Priya, H.R. and Kubsad, V.S. (2013) Integrated weed management in rainy season sorghum (Sorghum bicolor). Indian Journal of Agronomy, 58 (4). pp. 548-553.
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Abstract
A field experiment was carried out during the rainy season of 2011 and 2012 in Vertisols at Dharwad, Karnataka, to develop integrated weed management for hybrid sorghum [Sorghum bicolor (L.) Moench] with preemergence application of atrazine @ 0.5 kg/ha, post-emergence application of atrazine @ 0.75 kg/ha, 2, 4-D @0.5 kg/ha, metsulfuron methyl @ 4 g and 6 g/ha, intercultivation and hand-weeding. The maximum average grain yield (4.42 t/ha) was recorded with pre-emergence application of atrazine @ 0.5 kg/ha, followed by post-emergence application of 2, 4-D @ 0.75 kg/ha at 20 days after sowing and interculturing at 30 days after sowing, which was at par with weed free treatment and increased the yield by 39.8% over weedy check and 6.5% over farmer's practice. The higher grain yield may be owing to significantly lower weed dry weight, higher weed-control efficiency and higher nutrient uptake by sorghum which reflected in higher values of grain weight/ear, ear length and 1,000-grain weight. In weedy check, weeds removed 20.5 kg N/ha, 14.9 kg P/ha and 22.3 kg K/ha, being higher than rest of the weed-management practices. Maximum net returns (Rs 29,530/ha) and benefit: cost ratio (2.43) were realized with atrazine @ 0.5 kg/ha (PE), followed by 2, 4-D @ 0.75 kg/ha (PoE) at 20 days after sowing and intercultivation at 30 days after sowing
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Crop protection, Grain yield, Nutrient uptake, Sorghum, Weed control |
| Author Affiliation: | University of Agricultural Sciences, Dharwad, Karnataka - 580 005, India |
| Subjects: | Plant Production |
| Divisions: | Sorghum |
| Depositing User: | Mr T L Gautham |
| Date Deposited: | 02 Apr 2014 10:26 |
| Last Modified: | 02 Apr 2014 10:26 |
| Official URL: | http://www.indianjournals.com/ijor.aspx?target=ijo... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/12758 |
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