Author(s):

Birendra Kumar and Sushanta Sarkar

Abstract: A field experiment was conducted during 2019-20 to evaluate the efficacy of pre and post-emergence herbicides and their combination against complex weed flora in wheat. Twelve treatments consisted with ten herbicidal treatments, pre-emergence application of pendimethalin 750 g/ha, metribuzin 210 g/ha, post-emergence application of sulfosulfuron 25 g/ha, clodinafop 60 g/ha, pendimethalin + metribuzin (1000+175 g/ha), pendimethalin fb sulfosulfuron (1000 fb 18 g/ha), sulfosulfuron + metsulfuron-methyl (30+2 g/ha), pinoxaden + metsulfuron-methyl (60+4 g/ha), mesosulfuron + iodosulfuron-methyl (12+2.4 g/ha) and clodinafop + metsulfuron-methyl (60+4 g/ha) along with two hand weeding at 30 & 60 DAS and weedy check, were tested in randomized block design with three replications. Two hand weedings recorded significantly reduced weed density and weed dry matter at 65 DAS with WCE of 96.22% and was similar to use of pendimethalin fb sulfosulfuron. This herbicide combination resulted in maximum plant height (100.98cm), number of effective spikes/m² (283.56), number of grains/spike (61.92), test weight (39.41g), grain yield (4.26 t/ha), net return (Rs. 38936/ha) and B:C ratio (2.01) compared to other herbicide applications.

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