Effect of pre and post emergence herbicides on growth and yield of soybean (Glycine max L.)

A field experiment was conducted during kharif, 2024 at Agronomy field, College of Agriculture, Latur (Maharashtra) to study the effect of pre and post emergence herbicides on growth and yield of soybean (Glycine max L.). Experiment was conducted in randomized block design with 3 replications and 7 treatments viz, Pendimethalin 38.7% CS @ 677.25 g a.i/ha (PE) (T₁), Metribuzin 70% WP @ 0.525 kg a.i/ha (PE) (T₂), Metribuzin 70% WP @ 0.525 kg a.i/ha (PoE) (T₃), Propaquizafop 2.5% + Imazethapyr 3.75% w/w ME (T₄), Fomesafen 11.1% + Fluazifop-butyl 11% W/W SL @ 250 g a.i /ha (T₅), Weed free (T₆) and weed check (T₇). Results revealed that growth attributing character viz, plant height, number of branches, number of leaves, dry matter accumulation, leaf area index as well as yield attributing parameters viz, number of pod plant^-1, number of seeds pod^-1, test weight, seed yield, harvest index were found significantly maximum under weed free (T₆) treatment followed by Propaquizafop 2.5% + Imazethapyr 3.75% ME (T₄) and Fomesafen 11.1% + Fluazifop-butyl 11% W/W SL @ 250 g a.i /ha (T₅). Lowest weed density and weed dry matter production was obtained in Weed free (T₆) which was followed by Propaquizafop 2.5% + Imazethapyr 3.75% ME ha^-1 (T₄) and Fomesafen 11.1% + Fluazifop-butyl 11% W/W SL @ 250 g a.i /ha (T₅). Metribuzin 70% WP @ 0.525 kg a.i/ha (PE) (T₂) and Metribuzin 70% WP @ 0.525 kg a.i/ha (PoE) (T₃) showed phytotoxicity to soybean.