Vol. 5, Issue 5 (2017)
Effect of various pre and post emergence herbicides on crop yield and weed dynamics under different rice establishment methods in Sodic soil environment
Author(s): M Revathi, K Annadurai and C Chinnusamy
Abstract:
Field experiments were conducted at Anbil Dharmalingam Agricultural College and Research Institute, Tiruchirappalli during rabi 2011-12 and 2012-13. Four crop establishment techniques viz., Manual line transplanting, Mechanical line transplanting, Direct Planting System (DPS) and Drum seeded rice and six weed management practices viz., PE Pyrazosulfuron Ethyl 30 g a.i. ha-1 + POE Almix (pre-mix formulation of metsulfuron methyl 10% + chlorimuron ethyl 10% WP) 4 g a.i. ha-1, PE Pyrazosulfuron Ethyl 30 g a.i. ha-1 + POE Bispyribac Sodium 20 g a.i. ha-1, PE Londax power (pre-mix formulation of bensulfuron methyl 0.6% + pretilachlor 6% GR) 10.0 Kg ha-1 + POE Almix (pre-mix formulation of metsulfuron methyl 10% + chlorimuron ethyl 10% WP) 4 g a.i. ha-1, PE Londax power (pre-mix formulation of bensulfuron methyl 0.6% + pretilachlor 6% GR)10.0 Kg ha-1 + POE Bispyribac sodium 20 g a.i. ha-1, two hand weeding and un-weeded control were allotted to main and sub plots, respectively. The experiments were laid out in a strip plot design with three replications. Direct planting system (DPS) reduced weed density and dry weight, and it was followed by mechanical line transplanting at all the stages during both the years. Regarding weed management practices, significantly lower weed density and dry weight and higher weed control efficiency were observed in two hand weeding at 20 and 40 DAT/S and it was comparable with PE pyrazosulfuron ethyl 30 g a.i. ha-1 + POE bispyribac sodium 20 g a.i. ha-1 during both the years of study. Among crop establishment techniques, direct planting system (DPS) recorded higher yield of 5048 & 4639 kg ha-1 during rabi 2011-12 & 2012-13 and among weed management practices, hand weeding twice gave better yield of 5335 & 5062 kg ha-1 during rabi 2011-12 & 2012-13, respectively.
Pages: 1531-1536 | 851 Views 103 Downloads
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How to cite this article:
M Revathi, K Annadurai, C Chinnusamy. Effect of various pre and post emergence herbicides on crop yield and weed dynamics under different rice establishment methods in Sodic soil environment. Int J Chem Stud 2017;5(5):1531-1536.
