Vol. 7, Issue 4 (2019)
Efficacy of pre and post-emergence herbicides on weed density, weed dry weight and growth and yield of 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 entitled “Efficacy of pre and post-emergence herbicides on weed density, weed dry weight and growth and yield of direct seeded puddled wet rice under Cauvery command area of Karnataka†was conducted during Kharif 2015 at Zonal Agricultural research station, V. C. Farm, Mandya, Karnataka. The experiment involved 13 treatments laid out in randomized complete block design replicated thrice consisting of two pre-emergence herbicides (pendimethalin and Pretilachlor + Bensulfuron methyl) and three post-emergence herbicides (Penoxsulam, Bispyribac sodium and Azimsulfuron) along with l hand weeding. These herbicide treatments were compared with hand weeding and weedy check under direct seeded puddle wet-rice. The major weed flora observed in the experimental field were, Alternenthera sessalis, Eclipta alba, Monochoria vaginalis, Marsilia quadrifolia and among broad-leaved weeds; Echinochloa colona, and Echinochloa crusgalli among the grassy weeds and Cyperus iria, Cyperus difformis and FImbristylis miliaceae among sedges. The results revealed that pre-emergence application of Pendimethalin750 g a.i./ha at 3 DAS followed by Penoxsulam 22.5 g a.i./ha at 30 DAS, recorded significantly higher grain yield and straw yield (6328 and 7432 kg/ha), lower weed population and dry weight (9.20/m2 and 3.70g/m2).
Pages: 2440-2443 | 184 Views 36 Downloads
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How to cite this article:
CR Nagesh, SB Yogananda, GR Denesh, SS Prakash. Efficacy of pre and post-emergence herbicides on weed density, weed dry weight and growth and yield of direct seeded puddled wet rice under Cauvery command area of Karnataka. Int J Chem Stud 2019;7(4):2440-2443.
