Singh, M. K.Ashrafi, Rashid2021-10-072021-10-072020https://krishikosh.egranth.ac.in/handle/1/5810176720The present study entitled “Studies on weed management in transplanted finger millet” was performed during Kharif season 2019 at Research Farm, Bihar Agricultural University, Sabour, Bhagalpur to find out the outcome of different weed control treatment on growth parameter, yield attributes, weed dynamics, nutrient uptake by crop and weed and economics of transplanted finger millet. The experiment was laid out in randomized block design with three replication and consisting eleven treatment viz., T1 (Weedy check), T2 (Hoeing at 20 and 40 DAT), T3 (Pendimethalin @ 750 g ai ha-1 as pre-emergence), T4 (2, 4- D @ 750 g ai ha-1 as post-emergence), T5 (Bispyribac sodium @ 20 g ai ha-1 as post-emergence), T6 (Pendimethalin @ 750 g ai ha-1 as pre-emergence fb 2, 4-D @ 750 g ai ha-1 as post-emergence), T7 (Pendimethalin @750 g ai ha-1 as pre-emergence fb Bispyribac sodium @ 20 g ai ha-1 as post-emergence), T8 (Pretilachlor @1000 g ai ha-1 as pre-emergence), T9 (Pretilachlor @1000 g ai ha-1 as pre-emergence fb 2, 4- D @ 750 g ai ha-1 as post-emergence), T10 (Pretilachlor @1000 g ai ha-1 as pre- emergence fb Bispyribac sodium @ 20 g ai ha-1 as post- emergence) and T11 (weed free). Among different weed management treatments, T11 (Weed free) recorded highest plant height, LAI and dry matter accumulation which on par with T2 (hoeing at 20 and 40 DAT) in case of plant height, and T7 (Pendimethalin @750 g ai ha-1 as pre-emergence fb bispyribac sodium @ 20 g ai ha-1 as post-emergence) and T10 (Pretilachlor @1000 g ai ha-1 as pre-emergence fb bispyribac sodium @ 20 g ai ha-1 as post- emergence) in case of dry matter accumulation. Significantly more number of tillers hill-1 was recorded with T10 (Pretilachlor @1000 g ai ha-1 as pre-emergence fb bispyribac sodium @ 20 g ai ha-1 as post-emergence which was on par with T5 and T7. Among different weed control treatment, significantly higher ear weight (8.52 g), longest finger length (8.90 cm), number of fingers ear-1 (7.22) and test weight (4.53 g) was recorded with T11(Weed free) which was at par with T2 (Hand weeding at 20 and 40 DAT), T10 (Pretilachlor @1000 g ai ha-1 as pre-emergence fb bispyribac sodium @ 20 g ai ha-1 as post-emergence) and T7 (Pendimethalin @750 g ai ha-1 as pre-emergence fb bispyribac sodium @ 20 g ai ha-1 as post-emergence). However, significantly highest number of ears m-2 (158.67) was noticed with T10 (Pretilachlor @1000 g ai ha-1 as pre-emergence fb bispyribac sodium @ 20 g ai ha-1 as post- emergence) which remain at par with T7 and T5 treatment. Significantly highest grain and straw yield was noticed with T11 (Weed free) treatment which was on par with T2 (Hoeing at 20 and 40 DAT), T7 (Pendimethalin @750 g ai ha-1 as pre-emergence fb bispyribac sodium @ 20 g ai ha-1 as post-emergence) and also with T10 (Pretilachlor @1000 g ai ha-1 as pre-emergence fb bispyribac sodium @ 20 g ai ha-1 as post-emergence) treatment. Significantly highest net returns (52253 Rs ha-1) and B:C ratio (1.70) was recorded with T10 (Pretilachlor @1000 g ai ha-1 as pre-emergence fb bispyribac sodium @ 20 g ai ha-1 as post- emergence) which remain at par with T7 (Pendimethalin @750 g ai ha-1 as pre-emergence fb bispyribac sodium @ 20 g ai ha-1 as post-emergence) and also with T5 (Bispyribac sodium @ 20 g ai ha-1 as post-emergence) treated plot. Weed population (No m-2) and weed dry weight were noticed lowest while highest weed control efficiency was noticed with T2 (Hoeing at 20 and 40 DAT) which was at par with T10 (Pretilachlor @1000 g ai ha-1 as pre-emergence fb bispyribac sodium @ 20 g ai ha-1 as post-emergence), T7 (Pendimethalin @750 g ai ha-1 as pre-emergence fb bispyribac sodium @ 20 g ai ha-1 as post-emergence) and also with T5 (Bispyribac sodium @ 20 g ai ha-1 as post-emergence) treated plot. On basis of results obtained, it can be concluded that sequential application of pendimethalin @750 g ai ha-1/ pretilachlor @1000 g ai ha-1 as pre-emergence fb bispyribac sodium @ 20 g ai ha-1 as post-emergence for higher yield, net return, B:C ratio and effective weed control in transplanted finger millet.EnglishThesis