This article Citation:

T.U. Patel, D.H. Lodaya, A.P. Italiya, D.D. Patel and H.H. Patel . 2018. Bio-efficacy of herbicides in direct-seeded rice . Indian Journal of Weed Science : 50( 2) 120- 123.







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Volume Issue Publication year Page No Type of article
50 2 2018 120-123 Research article
Bio-efficacy of herbicides in direct-seeded rice

T.U. Patel, D.H. Lodaya, A.P. Italiya, D.D. Patel and H.H. Patel

DOI: http://dx.doi.org/10.5958/0974-8164.2018.00030.8

Email: tushagri.ank@nau.in
Address: Department of Agronomy, N.M. College of Agriculture, Navsari Agricultural University, Navsari, Gujarat 396 450

Keywords:

Bispyribac-sodium

Cyhalofop-butyl

Glyphosate

Hand weeding

Pretilachlor

Pyrazosulfuron-ethyl

Direct-seeded rice

Stale seedbed



Abstract:

A field study was conducted during summer seasons of 2015 and 2016 to evaluate the efficacy of post-emergence herbicides at Navsari Agricultural University, Navsari. Total twelve treatments consisting of pretilachlor 1250 g/ha and pyrazosulfuron-ethyl 25 g/ha as pre-emergence (PE); bispyribac-sodium salt 50 g/ha and cyhalofop-butyl 100 g/ha at 20 DAS as post-emergence; stale seedbed, hand weeding and unweeded check were evaluated. Pretilachlor 1250 g/ha PE or pyrazosulfuron-ethyl 25 g/ha fb bispyribac-sodium salt 50 g/ha at 30 DAS suppressed both weed density and dry weight over control. Growth and yield attributes, viz. plant height, no. of tillers, no. of panicles/length of panicles and no. of grain/panicles were improved significantly with pretilachlor 1250        g/ha PE fb bispyribac-sodium salt 50 g/ha at 30 DAS and pyrazosulfuron-ethyl 25 g/ha fb bispyribac-sodium salt 50 g/ha at 30 DAS. Similarly, higher rice grain and straw yields and maximum net returns were also associated with these combinations. Pre- and post-emergence application of pretilachlor 1250 g/ha or pyrazosulfuron-ethyl 25 g/ha PE fb bispyribac-sodium salt 50 g/ha at 30 DAS appeared to be a viable strategy for weed control in direct-seeded rice with higher economic returns.





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