Author(s):

Rishav Raj, Sushant, Birendra Kumar and Mahendra Singh

Abstract: A field experiment was conducted was conducted during rabi, season of 2019-20 at the Research farm, Bihar Agricultural College, Sabour, Bhagalpur. The experiment consisting of fourteen treatments was laid out in randomized block design with three replications. The crop was infested with the divergent type of weed flora e.g. Phalaris minor, Fumaria parviflora and Cynodon dactylon of grassy, Chenopodium album, Anagallis arvensis, Melilotus alba, Argemona Mexicana and Solanum nigrum of broad-leaved and Cyperus rotundus, Cyprus iria and Cyprus difformis of sedges group. The wheat variety HD-2967 was grown on 23^th November 2019, and harvesting was done on 5^th April, 2020. The results revealed that ready-mix application of (clodinafop-propargyl @ 60 g a.i. ha^-1 + metsulfuron-methyl @ 4 g a.i. ha^-1 PoE) and (mesosulfuron @ 12 g a.i. ha^-1 + iodosulfuron-methyl-sodium @ 2.4 g a.i. ha^-1 PoE) gave higher weed control efficiency (82.02%, 79.31%), lower weed index (4.56%, 6.81%0) respectively. Both of these treatments recorded 69.04 and 65.47 per cent grain yield enhancement along with 62.61% and 61.06% higher net returns over the weedy check with the highest benefit-cost ratio (1.65 and 1.57). No any phytotoxic symptoms has been recorded under these two treatments. Based on all the observation recorded, clodinafop-propargyl @ 60 g a.i. ha^-1 + metsulfuron-methyl @ 4 g a.i. ha^-1 PoE has performed better in all respects amongst all the herbicide applied treatment followed by mesosulfuron @ 12 g a.i. ha^-1 + iodosulfuron-methyl-sodium @ 2.4 g a.i. ha^-1 PoE.

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