and their dry weight (9.20 /m2 and 3.07 g m2 respectively). Further the net returns (Rs. 34753) and B:C (2.03) Ratio was also high with the pre-emergence application Pendimethalin 750 g a.i./ha at 3 DAS fb Penoxsulam (24% SC) 22.5 g a.i./ha at 30 DAS.
Pages: 2636-2639 | 182 Views 35 Downloads
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How to cite this article:
CR Nagesh, SB Yogananda, GR Denesh, SS Prakash. Economics of chemical weed control in direct seeded Puddled wet rice under cauvery command area of Karnataka. Int J Chem Stud 2019;7(4):2636-2639.
