Abstract

A field experiment was conducted during rabi season of 2012–13 at Students’ Instructional Farm of Chandra Sekhar Azad University of Agriculture & Technology Kanpur, Uttar Pradesh to evaluate the effect of herbicides metsulfuron-methyl, carfentrazon-ethyl and clodinafop under sole as well as combination with sulfosulfuron and clodinafop fb metsulfuron on wheat growth, yield and yield attributing characters. Among herbicides, maximum plant population and dry matter (60 and 90 DAS) production were found under the treatment sulfosulfuron fb carfentrazone (25 and 15, and 25 and 10 g a. i./ha, respectively). The maximum plant height among herbicides was recorded under sulfosulfuron fb metsulfuron. Herbicide sulfosulfuron fb carfentrazone (15 g a. i./ha) recorded numerically higher values of number of tillers/m2 and effective tillers/m2. However, the herbicidal treatment sulfosulfuron (25 g a. i./ha)+carfentrazon (15 g a. i./ha) recorded significantly highest grain yield of wheat (46.65 q/ha) over unweeded plot, followed by sulfosulfuron (25 g a. i./ha) fb carfentrazon (15 g a. i./ha) (46.50 q/ha). All the yield attributing characters viz., grain weight per ear, number of earheads/m2, number of spikelets/ear and 1000-grain weight were also maximized under sulfosulfuron (25 g a. i/ha)+carfentrazon (10 g a. i./ha) treatment.