Influence of weed management practices on growth and productivity of transplanted rice
1G. Rama Prabavathi, 2*K. Arivukkarasu, 3A. Sundari and 4P. Sivasakthivelan
1,2*,3Department of Agronomy, 4Department of Agricultural Microbiology, Faculty of Agriculture, Annamalai University, Chidambaram- 608002 (India) *Corresponding author: arivuagron@gmail.com
ABSTRACT
A study was designed to identify the best ready-mix herbicide combination in transplanted rice variety ‘ADT 43’ during kharif season 2022. The research consisted of eight treatments were laid out in RBD with three replications. The treatments involve pre-emergence herbicides viz., bensulfuron methyl + pretilachlor @ 660 g ha-1 and pretilachlor + pyrazosulfuron-ethyl @ 615 g ha-1, early post-emergence herbicides viz., bispyribac sodium + pyrazosulfuron-ethyl @ 150 g ha-1, metsulfuron methyl + chlorimuron ethyl @ 20 g ha-1, post-emergence herbicides viz., penoxsulam + cyhalofop-butyl @ 135 g ha-1, triafamone + ethoxysulfuron @ 200 g ha-1 and a treatment with Twice hand weeding which were compared with the treatment unweeded control. All the weed management practices significantly influenced the growth parameters, yield parameters and yield of transplanted rice. The findings revealed that twice hand weeding significantly recorded the maximum growth attributes viz., plant height, LAI and DMP, yield attributes viz., number of productive tillers per meter square and number of filled grains per panicle and yield of rice. However, based on economics, it was concluded that the POE application of triafamone + ethoxysulfuron @ 225 g ha-1 on 21 DAT was found to be an economically feasible, and effective weed management practice for boosting rice productivity to its maximum potential.