Performance of Chemical Herbicides on Weed Dynamics and Economics of Direct Seeded Rice

Author: Ajay Kumar, Sanjay Kumar, Mohammad Rashid Ashrafi*, Prithvi Raj, Ravikesh Kumar Pal and Swaraj Kumar Dutta

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Abstract

In recent years, direct-seeded rice (DSR) has emerged as a viable alternative to conventional transplanted rice. Direct-seeded rice conserves water and has physical, economical and environmental benefits, but weeds represent a major issue for crop production efficiency. It’s tough to manage them with a single pre-or post-emergence herbicide spray since they come in many flushes. Keeping this in mind, a field experiment was conducted during the 2019-20 Kharif season at the Bihar Agricultural University’s Agricultural Research Farm at Sabour, Bhagalpur, to evaluate the effectiveness of various pre-and post-emergence herbicides on weed dynamics and the economics of direct seeded rice. The experiment was laid down into split-plot design with three replications having four pre-emergence herbicides (main plot) and five post-emergence herbicides (sub plot) consisting of twenty treatment combinations. Results revealed that use of Pendimethalin @ 1000 g a.i. ha-1 as pre-emergence followe

Keywords

B:C ratio, Pendimethalin, Post-emergence, Pre-emergence and Weed Dynamics.

Conclusion

Based on the results obtained from this research, it can be concluded that pre-emergence application of Pendimethalin @ 1000 g a.i. ha-1 followed by post-emergence application of Bispyribac @ 25 g a.i. ha-1 + Pyrazosulfuron @ 20 g a.i. ha-1 can manage the weeds effectively and it also proved to be more economical in the cultivation of direct seeded rice.

References

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How to cite this article

Kumar, A., Kumar, S., Ashrafi, M.R., Raj, P., Pal, R.K. and Dutta, S.K. (2021). Performance of Chemical Herbicides on Weed Dynamics and Economics of Direct Seeded Rice. Biological Forum – An International Journal, 13(3a): 427-432.