Author(s): S. P. BHATTACHARYA, M. SAHA, S. PAL, H. BANERJEE AND C. K. KUNDU

Abstract: An experiment conducted during the boro, season 2003 (January to May 2003) at Mondouri Farm of the Bidhan Chandra Krishi Viswavidyalaya on weed management in summer rice clearly revealed that the dominant weed flora in the \' experimental field were Echinochloa crusgalli, Altemanthera sessilis, Fimbristylis miliacea, Sphenoclea zeylanica. It was further evident that though hand weeding twice (20 and 40 DAT) recorded the highest grain yield it was at par with the treatment T3 (Oxadiargyl 80% WP@ 100g a.i./ha) and T7 (Butachlor 50% EC@ 1250 g. a.i./ha). All the above treatments recorded lower weed density and weed dry weight as compared to untreated control without showing any phytotoxicity. It is therefore quite obvious from the experimental findings that Oxadiargyl 80% WP .@ 100 g.a.i./ha or Butachlor 50 EC @ 1250 g.a.l./ha as pre-emergence application can safely replace the laborious, time consuming and costly hand weeding.

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