Vol. 11, Issue 9 (2022)

Author(s):
Sai Kumar Midde, Pronitha Chettri, Vikram Sai Mattepally, Kalyan Kumar BV and Maheswara Reddy

Abstract:
An experiment was conducted at experimental research farm Rampur, Doon PG College of Agriculture and Allied Sciences, during the Kharif season 2016-17 to study the effect of different weed management practices on weed population and Yield attributes under the system of rice intensification. The experiment was laid out in Randomized block design which comprises of nine treatments and was replicated thrice viz., Weedy check (W₁), Hand weeding (20 & 40 DAT) (W₂), Cono weeding (20 & 40 DAT) (W₃), Butachlor @ 1.5 kg ha^-1 (Pre-emergence) (W₄), Pretilachlor @ 0.5 kg ha^-1 (Pre-emergence) (W₅), Butachlor @ 1.5 kg ha^-1 + Hand weeding at 30 DAT (W₆), Pretilachlor @ 0.5 kg ha^-1 + Hand weeding at 30 DAT (W₇), Butachlor @ 1.5 kg ha^-1 + Cono weeding at 30 DAT (W₈), Pretilachlor @ 0.5 kg ha^-1 + Cono weeding at 30 DAT (W₉). Rice variety “PS 5” was used as a test crop. The study reveals that the lowest weed density and highest yield attributes were found in Hand weeding twice (20 & 40 DAT), which is on par with Pretilachlor in conjunction with Hand weeding 30 DAT. Due to high laborious requirements and expensive Hand weeding, twice is economically not feasible compared with the Pre-emergence application of Pretilachlor in conjunction with Hand weeding (30 DAT).