Vol. 12, Issue 5 (2023)

Author(s):
Uma Shankar Bagri, BS Kasana, Lakhan Singh Mohaniya, Pankaj Kumar Bagri and Vinod Mitoliya

Abstract:
A field experiment was conducted at Research Farm of College of Agriculture, Gwalior during rabi, 2020-21 and 2021-22 to find out the suitable post emergence herbicides or their combinations on productivity and profitability of Black wheat. The experiment was laid out in randomized block design with sixteen treatments viz; T₁: Sulfosulfuron @ 30 g/ha, T₂: metsulfuron @ 4g/ha, T₃: Sulfosulfuron + Metsulfuron @ 32 g/ha, T₄: Clodinafop @ 60 g/ha, T₅: Clodinafop @ 60 g/ha fb Metsulfuron @ 4g/ha, T₆: 2,4-D @ 500 g/ha, T₇: Clodinafop @ 60 g/ha fb 2,4-D @ 500 g/ha, T₈: Metribuzin @ 210 g/ha, T₉: Metribuzin @ 210 g/ha fb Clodinafop @ 60 g/ha, T₁₀: Pinoxaden @ 45 g/ha, T₁₁: Pinoxaden @ 45 g/ha fb Metsulfuron @ 4 g/ha, T₁₂: Pyroxasulfone @ 127.5 g/ha, T₁₃: Pyroxasulfone @ 127.5 g/ha fb Metsulfuron @ 4g/ha, T₁₄: Pinoxaden @ 45 g/ha fb 2,4-D @ 500 g/ha, T₁₅: Weed free (two hand weeding 20, 40 DAS), T₁₆: Weed check. Hand weeding twice at 20 and 40 DAS recorded the lowest total weed density and total weed dry weight (0.0 no/m² and 0.0 g/m²) with higher weed control efficiency (%) followed by Clodinafop @ 60 g/ha fb Metsulfuron @ 4 g/ha (23.8 no./m2 and 9.9 g/m² respectively) and these treatments significantly reduced the density and dry weight of total weeds over rest of the herbicidal treatments and weedy check. Other post emergence; herbicides significantly reduced the weed dry weight over alone application of herbicides. Among the weed control treatments pooled values of hand weeding twice at 20 and 40 DAS recorded higher grain and yield (50.1 and 73.8 q/ha). However, lower grain and straw yield was recorded in weedy check (21.5 and 37.4q/ha) followed by pinoxaden @ 45 g/ha. Alone application of herbicides i.e. Clodinofop @ 60 g/ha, Pyroxasulfone @ 127.5 g/ha, metribuzin @ 210 g/ha and 2, 4-D @ 500 g/ha increase grain yield (q/ha). However, Pooled value of Clodinofop @ 60 g/ha fb Metsulfuron @ 4 g/ha recorded significantly higher grain yield (49.3 q/ha) followed by Pinoxaden @ 45 g/ha fb Metsulfuron @ 4 g/ha Pyroxasulfone @ 127.5 g/ha fb Metsulfuron @ 4 g/ha, Sulfosulfuron + Metsulfuron @ 32 g/ha.