Evaluation of different weed management practices on growth, yield and economics of transplanted rice (Oryza sativa L.)
1*E. Balaji, 2R. Raman, 3R. Krishnamoorthy and 4K. Dhanasekaran
1,2,3Department of Agronomy, 4Department of Soil Science and Agricultural Chemistry, Faculty of Agriculture Annamalai University, Annamalainagar-608 002, Tamil Nadu India *e-mail: balajibala084@gmail.com
ABSTRACT
A field experiment was conducted in farmer s field in Thiruvennainallur village, Villupuram District, Tamil Nadu, India during Navarai season of 2021 in order to evaluate the different weed management practices on growth and yield of rice under transplanted conditions. The experiment was laid out in a randomized block design, having fourteen treatments and replicated thrice. Treatment consists of hand weeding, butachlor, pretilachlor, pyrazosulfuron ethyl, bispyribac sodium, fenoxaprop –p– ethyl, Triafamone + ethoxy sulfuron, metsulfuron methyl + chlorimuron ethyl and penoxsulam + cyhalofop butyl were used as herbicides. Comparing with all treatments, hand weeding twice performed better in this experiment. Among the different herbicides tried out, pre emergence application of pyrazosulfuron ethyl 10% WP @ 0.15 gha fb post emergence application of bispyribac sodium 10% SC @ 0.25 lha recorded the highest weed control efficiency {85.68,81.36 %}, crop resistance index {14.36, 10.89 %}, leaf area index {3.21, 5.90}, number of grain {100.98}, number of filled grains {89.19} with net income { 40,229} and benefit cost ratio {1.63}.