Bioefficacy Evaluation and Residue Analysis of Pretilachlor for
Weed Control in Transplanted Rice-Rice Cropping System
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Author:M. Suganthi, O.S. Kandasamy, P. Subbian and R. Rajkumar
p-ISSN:0024-9602, e-ISSN:2582-5321, Vol:97, Issue:apr-jun
DOI: https://doi.org/10.29321/MAJ.10.100365
Abstract
Field experiments were conducted during rabi season and summer season at experimental
farm of the Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore). The
treatments included were five doses of new formulation of pretilachlor (0.5,0.75,1.0,1.5, 3.0 kg
ha-1), butachlor 1.25 kg ha-1, anilofos 0.4 kg ha-1 and rifit 0.75 kg ha-1 (M/s. Gharda chemical
formulation) compared with hand weeding twice and unweeded control. The experiments
were laid out in a randomised block design with three replications. The predominant weeds
of the experimental fields were Echinochloa crus-galli, Leptchloa chinensis among monocots
and Marsilea quadrifoliata among dicots. The results of the experiments revealed that, pre
emergence application of pretilachlor 1.0 kg ha-1 and pretilachlor 0.75 kg ha-1 with a hand
weeding at 45 DAT offered better weed control and resulted in increased yield and economics
of transplanted rice, compared to the recommended weed control methods of butachlor 1.25
kg ha-1, anilofos 0.4 kg ha-1 and rifit 0.75 kg ha-1 and hand weeding twice
Key words : Pretilachlor, weed control, yield, rice