National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field experiment was conducted in Randomized complete block design to understand the effect of selective pre and post-emergence herbicides on physiology of rice crop in terms of visual toxicity, flowering and grain filling during the late samba season (October 2019 – February 2020) at wetland farms of Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu. Fourteen herbicide treatments namely Bensulfuron-methyl (0.6%) + Pretilachlor (6%), Metsulfuron-methyl + Chlorimuron-ethyl, Oxadiargyl, Pendimethalin, Butachlor, Pretilachlor as pre-emergence herbicides applied on 3 days after transplantation (DAT); Imazethapyr and Bispyribac-sodium as early post-emergence herbicides applied on 15 DAT; Fenoxaprop-P-ethyl and Cyhalofop-butyl as post-emergence applied on 20 DAT; and Pyrazosulfuron-ethyl as late post-emergence applied on 25 DAT along with herbicide free treatments involving two hand weeding (15 and 25 DAT), weed free check and a control (unweeded) were replicated thrice.The study revealed that pre-emergence application of Butachlor produced the best results with respect to all the three parameters investigated, while the early post-emergence application of Imazethapyr caused maximum damage to the crop, causing the highest phytotoxicity, prolonged 50% flowering and the lowest grain conversion.
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