Bio-efficacy and phytotoxicity of pre-emergence herbicide mixtures on weed growth and yield in transplanted rice (Oryza sativa)

SHRIJAN  KAFLE; MANOJ KUMAR  SINGH; DENDUKURI UDAYA  LAKSHMI; VIRENDRA  CHOUDHARY

doi:10.56093/ijas.v96i8.159025

Authors

SHRIJAN KAFLE Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221 005, India
MANOJ KUMAR SINGH Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221 005, India
DENDUKURI UDAYA LAKSHMI Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221 005, India
VIRENDRA CHOUDHARY College of Agriculture, Swami Keshwanand Rajasthan Agricultural University, Bikaner, Rajasthan, India

https://doi.org/10.56093/ijas.v96i8.159025

Keywords:

Oxidiazon + pretilachlor, Weed density, Weed management

Abstract

A field experiment was conducted to evaluate the bio-efficacy and phytotoxicity of pre-emergence herbicide mixtures on weed growth and yield in transplanted rice (Oryza sativa L.) cv. ‘Samba Mahsuri’ (BPT-5204) during kharif 2023 with nine treatments replicated thrice at the Agricultural Research Farm, Banaras Hindu University, Varanasi, Uttar Pradesh. The weed flora in the trial comprised of grasses (Cynodon dactylon, Echinochloa colona, Paspalum distichum), sedges (Cyperus rotundus, Fimbristylis miliacea, Cyperus difformis), and broad-leaved weeds (Ipomoea aquatica, Sagittaria guayanensis, Marsilea quadrifolia, Eclipta prostrata, Rotala densiflora). Among all the treatments, oxidiazon + pretilachlor @520 + 150 mL a.i./ha (T₉) recorded significantly lowest weed density (355 weeds/m²) and weed dry weight (197.46 g/m²) at 60 DAA. It also recorded significantly highest yield attributes, effective tillers, panicle weight, filled grains/panicle and test weight resulting in the highest grain yield, net return and BC ratio with slight to moderate phytotoxicity symptoms at 7 and 14 DAA but the crop recovered completely by 21 days without any lasting effect on growth or productivity. It also registered lowest weed density and weed dry weight, highest yield attributes viz., effective tillers (413/m²), panicle weight (3.3 g), filled grains/panicle (168) and test weight (19.01 g), resulting in the highest grain yield (5.41 t/ha), net return (₹90,944/ha) and benefit-cost ratio (3.83) in transplanted rice. It may, therefore, be concluded that application of oxidiazon + pretilachlor @520 + 150 mL a.i./ha can be recommended as an effective and economically viable pre-emergence herbicide mixture for weed management in transplanted rice under the agro- climatic conditions of Varanasi region.

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References

Fitzgerald M A, McCouch S R and Hall R D. 2009. Not just a grain of rice: The quest for quality. Trends in Plant Science 14(3): 133–39. https://doi.org/10.1016/j.tplants.2008.12.004 DOI: https://doi.org/10.1016/j.tplants.2008.12.004

Jabran K, Uludag A and Chauhan B S. 2018. Sustainable weed control in rice. (In) Weed Control, pp. 276–87. CRC press, Boca Raton. DOI: https://doi.org/10.1201/9781315155913-14

Kumar V and Ladha J K. 2011. Direct seeding of rice: Recent developments and future research needs. (In) Advances in agronomy, pp. 297–413. Sparks D L (Eds). Academic Press, Cambridge. DOI: https://doi.org/10.1016/B978-0-12-387689-8.00001-1

Mohapatra S, Tripathy S K, Nayak B R and Mohanty A K. 2017. Efficacy of pre-emergence herbicides for control of complex weed flora in transplanted rice. Indian Journal of Weed Science 49(3): 216–18. DOI: https://doi.org/10.5958/0974-8164.2017.00057.0

Muthayya S, Rah J H, Sugimoto J D, Roos F F, Kraemer K and Black R E. 2013. The global hidden hunger indices and maps: An advocacy tool for action. PloS One 8(6): 67860. https://doi.org/10.1371/journal.pone.0067860 DOI: https://doi.org/10.1371/journal.pone.0067860

Shahabuddin M, Hossain M M, Salim M and Begum M. 2016. Efficacy of pretilachlor and oxadiazon on weed control and yield performance of transplant Aman rice. Progressive Agriculture 27(2): 119–27. https://doi.org/10.3329/PA.V27I2.29320 DOI: https://doi.org/10.3329/pa.v27i2.29320

Singh V P, Singh G and Singh M. 2004. Effect of fenoxaprop-p- ethyl on transplanted rice and associated weeds. Indian Journal of Weed Science 36(3and4): 190–92.

Singh V, Jat M L, Ganie Z A, Chauhan B S and Gupta R K. 2016. Herbicide options for effective weed management in dry direct-seeded rice under scented rice-wheat rotation of western Indo-Gangetic Plains. Crop Protection 81: 168–76. https://doi.org/10.1016/j.cropro.2015.12.021 DOI: https://doi.org/10.1016/j.cropro.2015.12.021