1Department of Agronomy. College of Agriculture, UAHS Shivamogga
2Department of Agronomy, ZAHRS, Brahamavar
Corresponding Author's Email: firstname.lastname@example.org
A field experiment was conducted during kharif 2015 at ZAHRS, Bramahavara to screen efficacy of pre and post emergent herbicides. The herbicides included were Bensulfuron methyl 0.6% G @ 60 g a.i. ha-1 + Pretilachlor 6% G @ 600 g a.i. ha-1, Pyrazosulfuran ethyl 10 WP @ 25g a.i. ha-1, Bispyribac sodium 10 SC @ 20g a.i. ha-1, Penoxsulum 240 SC @ 22.5g a.i. ha-1 and Ethoxysulfuron 15 WG @ 18.75g a.i. ha-1. In addition hand weeding twice at 20 and 40 DAP and weedy check was also included for comparison. Among herbicides, sequential application of Pyrazosulfuran ethyl 10 WP @ 25g a.i. ha-1 at 3 DAP in combination with Penoxsulum 240 SC @ 22.5g a.i.ha-1 at 20 DAP recorded significantly lower weed population (9.67 to 36.00 0.25 m-2) and dry matter production (0.33 to 3.30 g 0.25 m-2) as a result recorded significantly higher grain yield (5351 kg ha-1). The same treatment recorded the higher weed control efficiency and lower weed index.
Keywords: Efficacy, Pre and Post Emergent Herbicides, Rice, Coastal Zone, Karnataka
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