Author(s): S. K. DWIVEDI AND R. K. SATYARAJ GURU

Abstract: Effect of herbicides were evaluated on weed flora composition, grain and straw yield and economics of direct seeded rice during kharif 2017 and 2018. Based on the summed dominance ratio (SDR), grassy weed species Echinochloa colona (SDR of 39 in 2017 and 55 in 2018) was the most dominant species. Among the herbicide treatments, the application of bispyribac sodium 2% + 2, 4-D sodium salt 54.3% SP with adjuvant (30.0 + 814.5 g ha^-1) recorded the highest grain and straw yield, weed management index, highest net monetary return and B:C ratio and lowest total weed dry weight and weed index. In addition to this it recorded higher net monetary return by 76.86% and 98.16% as compared to the sole application of bispyribac sodium 10% SC @ 20 g a.i. ha^-1 and 2, 4- D EE @ 850 g a.i. ha^-1, respectively.

DOI: 10.22271/09746315.2021.v17.i1.1434

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