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Plant Science Today (PST)

Research Articles

Vol. 12 No. sp3 (2025): Advances in Plant Health Improvement for Sustainable Agriculture

Integrated weed management enhanced the aerobic rice performance by suppressing weeds at critical competition period with low residue herbicides

DOI
https://doi.org/10.14719/pst.8269
Submitted
14 March 2025
Published
28-07-2025

Abstract

Aerobic rice is a newly evolved agro technique for enhanced yield and water productivity which is threatened by higher weed infestation affecting the crop yield and quality. Sole herbicide usage for weed management leads to higher chemical load on the ecosystem distressing the soil ecology. To address this issue, the present study on integrated weed management (IWM) practices in aerobic rice was conducted at Tamil Nadu Agricultural University (TNAU), Coimbatore during Kharif 2022. Preliminary study indicated that 30 g/ha of pyrazosulfuron-ethyl and 40 g/ha of bispyribac-sodium were found optimum for weed management. Subsequently, main field experiment was taken up in a randomized block design (RBD) with three replications. Six IWM practices were tested against conventional weed management practices. The results of the study revealed that the pre-emergent application of pyrazosulfuron ethyl fb early-post emergent bispyribac sodium fb one mechanical weeding upregulated the aerobic rice yields by 2.36 times and net returns to ₹29244/ ha. The enhancement in aerobic rice performance was clearly attributable to reduced weed menace during the critical period of crop weed competition. The same treatment controlled the weeds from sowing till harvest with weed control efficiency and index of 91.19 % and 89.01 % respectively, that improved the rice above and below-ground parameters. The integration of pre- and early post-emergent herbicide along with physical weed removal methods was found to be effective in curbing weed growth, enhancing crop performance and maximizing the net returns with low residue herbicides for subsequent crop under aerobic rice.

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