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Plant Science Today (PST)

Research Articles

Vol. 12 No. 2 (2025)

Impact of planting patterns and weed control treatments on weed dynamics, growth and yield of transplanted rice under unpuddled and puddled conditions

DOI
https://doi.org/10.14719/pst.7233
Submitted
16 January 2025
Published
30-04-2025 — Updated on 09-05-2025
Versions

Abstract

Rice cultivation faces a major biotic challenge from weeds, which compete aggressively with the crop, hampering its growth and yield potential. Puddling operations in transplanted rice helps to supress weeds. However, the physico-chemical properties of soil are deteriorated with this practice. A field study was conducted for two years in Punjab, India during the kharif seasons of 2023 and 2024 to evaluate the weed dynamics, growth and yield of unpuddled transplanted rice under varying planting patterns and weed control treatments. The research was carried out in split plot design comprising of four planting patterns viz. two rows/ridge, two rows/ridge and one in furrow, flat (unpuddled), flat (puddled) in main plots and four weed control treatments, viz. pendimethalin 0.75 kg ha-1 as pre-em. fb bispyribac sodium 10 SC at 25 g/ha as post-em., pendimethalin 0.75 kg ha-1 as pre-em. fb penoxsulam 240 SC at 24 g ha-1 as post-em., pendimethalin 0.75 kg ha-1 as pre-em. fb fenoxaprop 6.7 EC at 67 g ha-1 as post-em. and unweeded (control) in sub-plots, with four replicates. The findings revealed that transplanting two rows per ridge and one in furrow significantly increased the paddy yield, with significant reduction in weed density and biomass in comparison to other planting patterns. Meanwhile, yields from flat unpuddled and flat puddled transplanting were found to be statistically similar. Among weed control treatments, the application of pendimethalin 0.75 kg ha-1 as pre-em. fb bispyribac 10 SC at 25 g ha-1 as post-em. effectively suppressed the population and biomass of weeds including grasses, sedges and broad-leaved weeds, as compared to all other weed control treatments.

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